WO2014188467A1 - アンテナ装置用基板及びアンテナ装置 - Google Patents
アンテナ装置用基板及びアンテナ装置 Download PDFInfo
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- WO2014188467A1 WO2014188467A1 PCT/JP2013/003195 JP2013003195W WO2014188467A1 WO 2014188467 A1 WO2014188467 A1 WO 2014188467A1 JP 2013003195 W JP2013003195 W JP 2013003195W WO 2014188467 A1 WO2014188467 A1 WO 2014188467A1
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- extending
- extending portion
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- antenna
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
- H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
- H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
- H01Q5/364—Creating multiple current paths
- H01Q5/371—Branching current paths
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
- H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
Definitions
- the present invention relates to an antenna device substrate and an antenna device capable of making a plurality of resonances.
- Patent Document 1 proposes a composite antenna that achieves high efficiency by forming a radiation electrode on a resin molded body and further integrating the dielectric block with an adhesive.
- Patent Document 2 a first radiation electrode, a second radiation electrode, a middle portion of the first radiation electrode, and a base end of the second radiation electrode are disclosed.
- An antenna device has been proposed that includes a switch interposed between the first radiation electrode and the second radiation electrode to electrically connect or disconnect the first radiation electrode.
- the antenna performance may be degraded or unstable depending on the adhesive conditions (adhesive thickness, adhesive area, etc.) in addition to the adhesive Q value.
- the number of elements increases.
- a configuration of a control voltage source, a reactance circuit, and the like are required to switch the resonance frequency with the switch.
- each device is complicated, there is no degree of freedom in design, and easy antenna adjustment is difficult.
- the present invention has been made in view of the above-mentioned problems, and can flexibly adjust each resonance frequency that has been double-resonated. It is an object of the present invention to provide an antenna device substrate and an antenna device that can be reduced in thickness.
- the antenna device substrate according to the first invention includes an insulating substrate body, and a first element, a second element, a third element, a fourth element, and a ground, each of which is patterned with a metal foil on the substrate body.
- the first element is provided with a feeding point at the base end in the vicinity of the ground plane, and the first connection part to which the first passive element can be connected and the antenna element of the dielectric antenna in this order.
- the second element has a base end connected between the feeding point of the first element and the first connection portion, and a second passive element can be connected in the middle of the second connection.
- the third element extends with a third connection portion to which the feed point is connected to a base end and a third passive element can be connected in the middle
- the fourth element has a base end that is the third element. Extending from the first element to the fourth element, having a fourth connection part that can be connected to the fourth passive element in the middle of the connection between the feeding point of the cable and the third connection part
- Each element extends at a distance from the adjacent element and the ground plane so that stray capacitance between adjacent elements and a stray capacitance between the ground plane can be generated. It is characterized by that. *
- each element from the first element to the fourth element can generate a stray capacitance between adjacent elements and a stray capacitance between the ground planes. Since it extends at a distance from the surface, the antenna element of the loading element that does not self-resonate at a desired resonance frequency and the stray capacitance between each element can be effectively used to achieve double resonance (2 ⁇ 4 resonances).
- Each resonance frequency can be flexibly adjusted by selecting the antenna element and the first to fourth passive elements connected to the first to fourth connection portions (constant change, etc.), and 2 to 4 according to the design conditions. An antenna device capable of resonance can be obtained.
- each resonance frequency can be flexibly adjusted with a single antenna device board in the antenna configuration, so that the resonance frequency can be switched, and the adjustment location by passive elements etc. can be changed according to the application and equipment It has become.
- the bandwidth can be adjusted by setting the length and width of each element and each stray capacitance.
- it can be designed in the plane of the substrate body, and can be made thinner than when using a conventional dielectric block or resin molded body, and also by selecting an antenna element that is a dielectric antenna. , Downsizing and high performance are possible. Further, there is no need for costs due to molds, design changes, etc., and low costs can be realized.
- a substrate for an antenna device wherein a base end is connected to the ground surface and a tip is closer to a base end side than a connection portion of the first element with the second element.
- a first ground connection portion connected to the first ground connection portion, a proximal end of the first ground connection portion being connected to the ground surface apart from a position where the first ground connection portion is connected, and a distal end of the third element connected to the fourth element of the third element
- a second ground connection portion connected to the proximal end side of the connection portion of the first element, a distal end side of the connection portion of the first ground connection portion of the first element, and the second ground connection portion of the third element.
- a connecting pattern extending by connecting the tip side to the connecting portion, and an annular opening pattern between the connecting pattern and the first element and the third element in the vicinity of the feeding point. Wherein the down section is formed.
- an annular opening pattern portion is formed between the connection pattern and the first element and the third element in the vicinity of the feeding point.
- the opening pattern portion allows the high-frequency current to flow from the feeding point to each element on the first element (including the second element) side and the third element (including the fourth element) side in a balanced and effective manner. be able to.
- it is effective when the distance from the peripheral parts becomes short with the miniaturization and thinning, and it is possible to achieve both miniaturization and high performance.
- the antenna device substrate according to a third invention is the antenna device substrate according to the first or second invention, wherein the first element extends from the feeding point in one of the directions along the ground plane, A second extending portion extending in a direction away from the ground surface from the tip of the first extending portion, and a direction along the ground surface from the tip of the second extending portion via the first connecting portion A third extending portion connected to the antenna element extending in the same direction, and the second element extends from the tip of the second extending portion via the second connecting portion.
- a fourth extension extending in the same direction as the second extension, and a fifth extension extending in the direction along the third extension from the tip of the fourth extension toward the antenna element.
- a sixth extension extending from the feed point to the other side in the direction along the ground plane.
- a seventh extending portion extending through the third connecting portion in a direction away from the ground surface from the tip of the sixth extending portion, and the fourth extending from the tip of the seventh extending portion.
- An eighth extension part extending in a direction along the ground surface toward the extension part, and the fourth element has a tip connected to the middle of the seventh extension part and the A ninth extension portion extending in the same direction at a distance from the seventh extension portion; and a tenth extension extending from the tip of the ninth extension portion in a direction away from the seventh extension portion. It has the part. *
- the first element has the third extending portion from the first extending portion
- the second element has the fourth extending portion and the fifth extending portion
- the third element Has the sixth extension portion to the eighth extension portion
- the fourth element has the ninth extension portion and the tenth extension portion, so that the stray capacitance between the first element and the ground plane is A stray capacitance between the antenna element and the fifth extension portion, a stray capacitance between the third extension portion and the fifth extension portion, and a fifth extension portion and an eighth extension portion.
- a stray capacitance between the first extension portion and the sixth extension portion and the eighth extension portion, a stray capacitance between the seventh extension portion and the ninth extension portion, A stray capacitance between the tenth extending portion and the ground plane can be generated, and a high degree of freedom of adjustment of each resonance frequency can be obtained.
- the antenna device substrate according to a fourth invention is the antenna device substrate according to the third invention, wherein the base end side of the fifth extending portion is formed wider than the tip end side of the portion facing the antenna element. It is characterized by being.
- the base end side of the fifth extending portion facing the antenna element is a wide portion formed wider than the tip end side, and thus does not interfere with the antenna element.
- the antenna device substrate according to a fifth invention is the antenna device substrate according to the third or fourth invention, wherein the first element extends from the tip of the third extension portion toward the ground surface, And a twelfth extending portion extending from the tip of the eleventh extending portion along the ground surface toward the first extending portion. That is, in the antenna device substrate, the first element includes the eleventh extending portion extending from the tip of the third extending portion toward the ground surface, and the first element extending from the tip of the eleventh extending portion along the ground surface. Since it has the 12th extension part extended toward 1 extension part, the stray capacity between the 12th extension part and the 3rd extension part, and the 12th extension part and the ground plane Stray capacitance in between. *
- the antenna device substrate according to a sixth aspect of the present invention is the antenna device substrate according to any one of the third to fifth aspects, wherein the tenth extending portion extends in a direction away from the ground surface on the proximal end side of the tenth extending portion.
- the existing part is connected. That is, in this antenna device substrate, the thirteenth extending portion and the seventh extending portion are connected to the base end side of the tenth extending portion so as to extend in the direction away from the ground surface.
- a stray capacitance can be generated between the extended portion and the high frequency current can be distributed in a direction away from the ground plane by the thirteenth extended portion.
- a space for fixing the board body with screws can be secured in this region. *
- the antenna device substrate according to a seventh invention is the antenna device substrate according to any one of the third to sixth inventions, wherein the eighth extending portion is connected to the front surface side through a through hole, and a pattern is formed on the back surface of the substrate body.
- the first back surface pattern portion is formed, and the first back surface pattern portion is formed wide toward the ground surface. That is, in this antenna device substrate, the eighth extending portion has a first back surface pattern portion connected to the front surface side through a through hole and patterned on the back surface of the substrate body, and the first back surface pattern portion.
- the eighth extending portion since it is formed wider toward the ground surface, it is possible to effectively generate stray capacitance between the sixth extending portion and the sixth extending portion without interfering with the sixth extending portion.
- the first back surface pattern portion is widened toward the ground surface, the impedance is also lower than that of the sixth extension portion, and the stray capacitance between the first extension portion and the eighth extension portion is caused. The influence of interference can be reduced.
- the antenna device substrate wherein the thirteenth extending portion is connected to the front surface side through a through hole and is patterned on the rear surface of the substrate body. And the second back surface pattern portion is formed wider toward the ground surface. That is, in this antenna device substrate, the 13th extending portion has a second back surface pattern portion connected to the front surface side through a through hole and patterned on the back surface of the substrate body, and the second back surface pattern portion.
- the first back surface pattern portion and the second back surface pattern portion it is possible to achieve both higher performance and downsizing of the antenna without increasing the antenna occupation area.
- An antenna device substrate is characterized in that, in the second invention, an impedance adjustment passive element is connected to each of the first ground connection portion and the second ground connection portion. That is, in this antenna device substrate, since the impedance adjustment passive elements are connected to the first ground connection portion and the second ground connection portion, respectively, the setting of the opening pattern portion and the setting of the two impedance adjustment passive elements are performed. Thus, impedance adjustment of each frequency band can be performed.
- An antenna device includes any one of the first to ninth antenna device substrates, wherein the first passive element, the second passive element, the third passive element, and the fourth passive element are included. , Respectively corresponding to the first connection part, the second connection part, the third connection part and the fourth connection part. That is, in this antenna device, the first passive element, the second passive element, the third passive element, and the fourth passive element respectively correspond to the first connection part, the second connection part, the third connection part, and the fourth connection part. Therefore, it is possible to achieve 2 to 4 resonances by simply selecting the first to fourth passive elements as appropriate, and communication is possible at two to four resonance frequencies corresponding to each application and device. *
- An antenna device includes any one of the first to ninth antenna device substrates, wherein the first passive element is connected to the first connection portion, and the second passive element, the first One or two of three passive elements and the fourth passive element are connected to the corresponding second connection part, third connection part, and fourth connection part, respectively. That is, in this antenna device, the first passive element is connected to the first connection portion, and any one or two of the second passive element, the third passive element, and the fourth passive element correspond to the corresponding second connection. The second passive element, the third passive element, and the fourth passive element in a state where any one or two of the second passive element, the third passive element, and the fourth passive element are not used. Two resonances or three types of three resonances are possible.
- each element from the first element to the fourth element has a stray capacitance between adjacent elements and a ground plane. Since each of the capacitors extends to the adjacent element and the ground plane so as to be capable of generating a capacitance, a double resonance (2 to 4 resonances) can be achieved.
- FIG. 1 is a wiring diagram illustrating an antenna device in an embodiment of a substrate for an antenna device and an antenna device according to the present invention.
- it is a wiring diagram which shows the stray capacitance produced with an antenna apparatus.
- it is the top view and back view which show the board
- it is a top view which shows an antenna apparatus.
- they are a perspective view (a), a plan view (b), a front view (c), and a bottom view (d) showing an antenna element.
- it is explanatory drawing for demonstrating the function of an opening pattern part.
- FIG. 4 is a graph showing VSWR characteristics (voltage standing wave ratio) at four resonances in an example of an antenna device substrate and an antenna device according to the present invention.
- VSWR characteristics voltage standing wave ratio
- the antenna device substrate 1 includes an insulating substrate body 2 and a first element EL ⁇ b> 1 patterned on the substrate body 2 with a metal foil such as a copper foil. , Second element EL2, third element EL3, fourth element EL4, and ground plane GND. Note that a mounting area for RF circuit components and the like is provided on the ground plane GND.
- the ground surface GND is formed not only on the front surface of the substrate body 2 but also on the back surface in the same pattern corresponding to the front surface. *
- the first element EL1 is provided with a feeding point FP at the base end in the vicinity of the ground plane GND, and a first connection portion C1 to which the first passive element P1 can be connected midway and an antenna element AT of the dielectric antenna.
- the first passive element P1 is mounted on each of the two first connection portions C1, and the two first passive elements P1 are connected in series.
- the second element EL2 includes a second connection portion C2 whose base end is connected between the feeding point FP of the first element EL1 and the first connection portion C1, and to which the second passive element P2 can be connected. It is extended. *
- the third element EL3 has a power supply point FP connected to the base end and has a third connection portion C3 to which the third passive element P3 can be connected midway.
- the third passive element P3 is mounted on each of the two third connection portions C3, and the two third passive elements P3 are connected in series.
- the fourth element EL4 has a base end connected between the feeding point FP of the third element EL3 and the third connection portion C3, and has a fourth connection portion C4 to which the fourth passive element P4 can be connected midway. It is extended.
- the fourth passive element P4 is mounted on each of the two fourth connection portions C4, and the two fourth passive elements P4 are connected in series.
- the first passive element P1, the third passive element P3, and the fourth passive element P4 each use a combination of two passive elements. However, two passive elements having the same characteristics may be used and different characteristics may be used. Two passive elements may be used. Further, instead of a combination of two passive elements, one passive element or a combination of three or more passive elements may be used. *
- the first element EL1 extends in one direction along the ground plane GND in a direction extending away from the ground plane GND from the front end of the first extension E1 extending from the feeding point FP.
- the second extending portion E2 is connected to the antenna element AT extending in the direction along the ground plane GND from the tip of the second extending portion E2 via the first connecting portion C1.
- the direction along the ground plane GND is the direction along the end side of the opposing ground plane GND.
- the first extending portion E1 extends from the feeding point FP in one direction along the ground plane GND, then extends in a direction away from the ground plane GND, and further extends in one direction along the ground plane GND. It extends in one direction along the ground surface GND as a whole while bending in a crank shape.
- the first element EL1 includes an eleventh extending portion E11 extending from the tip of the third extending portion E3 toward the ground surface GND, and a first element extending from the tip of the eleventh extending portion E11 along the ground surface GND. And a twelfth extending portion E12 extending toward the extending portion E1. That is, the tip end side of the first element EL1 is folded back by the eleventh extending portion E11 and the twelfth extending portion E12. Note that the eleventh extending portion E11 has a wide rectangular shape. *
- the second element EL2 includes a fourth extending portion E4 extending in the same direction as the second extending portion E2 from the distal end of the second extending portion E2 via the second connecting portion C2, and the fourth extending portion E2.
- a fifth extending portion E5 extending in the direction along the third extending portion E3 from the tip of the existing portion E4 toward the antenna element AT. Further, the base end side of the fifth extending portion E5 facing the antenna element AT is a wide portion E5a formed wider than the tip end side.
- the third element EL3 includes a sixth extending portion E6 extending from the feeding point FP in the other direction along the ground surface GND, and a third extending in a direction away from the ground surface GND from the tip of the sixth extending portion E6.
- a seventh extension E7 extending through the connection portion C3, and an eighth extension extending in the direction along the ground plane GND from the tip of the seventh extension E7 toward the fourth extension E4 And E8.
- the sixth extending portion E6 extends from the feeding point FP to the other side in the direction along the ground plane GND, then extends in a direction away from the ground plane GND, and further to the other side in the direction along the ground plane GND.
- the base end portions (the first extending portion E1 and the sixth extending portion E6) of the first element EL1 and the third element EL3 extend separately from each other in the opposite direction from the feeding point FP.
- the eighth extending portion E8 has a first back surface pattern portion R1 connected to the front surface side via the through hole H and patterned on the back surface of the substrate body 2, and the first back surface pattern portion R1 is connected to the ground. It is formed wider toward the surface GND.
- the first back surface pattern portion R1 is connected to the front surface side eighth extending portion E8 by a through hole H on the end portion side of the substrate body 2.
- the fourth element EL4 includes a ninth extension portion E9 having a tip connected to the middle of the seventh extension portion E7 and extending in the same direction at a distance from the seventh extension portion E7. And a tenth extending portion E10 extending in a direction away from the seventh extending portion E7 from the tip of the ninth extending portion E9. Further, a thirteenth extending portion E13 extending in a direction away from the ground surface GND is connected to the proximal end side of the tenth extending portion E10.
- the thirteenth extending portion E13 has a second back surface pattern portion R2 connected to the front surface side through the through hole H and patterned on the back surface of the substrate body 2, and the second back surface pattern portion R2 is connected to the ground surface. It is formed wider toward the surface GND.
- the second back surface pattern portion R2 is connected to the thirteenth extending portion E13 on the front surface side through a through hole H on the end portion side of the substrate body 2.
- the antenna device substrate 1 has a first ground connection in which the base end is connected to the ground plane GND and the tip is connected to the base end side of the connection portion of the first element EL1 to the second element EL2.
- the base end of the portion G1 is spaced apart from the position where the first ground connection portion G1 is connected and is connected to the ground plane GND, and the tip is proximal to the connection portion of the third element EL3 to the fourth element EL4.
- the second ground connection part G2 connected to the side, the front end side from the connection part of the first ground connection part G1 of the first element EL1, and the front end side from the connection part of the second ground connection part G2 of the third element EL3 And a connection pattern L ⁇ b> 1 extending.
- an annular opening pattern portion S1 is formed between the connection pattern L1, the first element EL1, and the third element EL3 in the vicinity of the feeding point FP. That is, a part of the first extending portion E1 and the sixth extending portion E6 bent in a crank shape and the connection pattern L1 form a substantially rectangular opening pattern portion S1 that is long along the ground plane GND. Yes.
- the ground plane GND and the first element EL1 are directly connected only by the fifth passive element P5, and the fifth passive element P5 itself functions as the first ground connection portion G1.
- the ground plane GND and the third element EL3 are directly connected only by the sixth passive element P6, and the sixth passive element P6 itself functions as the second ground connection portion G2.
- the substrate body 2 is a general printed circuit board, and in this embodiment, a printed circuit board body made of a rectangular glass epoxy resin or the like is employed.
- substrate body 2 of this embodiment is a longitudinal direction: 110 mm, a transversal direction: 52 mm, and thickness: 1.0 mm.
- the dimensions of the antenna region (including a part of the ground plane GND below the fourth element EL4) in the board body 2 are 11 mm in the longitudinal direction of the board body 2 and 35 mm in the short direction of the board body 2.
- the feeding point FP is connected to a feeding point of a high-frequency circuit (not shown) through feeding means such as a coaxial cable.
- This power supply means includes various connectors such as a coaxial cable, a connector such as a receptacle, a connection structure in which the contact has a leaf spring shape, a connection structure in which the contact has a pin probe shape or a pin shape, and a connection structure using a soldering land.
- the structure can be adopted.
- the ground wire of the coaxial cable is connected to the base end side of the ground plane GND, and the core wire of the coaxial cable is connected to the feeding point FP.
- the antenna element AT is a loading element that does not self-resonate at a desired resonance frequency, and is a chip antenna in which a conductor pattern 102 such as Ag is formed on the surface of a dielectric 101 such as ceramic as shown in FIG. is there.
- a conductor pattern 102 such as Ag is formed on the surface of a dielectric 101 such as ceramic as shown in FIG. is there.
- elements having different lengths, widths, conductor patterns 102, and the like may be selected according to the setting of the resonance frequency or the like, or the same element may be selected.
- the dimensions of the antenna element AT of the present embodiment are a lateral width of 10.5 mm, a depth of 3.0 mm, and a height of 0.8 mm.
- the first passive element P1 to the sixth passive element P6 are, for example, inductors, capacitors, or resistors. *
- each element from the first element EL1 to the fourth element EL4 can generate a stray capacitance between adjacent elements and a stray capacitance between the ground plane GND. In addition, it extends with an interval from an adjacent element and the ground plane GND.
- the stray capacitance Ca between the twelfth extending portion E12 and the ground plane GND, and between the antenna element AT (third extending portion E3) and the twelfth extending portion E12.
- the stray capacitance Cb, the stray capacitance Cc between the antenna element AT and the fifth extension portion E5, the stray capacitance Cf between the third extension portion E3 and the fifth extension portion E5, and the fifth extension The stray capacitance Cg between the portion E5 and the eighth extension portion E8, and the stray capacitance between the opening pattern portion S1 (the first extension portion E1 and the sixth extension portion E6) and the eighth extension portion E8.
- a stray capacitance Ck between the existing portion E10 and the ground plane GND can be generated. Further, a capacitance component Cd due to the opening pattern portion S1 is also generated.
- the antenna device 10 of the present embodiment includes the antenna device substrate 1, and the first passive element P1, the second passive element P2, the third passive element P3, and the fourth passive element P4 are The first connection unit C1, the second connection unit C2, the third connection unit C3, and the fourth connection unit C4 are connected to each other.
- the first resonance frequency f1, the second resonance frequency f2, the third resonance frequency f3, and the fourth resonance frequency f4 are double-resonated. Is done.
- the first resonance frequency f1 is in a low frequency band (for example, 920 MHz band) of the four resonance frequencies, and the antenna element AT and the first element EL1 (first extension portion E1, second extension). Part E2, eleventh extending part E11 and twelfth extending part E12).
- the broadening of the bandwidth at the first resonance frequency f1 is determined by the length and width of the twelfth extending portion E12, the eleventh extending portion E11, and the third extending portion E3. Also, the impedance at the first resonance frequency f1 is determined by each of the stray capacitances Ca to Cd. Furthermore, the final adjustment of the first resonance frequency f1 can be flexibly adjusted using the first passive element P1.
- the first resonance frequency f1 is adjusted mainly at a portion surrounded by a broken line A1 in FIG.
- the resonance frequency and bandwidth are determined by setting the length and width of the first element EL1, the first passive element P1, the antenna element AT, and the stray capacitances.
- the impedance can be adjusted flexibly.
- the third resonance frequency f3 is determined by the lengths of the first extending portion E1, the second extending portion E2, the fourth extending portion E4, and the fifth extending portion. Further, the broadening of the bandwidth at the third resonance frequency f3 is determined by the lengths and widths of the first extending portion E1, the second extending portion E2, the fourth extending portion E4, and the fifth extending portion. Also, the impedance at the third resonance frequency f3 is determined by the stray capacitances Cd, Cc, Cf, and Cg. Furthermore, the final adjustment of the third resonance frequency f3 can be flexibly adjusted using the second passive element P2. *
- the third resonance frequency f3 is adjusted mainly at a portion surrounded by a one-dot chain line A3 in FIG.
- the length and width of the first extending portion E1, the second extending portion E2, and the second element EL2, the second passive element P2, and each of the stray capacitances described above are used. Therefore, the resonance frequency, bandwidth and impedance can be adjusted flexibly.
- the fourth resonance frequency f4 is determined by the lengths of the eighth extending portion E8 and the seventh extending portion E7. Further, the broadening of the bandwidth at the fourth resonance frequency f4 is determined by the length and width of the eighth extending portion E8 and the seventh extending portion E7. Also, the impedance at the fourth resonance frequency f4 is determined by the stray capacitances Cd, Cg, Ch, and Ci. Furthermore, the final adjustment of the fourth resonance frequency f4 can be flexibly adjusted using the third passive element P3. *
- the fourth resonance frequency f4 is adjusted mainly at a portion surrounded by a two-dot chain line A4 in FIG.
- the length and width of the third element EL3 (the seventh extending portion E7 and the eighth extending portion), the third passive element P3, and each of the stray capacitances described above Therefore, the resonance frequency, bandwidth and impedance can be adjusted flexibly.
- the second resonance frequency f2 is determined by the lengths of the seventh extending portion E7, the thirteenth extending portion E13, the tenth extending portion E10, and the ninth extending portion E9. Further, the broadening of the bandwidth at the second resonance frequency f2 is determined by the lengths and widths of the seventh extending portion E7, the thirteenth extending portion E13, the tenth extending portion E10, and the ninth extending portion E9. Also, the impedance at the second resonance frequency f2 is determined by the stray capacitances Cd, Ci, Cj, and Ck. Further, the final adjustment of the second resonance frequency f2 can be flexibly adjusted using the fourth passive element P4. *
- the second resonance frequency f2 is adjusted mainly at a portion surrounded by a broken line A2 in FIG.
- the length and width of the seventh extending portion E7, the thirteenth extending portion E13, the tenth extending portion E10, and the ninth extending portion E9, and the fourth passive frequency can be flexibly adjusted by setting the element P4 and each of the stray capacitances. It should be noted that final impedance adjustment can be flexibly performed using the fifth passive element P5 and the sixth passive element P6, which are impedance-adjusting passive elements, for each of the above resonance frequencies.
- the opening pattern portion S1 is provided in the vicinity of the feeding point FP, but the opening pattern portion S1 can effectively flow a high-frequency current from the feeding point FP to the left and right elements. That is, when there is no opening pattern portion S1, as shown in FIG. 6B, in the flow of the high-frequency current from the feeding point FP, the antenna element on the right side (the third element EL3 and the fourth element) The flow to EL4) is smooth, but the flow to the left side generates a capacitive component with the element from the feed point FP. Similarly, in the case of the wiring shown in FIG. 6C, the flow to the left side is smooth, but the flow to the right side generates a capacitance component with the element from the feeding point FP. *
- the high-frequency current to each element is Although there is no problem, the performance is increased due to the large area due to the mounting of components around the antenna. Especially, with the miniaturization and thinning, the distance from the peripheral parts becomes short, and further performance degradation occurs.
- the opening pattern portion S1 as in the present invention, the adverse effect from the capacitance component generated between the peripheral components due to the capacitance component in the opening pattern portion S1 is reduced.
- a high-frequency current flowing through each antenna element can be efficiently flowed, so that both miniaturization and high performance can be realized.
- the first back pattern portion R1 and the second back pattern portion R2 will be described.
- stray capacitance is generated on the front surface with respect to the sixth extending portion E6 and the opening pattern portion S1.
- the extending direction of the sixth extending portion E6 is effective depending on the thickness of the substrate body 2. In some cases, it may become impossible to use and interfere with the sixth extending portion E6.
- the impedance is lower than that of the sixth extending portion E6, and the influence of interference is small due to the capacitance component on the opening pattern portion S1 side. Therefore, it is effective to design the first back surface pattern portion R1 so that the width of the tenth extending portion E10 is the maximum width and extends from the end side of the substrate body 2 in the extending direction of the sixth extending portion E6.
- the second back surface pattern portion R2 in the same way as the first back surface pattern portion R1, maximizes the width of the thirteenth extending portion E13 and is directed from the end side of the substrate body 2 toward the twelfth extending portion E12. A design that extends to the top is effective. *
- the thirteenth extending portion E13 has a pattern arrangement orthogonal to the tenth extending portion E10.
- the eighth extending portion E8 is considered in consideration of the stray capacitance with the ground plane GND.
- the degree of freedom in design is reduced, such as the need to design stray capacitance between the two. For this reason, further miniaturization becomes difficult.
- the tenth extending portion E10 that uses the stray capacitance between the ground plane GND and the thirteenth extending portion E13 is arranged in a distribution pattern that uses the stray capacitance between the ground surface GND and the eighth extending portion E8.
- the ground plane GND can be arranged up to the vicinity of the tenth extending portion E10, and other components (button switch, microphone, FPC, etc.) used for the device can be mounted, and the device can be downsized. There is also an advantage that leads to. *
- the fifth extending portion E5 has a pattern arrangement using a stray capacitance with the antenna element AT. However, considering the overall size reduction, it is necessary to reduce the antenna area. The arrangement of the extending part E5 and the antenna element AT is important. As the fifth extending portion E5, designing a wide width is ideal because it leads to a wide band, but there are cases where it is difficult to achieve a reduction in size depending on the antenna region. Therefore, it is desirable that the width of the fifth extending portion E5 is designed to be narrow and designed to be close to the end of the substrate body 2. *
- the pattern width on the fifth extending portion E5 side of the portion where the stray capacitance Cf between the third extending portion E3 and the fifth extending portion E5 is generated is widened to be a wide portion E5a, thereby efficiently arranging the patterns. It is preferable that In consideration of the influence of the stray capacitance Cc between the antenna element AT and the fifth extending portion E5, the wide portion E5a is not a quadrilateral shape but a shape with a corner (triangular shape, trapezoidal shape). Thus, it is possible to control the high-frequency current flowing through the fifth extending portion E5 while effectively using the stray capacitance. *
- each element from the first element EL1 to the fourth element EL4 has a stray capacitance between adjacent elements and a stray capacitance between the ground plane GND. Since each of the elements extends to the adjacent element and the ground plane GND so as to be generated, the antenna element AT of the loading element that does not self-resonate at a desired resonance frequency and the stray capacitance between the elements are effective. By utilizing them, it is possible to make double resonance (2 to 4 resonances). *
- each resonance frequency can be flexibly adjusted by selecting the first to fourth passive elements P1 to P4 connected to the antenna element AT and the first to fourth connection parts C1 to C4 (changing constants, etc.).
- An antenna device 10 capable of 2 to 4 resonance according to the conditions can be obtained.
- each resonance frequency can be flexibly adjusted with one antenna device substrate 1 due to the antenna configuration, so that the resonance frequency can be changed, and the adjustment location by a passive element or the like can be changed according to the application or device. It has become.
- the design can be made in the plane of the substrate body 2, and the thickness can be reduced as compared with the case where a conventional dielectric block or resin molding is used, and the antenna element AT which is a dielectric antenna is selected.
- This also enables downsizing and higher performance. Further, there is no need for costs due to molds, design changes, etc., and low costs can be realized.
- the annular opening pattern portion S1 is formed between the connection pattern L1, the first element EL1, and the third element EL3 in the vicinity of the feeding point FP, the capacitance component Cd generated in the opening pattern portion S1 It is possible to reduce the adverse effect of the capacitive component generated between the peripheral components, and to achieve high performance for each element.
- the base end side of the fifth extending portion E5 facing the antenna element AT is a wide portion E5a formed wider than the tip end side, the wide portion without interfering with the antenna element AT. While securing E5a, stray capacitance between the fifth extending portion E5 and the third extending portion can be effectively generated by the wide portion E5a, so that the bandwidth and the size can be reduced. Further, since the thirteenth extending portion E13 extending in the direction away from the ground surface GND is connected to the proximal end side of the tenth extending portion E10, the thirteenth extending portion E13 and the seventh extending portion are connected.
- the stray capacitance Ci between E7 and the E7 can be generated, and the high-frequency current can be distributed also in the direction away from the ground plane GND by the thirteenth extending portion E13.
- a space is provided between the tenth extending portion E10 and the thirteenth extending portion E13, a space for fixing the board body 2 with screws can be secured in this region.
- the eighth extending portion E8 has a first back surface pattern portion R1 connected to the front surface side through the through hole H and patterned on the back surface of the substrate body 2, and the first back surface pattern portion R1 is Since it is formed wider toward the ground surface GND, it is possible to effectively generate a stray capacitance with the sixth extending portion E6 without interfering with the sixth extending portion E6. Further, since the first back surface pattern portion R1 is made wider toward the ground surface GND, the impedance is also lower than that of the sixth extending portion E6, and the opening pattern portion S1 (the first extending portion E1 and the eighth extending portion). The influence of interference can be reduced by the stray capacitance Ch with the existing part E8). *
- the thirteenth extending portion E13 has a second back surface pattern portion R2 connected to the front surface side through the through hole H and patterned on the back surface of the substrate body 2, and the second back surface pattern portion R2 is Since it is formed wider toward the ground plane GND, the stray capacitance between the ninth extension portion E9 and the stray capacitance between the ground plane GND due to the pattern arrangement with the twelfth extension portion E12 are effective. Can be generated. Therefore, by adopting the first back surface pattern portion R1 and the second back surface pattern portion R2, it is possible to achieve both higher performance and miniaturization of the antenna without increasing the antenna occupation area. *
- the impedance adjustment passive elements (the fifth passive element P5 and the sixth passive element P6) are connected to the first ground connection part G1 and the second ground connection part G2, respectively, the setting of the opening pattern part S1 and The impedance adjustment of each frequency band can be performed by setting two impedance adjusting passive elements. Therefore, in the antenna device 10 of the present embodiment, the first passive element P1, the second passive element P2, the third passive element P3, and the fourth passive element P4 correspond to the first connection part C1 and the second connection part C2, respectively. Since it is connected to the third connection part C3 and the fourth connection part C4, it is possible to achieve 2 to 4 resonances by simply selecting the first to fourth passive elements P1 to P4 as appropriate. Communication is possible at one to four resonance frequencies.
- Each passive element is composed of two first passive elements P1: 3.3 nH inductor and 10 nH inductor (total of 13 nH inductor), second passive element P2: 8.2 nH, third passive element P3: two inductors of 4.7 nH and 5.6 nH (total of 10 nH inductor), two fourth passive elements P4: two of 5.6 nH inductor and 12 nH of inductor (total 18 nH) Inductor) was used.
- the fifth passive element P5 uses a 0.5 pF capacitor
- the sixth passive element P6 uses an 8.2 nH inductor.
- the direction extending toward the ground plane GND in the extending direction of the second extending portion E2 is defined as the X direction
- the direction opposite to the extending direction of the third extending portion E3 is defined as the Y direction.
- the direction perpendicular to the surface of the substrate body 2 was taken as the Z direction. At this time, vertical polarization, horizontal polarization, and power gain with respect to the ZX plane were measured. *
- FIG. 8A shows a radiation pattern (ZX plane) at the first resonance frequency f1 in the 920 MHz band, and the average power gain is ⁇ 5.1 dBi.
- FIG. 8B is a radiation pattern (ZX plane) at the second resonance frequency f2 in the 1400 MHz band, and the average power gain is ⁇ 1.9 dBi.
- C in FIG. 8 is a radiation pattern (ZX plane) at the fourth resonance frequency f4 in the 1920 MHz band, and the average power gain was ⁇ 0.8 dBi. *
- the antenna element is provided in the first element, but the antenna element may be provided in other elements.
- the length of the element can be shortened by the antenna element, which is suitable when the area occupied by the antenna is small.
- the frequency band to be used can be flexibly changed and replaced.
- a maximum of four resonances are realized, but other than the lowest frequency band using an antenna element, it is possible to deal with two resonances or three resonances depending on the presence or absence of each passive element. Is possible. That is, any one or two of the second passive element, the third passive element, and the fourth passive element are connected to the corresponding second connection part, third connection part, and fourth connection part, respectively. It is possible to make two resonances or three resonances.
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- Details Of Aerials (AREA)
Abstract
Description
、干渉の影響も少なくできる。
ーン部S1が形成されている。すなわち、クランク状に屈曲した第1延在部E1及び第6延在部E6の一部と、連結パターンL1とで、グランド面GNDに沿って長い略四角形状の開口パターン部S1が構成されている。
、グランド面GNDとの間の浮遊容量を考慮して第8延在部E8との間の浮遊容量を設計する必要があるなど、設計の自由度が低下する。このため、更なる小型化が困難となる。
Claims (11)
- 絶縁性の基板本体と、 該基板本体にそれぞれ金属箔でパターン形成された第1エレメント、第2エレメント、第3エレメント、第4エレメント及びグランド面とを備え、 前記第1エレメントが、前記グランド面近傍の基端に給電点が設けられていると共に第1受動素子が接続可能な第1接続部と誘電体アンテナのアンテナ素子とをこの順で有して延在し、 前記第2エレメントが、基端が前記第1エレメントの前記給電点と前記第1接続部との間に接続され途中に第2受動素子が接続可能な第2接続部を有して延在し、 前記第3エレメントが、基端に前記給電点が接続されていると共に途中に第3受動素子が接続可能な第3接続部を有して延在し、 前記第4エレメントが、基端が前記第3エレメントの前記給電点と前記第3接続部との間に接続され途中に第4受動素子が接続可能な第4接続部を有して延在し、 前記第1エレメントから前記第4エレメントまでの各エレメントが、隣接するエレメント同士間の浮遊容量と、前記グランド面との間の浮遊容量とをそれぞれ発生可能に、隣接する前記エレメント及び前記グランド面に対して間隔を空けて延在していることを特徴とするアンテナ装置用基板。
- 請求項1に記載のアンテナ装置用基板において、 基端が前記グランド面に接続されていると共に先端が前記第1エレメントの前記第2エレメントとの接続部分よりも基端側に接続された第1グランド接続部と、 基端が前記第1グランド接続部が接続された位置から離間して前記グランド面に接続されていると共に先端が前記第3エレメントの前記第4エレメントとの接続部分よりも基端側に接続された第2グランド接続部と、 前記第1エレメントの前記第1グランド接続部の接続部分よりも先端側と前記第3エレメントの前記第2グランド接続部の接続部分よりも先端側とを連結して延在する連結パターンとを備え、 前記給電点の近傍に、前記連結パターンと前記第1エレメントと前記第3エレメントとの間で環状の開口パターン部が形成されていることを特徴とするアンテナ装置用基板。
- 請求項1に記載のアンテナ装置用基板において、 前記第1エレメントが、前記グランド面に沿った方向の一方に前記給電点から延びる第1延在部と、該第1延在部の先端から前記グランド面から離間する方向に延在する第2延在部と、該第2延在部の先端から前記第1接続部を介して前記グランド面に沿った方向へ延びて同方向に延在する前記アンテナ素子が接続された第3延在部とを有し、 前記第2エレメントが、前記第2延在部の先端から前記第2接続部を介して該第2延在部と同方向に延在した第4延在部と、該第4延在部の先端から前記アンテナ素子側へ前記第3延在部に沿った方向に延在する第5延在部とを有し、 前記第3エレメントが、前記グランド面に沿った方向の他方に前記給電点から延びる第6延在部と、該第6延在部の先端から前記グランド面から離間する方向に前記第3接続部を介して延在する第7延在部と、該第7延在部の先端から前記第4延在部に向けて前記グランド面に沿った方向へ延在する第8延在部とを有し、 前記第4エレメントが、前記第7延在部の途中に先端が接続されていると共に前記第7延在部から間隔を空けて同方向に延在した第9延在部と、該第9延在部の先端から前記第7延在部から離間する方向へ延在した第10延在部とを有していることを特徴とするアンテナ装置用基板。
- 請求項3に記載のアンテナ装置用基板において、 前記第5延在部の前記アンテナ素子に対向する部分よりも基端側が、先端側よりも幅広に形成された幅広部とされていることを特徴とするアンテナ装置用基板。
- 請求項3に記載のアンテナ装置用基板において、 前記第1エレメントが、前記第3延在部の先端から前記グランド面に向かって延びる第11延在部と、該第11延在部の先端から前記グランド面に沿って前記第1延在部に向かって延びる第12延在部とを有していることを特徴とするアンテナ装置用基板。
- 請求項3に記載のアンテナ装置用基板において、 前記第10延在部の基端側に、前記グランド面から離間する方向に延在する第13延在部が接続されていることを特徴とするアンテナ装置用基板。
- 請求項3に記載のアンテナ装置用基板において、 前記第8延在部が、スルーホールを介して表面側と接続され前記基板本体の裏面にパターン形成された第1裏面パターン部を有し、 該第1裏面パターン部が、前記グランド面に向かって幅広に形成されていることを特徴とするアンテナ装置用基板。
- 請求項6に記載のアンテナ装置用基板において、 前記第13延在部が、スルーホールを介して表面側と接続され前記基板本体の裏面にパターン形成された第2裏面パターン部を有し、 該第2裏面パターン部が、前記グランド面に向かって幅広に形成されていることを特徴とするアンテナ装置用基板。
- 請求項2に記載のアンテナ装置用基板において、 前記第1グランド接続部及び前記第2グランド接続部に、それぞれインピーダンス調整用受動素子が接続されていることを特徴とするアンテナ装置用基板。
- 請求項1に記載のアンテナ装置用基板を備え、 前記第1受動素子、前記第2受動素子、前記第3受動素子及び前記第4受動素子が、それぞれ対応する前記第1接続部、前記第2接続部、前記第3接続部及び前記第4接続部に接続されていることを特徴とするアンテナ装置。
- 請求項1に記載のアンテナ装置用基板を備え、 前記第1受動素子が、前記第1接続部に接続され、 前記第2受動素子,前記第3受動素子及び前記第4受動素子のいずれか一つ又は二つが、それぞれ対応する前記第2接続部,前記第3接続部及び前記第4接続部に接続されていることを特徴とするアンテナ装置。
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP13885195.1A EP3001502A4 (en) | 2013-05-20 | 2013-05-20 | Antenna device use board and antenna device |
| CN201380076269.1A CN105164856B (zh) | 2013-05-20 | 2013-05-20 | 天线装置用基板及天线装置 |
| KR1020157033010A KR101992517B1 (ko) | 2013-05-20 | 2013-05-20 | 안테나 장치용 기판 및 안테나 장치 |
| PCT/JP2013/003195 WO2014188467A1 (ja) | 2013-05-20 | 2013-05-20 | アンテナ装置用基板及びアンテナ装置 |
| HK16104208.2A HK1216565B (en) | 2013-05-20 | Antenna device use board and antenna device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2013/003195 WO2014188467A1 (ja) | 2013-05-20 | 2013-05-20 | アンテナ装置用基板及びアンテナ装置 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2014188467A1 true WO2014188467A1 (ja) | 2014-11-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2013/003195 Ceased WO2014188467A1 (ja) | 2013-05-20 | 2013-05-20 | アンテナ装置用基板及びアンテナ装置 |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3001502A4 (ja) |
| KR (1) | KR101992517B1 (ja) |
| CN (1) | CN105164856B (ja) |
| WO (1) | WO2014188467A1 (ja) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010081000A (ja) | 2008-09-24 | 2010-04-08 | Murata Mfg Co Ltd | 複合アンテナ |
| JP2010103841A (ja) * | 2008-10-24 | 2010-05-06 | Murata Mfg Co Ltd | アンテナ装置及び無線通信機 |
| JP2010166287A (ja) | 2009-01-15 | 2010-07-29 | Murata Mfg Co Ltd | アンテナ装置及び無線通信機 |
| JP2012142775A (ja) * | 2010-12-28 | 2012-07-26 | Mitsubishi Materials Corp | アンテナ装置用基板およびアンテナ装置 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005022688A1 (en) * | 2003-09-01 | 2005-03-10 | Matsushita Electric Industrial Co., Ltd. | Antenna module |
| ATE534165T1 (de) * | 2006-07-13 | 2011-12-15 | Murata Manufacturing Co | Drahtlose kommunikationsvorrichtung |
| JP5656108B2 (ja) * | 2010-10-15 | 2015-01-21 | 三菱マテリアル株式会社 | アンテナ装置用基板およびアンテナ装置 |
-
2013
- 2013-05-20 CN CN201380076269.1A patent/CN105164856B/zh not_active Expired - Fee Related
- 2013-05-20 KR KR1020157033010A patent/KR101992517B1/ko not_active Expired - Fee Related
- 2013-05-20 WO PCT/JP2013/003195 patent/WO2014188467A1/ja not_active Ceased
- 2013-05-20 EP EP13885195.1A patent/EP3001502A4/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010081000A (ja) | 2008-09-24 | 2010-04-08 | Murata Mfg Co Ltd | 複合アンテナ |
| JP2010103841A (ja) * | 2008-10-24 | 2010-05-06 | Murata Mfg Co Ltd | アンテナ装置及び無線通信機 |
| JP2010166287A (ja) | 2009-01-15 | 2010-07-29 | Murata Mfg Co Ltd | アンテナ装置及び無線通信機 |
| JP2012142775A (ja) * | 2010-12-28 | 2012-07-26 | Mitsubishi Materials Corp | アンテナ装置用基板およびアンテナ装置 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP3001502A4 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105164856A (zh) | 2015-12-16 |
| CN105164856B (zh) | 2017-12-15 |
| KR20160009568A (ko) | 2016-01-26 |
| EP3001502A1 (en) | 2016-03-30 |
| EP3001502A4 (en) | 2017-01-18 |
| KR101992517B1 (ko) | 2019-06-24 |
| HK1216565A1 (zh) | 2016-11-18 |
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