WO2021085055A1 - アンテナ装置およびそれを備えた無線通信デバイス - Google Patents
アンテナ装置およびそれを備えた無線通信デバイス Download PDFInfo
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- WO2021085055A1 WO2021085055A1 PCT/JP2020/037890 JP2020037890W WO2021085055A1 WO 2021085055 A1 WO2021085055 A1 WO 2021085055A1 JP 2020037890 W JP2020037890 W JP 2020037890W WO 2021085055 A1 WO2021085055 A1 WO 2021085055A1
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- antenna
- conductor
- antenna conductor
- antenna device
- tip edge
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
- H01Q9/40—Element having extended radiating surface
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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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
- H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
-
- 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
- H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
- H01Q5/25—Ultra-wideband [UWB] systems, e.g. multiple resonance systems; Pulse systems
-
- 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
- H01Q5/321—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 within a radiating element or between connected radiating elements
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
- H01Q9/0421—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with a shorting wall or a shorting pin at one end of the element
Definitions
- the present invention relates to an antenna device and a wireless communication device including the antenna device.
- Patent Document 1 discloses a bowtie antenna that has been miniaturized while maintaining wideband characteristics.
- the bowtie antenna has a wideband characteristic because each of the pair of antenna conductors has a shape that extends in the direction away from the feeding point and widens as the distance from the feeding point increases.
- a miniaturized antenna device that communicates in the first frequency band of a wide band can be used in another second frequency band, that is, can support a dual band.
- the second frequency band is a frequency band lower than the first frequency band, it is necessary to increase the antenna length in order to correspond to the second frequency band. As a result, the antenna device becomes large.
- an object of the present invention is to enable an antenna device that communicates in a high frequency band in a wide band to communicate in a low frequency band while suppressing an increase in size.
- Feeding point and A first antenna conductor extending from the feeding point in a direction away from the ground conductor and widening as the distance from the feeding point increases.
- a first connecting portion that connects the tip edge of the first antenna conductor and the second antenna conductor via a capacitor, and It has a second connecting portion that connects the tip edge of the first antenna conductor and the second antenna conductor via an inductor or a zero ohm resistor.
- the first connection point between the first connection portion and the first antenna conductor is the first connection point as compared with the second connection point between the second connection portion and the first antenna conductor.
- An antenna device is provided that is close to the center of the tip edge of the antenna conductor.
- a wireless communication device including a feeding circuit for feeding power to a feeding point of the antenna device is provided.
- an antenna device that communicates in a high frequency band in a wide band to communicate in a low frequency band while suppressing an increase in size.
- FIG. 1 Top view of a wireless communication device including the antenna device according to the first embodiment of the present invention.
- Partial enlarged view of wireless communication device Partial enlarged view of a wireless communication device including an antenna device of a comparative example The figure which shows the frequency characteristic (matched) of the return loss of each of the antenna device which concerns on Embodiment 1 (Example 1) and the antenna device of a comparative example.
- Partial enlarged view of a wireless communication device including the antenna device according to the third embodiment of the present invention The figure which shows the relationship between the inductance value of the inductor arranged between the short conductor and the ground conductor, and between the short conductor and the first antenna conductor, and the bandwidth of a frequency band.
- Partial enlarged view of a wireless communication device including the antenna device according to the fourth embodiment of the present invention Partial enlarged view of a wireless communication device including the antenna device according to the fifth embodiment of the present invention.
- Partial enlarged view of a wireless communication device including the antenna device according to the sixth embodiment of the present invention Partial enlarged view of a wireless communication device including the antenna device according to the seventh embodiment of the present invention.
- Partial enlarged view of the wireless communication device including the antenna device according to the eighth embodiment of the present invention Partial enlarged view of a wireless communication device including the antenna device according to the ninth embodiment of the present invention. Partial enlarged view of the wireless communication device including the antenna device according to the tenth embodiment of the present invention.
- the antenna device of one aspect of the present invention includes a feeding point, a first antenna conductor extending from the feeding point in a direction away from the ground conductor, and widening as the distance from the feeding point increases, and the first antenna.
- a second connecting portion that connects the tip edge of the first antenna conductor and the second antenna conductor via an inductor or a zero ohm resistor, and the first connecting portion and the first The first connection point with the antenna conductor is closer to the center of the tip edge of the first antenna conductor than the second connection point between the second connection portion and the first antenna conductor.
- an antenna device that communicates in a high frequency band in a wide band to communicate in a low frequency band while suppressing an increase in size.
- the first connection point may be located at the center of the tip edge of the first antenna conductor, and the second connection point may be located at one end of the tip edge of the first antenna conductor. You may.
- the antenna device may further have a ground conductor connected to the feeding point.
- the first antenna conductor extends in a direction away from the ground conductor.
- the antenna device may further have a short conductor having one end connected to the first antenna conductor and the other end connected to the ground conductor.
- the third connection point between the short conductor and the first antenna conductor is closer to the second connection point than the first connection point.
- one end of the short conductor may be connected to the first antenna conductor via an inductor, and the other end of the short conductor may be connected to the ground conductor via an inductor.
- the width of the second antenna conductor may be equal to or larger than the length of the tip edge.
- the first antenna conductor may have a triangular shape with the tip edge as the base, and the second antenna conductor may have a rectangular shape.
- the first antenna conductor may have a triangular shape in which the lengths of the two hypotenuses are different.
- the wireless communication device of another aspect of the present invention includes the antenna device and a power feeding circuit that supplies power to the feeding point of the antenna device.
- an antenna device that communicates in a high frequency band in a wide band to communicate in a low frequency band while suppressing an increase in size.
- FIG. 1 is a top view of a wireless communication device including the antenna device according to the first embodiment of the present invention. Further, FIG. 2 is a partially enlarged view of the wireless communication device.
- the XYZ Cartesian coordinate system shown in the figure is for facilitating the understanding of the present invention, and does not limit the invention. Further, in the present specification, the X-axis direction is the width direction and the Y-axis direction is the length direction.
- the wireless communication device 50 including the antenna device 10 according to the first embodiment is mounted on an electronic device capable of wireless communication and used.
- the antenna device 10 is a dual band compatible antenna device capable of communicating with a frequency in a relatively high frequency band (HB band) and a frequency in a relatively low frequency band (LB band).
- the high frequency band is the 5 GHz band (for example, 5.15 to 5.85 GHz)
- the low frequency band is the 2.4 GHz band (for example, 2.4 to 2.484 GHz). ..
- the high frequency band has a wider band than the low frequency band.
- the antenna device 10 is provided on the ground conductor 12 provided on the base substrate 52 of the wireless communication device 50 and on the ground conductor 12 provided on the base substrate 52. It has first and second antenna conductors 14 and 16 connected, and first and second connecting portions 18 and 20 connecting the first and second antenna conductors 14 and 16.
- the antenna device 10 has a feeding point 22 and a matching circuit 24 provided between the ground conductor 12 and the first antenna conductor 14.
- a power supply circuit (not shown) provided in the wireless communication device 50 is connected to the power supply point 22.
- the antenna device 10 is fed from the feeding circuit via the feeding point 22.
- the matching circuit 24 is, for example, an LC resonance circuit including a chip inductor and a chip capacitor.
- the ground conductor 12 of the antenna device 10 has a rectangular shape and is a conductor pattern such as copper formed on a base substrate 52 made of an insulating material.
- the first antenna conductor 14 and the second antenna conductor 16 of the antenna device 10 are conductor patterns such as copper formed on the base substrate 52.
- the first antenna conductor 14 has a shape extending from the feeding point 22 in a direction away from the ground conductor 12 (Y-axis direction), and the width (size in the X-axis direction) increases as the distance from the feeding point 22 increases.
- the first antenna conductor 14 extends from the feeding point 22 in the length direction (Y-axis direction) so as to be separated from the edge 12a of the ground conductor 12 provided with the feeding point 22. Further, the width (size in the X-axis direction) linearly increases as the distance from the feeding point 22 increases, that is, as the distance from the feeding point 22 approaches the tip edge 14a, which is the edge of the distal end far from the feeding point 22.
- the first antenna conductor 14 has a triangular shape having the tip edge 14a as the base and the remaining two hypotenuses 14b and 14c having different lengths. Further, the tip edge 14a of the first antenna conductor 14 is linear and extends in the width direction (X-axis direction) in a state parallel to the edge 12a of the ground conductor 12.
- the second antenna conductor 16 is provided so as to face the tip edge 14a of the first antenna conductor 14 at a distance.
- the second antenna conductor 16 is arranged to face the tip edge 14a of the first antenna conductor 14 at intervals in the length direction (Y-axis direction). Further, in the case of the first embodiment, the second antenna conductor 16 has a length (size in the X-axis direction) equal to the length of the tip edge 14a of the first antenna conductor 14. It has a rectangular shape extending in the direction (Y-axis direction). The length (size in the Y-axis direction) of the rectangular second antenna conductor 16 is smaller than the width (size in the X-axis direction).
- the first connecting portion 18 connects the first antenna conductor 14 and the second antenna conductor 16 via a capacitor.
- the first connecting portion 18 connects the first antenna conductor 14 and the second antenna conductor 16 via a chip capacitor 26 having a desired capacitance.
- a protruding portion protruding from the first antenna conductor 14 toward the second antenna conductor 16 and a protruding portion protruding from the second antenna conductor 16 toward the first antenna conductor 14.
- a capacitor may be formed in the gap between the two.
- the second connecting portion 20 connects the first antenna conductor 14 and the second antenna conductor 16 via an inductor.
- the second connecting portion 20 connects the first antenna conductor 14 and the second antenna conductor 16 via a chip inductor 28 having a desired inductance.
- the first antenna conductor 14 and the second antenna conductor 16 may be connected via a conductor pattern having a shape having a desired inductance (for example, a meander shape).
- the second connecting portion 20 may connect the first antenna conductor 14 and the second antenna conductor 16 via a zero ohm resistor.
- connection point (first connection point) 18a between the first connection portion 18 and the first antenna conductor is the second connection portion 20 and the first connection portion 20a.
- connection point (second connection point) 20a with the antenna conductor Has been done.
- connection point 18a between the first connection portion 18 and the first antenna conductor 14 is located at the center of the tip edge 14a of the first antenna conductor 14.
- connection point 20a between the second connecting portion 20 and the first antenna conductor 14 is located at one end of the tip edge 14a of the first antenna conductor 14.
- the current I HB is the first from the feeding point 22 toward the first connecting portion 18. It flows through the center of the width of the antenna conductor 14 of 1, then flows through the first connecting portion 18, and flows through the second antenna conductor 16 in its length direction (Y-axis direction).
- This current path is because a relatively high frequency current flows more easily in the capacitor (chip capacitor 26) of the first connection portion 18 than in the inductor (chip inductor 28) of the second connection portion 20. Occurs in.
- the path length of this current I HB substantially corresponds to 1/4 of the wavelength of the frequency in the high frequency band.
- the current I LB flows from the feeding point 22 toward the second connecting portion 20 along the oblique side 14b of the first antenna conductor 14. Next, it flows through the second connecting portion 20, and then flows through the second antenna conductor 16 in the width direction (X-axis direction) thereof.
- This current path is because a relatively low frequency current flows more easily in the inductor (chip inductor 28) of the second connection portion 20 than in the capacitor (chip capacitor 26) of the first connection portion 18. Occurs in.
- the path length of this current I LB substantially corresponds to 1/4 of the wavelength of the frequency in the low frequency band.
- Table 1 shows the efficiency of the antenna device 10 according to the first embodiment.
- Table 1 shows the band average efficiency in the frequency band (LB band) of 2.4 to 2.484 GHz and the frequency of 5.15 to 5.85 GHz in the antenna device 10 (Example 1) according to the first embodiment.
- the band average efficiency in the band (HB band) is shown.
- the installation areas of the first and second antenna conductors 14 and 16 in the antenna device 10 of the first embodiment are areas having a length L1 of 9.5 mm and a width W1 of 11.5 mm. Is.
- the length L2 of the base substrate is 35 mm and the width W2 is 25 mm.
- the capacitor of the chip capacitor 26 of the first connection portion 18 is 0.1 pF
- the inductance of the chip inductor 28 of the second connection portion 20 is 1.1 nH.
- Table 1 shows the band average efficiency in the LB band and the band average efficiency in the HB band in the antenna device of the comparative example.
- FIG. 3 is a partially enlarged view of a wireless communication device including an antenna device of a comparative example.
- the antenna device 110 in the wireless communication device 150 of the comparative example has a triangular antenna conductor 114 whose width becomes wider as the distance from the feeding point 122 increases.
- the installation area of the antenna conductor 114 is substantially the same as the installation area of the first and second antenna conductors 14 and 16 in the antenna device 10 according to the first embodiment (Example 1).
- the antenna device 110 of the comparative example includes a matching circuit 124 that matches the feeding point 122 and the antenna conductor 114 in the same low frequency band LB and high frequency band HB as the antenna device 10 of the first embodiment.
- FIG. 4 shows the frequency characteristics (matched) of the return loss of each of the antenna device according to the first embodiment (Example 1) and the antenna device of the comparative example.
- both the antenna device 10 of Example 1 broken line
- the antenna device 110 of Comparative Example solid line
- LB low frequency band
- HB high frequency band
- the antenna device 110 of the comparative example has a high average efficiency value of ⁇ 1.0 dB (practical level) in the high frequency band HB, and has good efficiency.
- the average efficiency value is -2.2 dB, which is not preferable.
- the antenna device 10 of the first embodiment has high efficiency in both the high frequency band HB and the low frequency band LB.
- the antenna conductor 114 of the comparative example capable of communicating in a high frequency band in a wide band is divided into a first antenna conductor 14 and a second antenna conductor 16 as in the first embodiment, and these are divided into the first and second antenna conductors. If the antenna conductors are connected by the connecting portions 18 and 20, good efficiency can be obtained in both the high frequency band and the low frequency band without substantially expanding the installation area of the antenna conductor.
- the first embodiment it is possible to enable an antenna device that communicates in a high frequency band in a wide band to communicate in a low frequency band while suppressing an increase in size.
- FIG. 5 is a partially enlarged view of a wireless communication device including the antenna device according to the second embodiment of the present invention.
- the first antenna conductor 14 is connected to the ground conductor 12 via the feeding point 22. It is connected to the ground conductor 12 via the short conductor 230. That is, the first antenna conductor 14 is short-circuited to the ground conductor 12 via the short conductor 230.
- the short conductor 230 is a conductor having one end connected to the first antenna conductor 14 and the other end connected to the ground conductor 12.
- the connection point (third connection point) 230a between the short conductor 230 and the first antenna conductor 14 is a connection point (first connection point) between the first connection portion 18 and the first antenna conductor 14. It is far from 18a and close to the connection point (second connection point) 20a between the second connection portion 20 and the first antenna conductor 14. That is, in the case of the second embodiment, the ground conductor 12, the first antenna conductor 14, and the short conductor 230 are integrated as one component (for example, one conductor pattern). It is preferable that the connection point 20a and the connection point 230a are close to each other as in the second embodiment.
- FIG. 6 shows the frequency characteristics (matched) of the return loss of each of the antenna device according to the first embodiment (Example 1) and the antenna device according to the second embodiment (Example 2).
- the bandwidth of the low frequency band is substantially doubled when the return loss is 10 dB or more, which is a practical level.
- the antenna device 10 of the above-described first embodiment (Example 1) functions as a monopole antenna at a low frequency band
- the antenna device 10 of the second embodiment has a function as a monopole antenna.
- the antenna device 210 functions as an inverted F antenna.
- the efficiency does not change significantly even if the bandwidth of the low frequency band is expanded. Also in the second embodiment (Example 2), good efficiency can be obtained in both the high frequency band and the low frequency band as in the above-described first embodiment (Example 1).
- the short conductor 230 is arranged so as to extend along the edge 52a of the base substrate 52 made of the insulating material. Due to such an arrangement of the short conductor 230, in the case of a low frequency band, a current easily flows through the portion of the ground conductor 12 along the edge 52a of the base substrate 52. As a result, the bandwidth is expanded and the efficiency is increased in the low frequency band as compared with the case where the short conductor 230 is provided at a position away from the edge 52a of the base substrate 52.
- the antenna device that communicates in the high frequency band of the wide band can communicate in the low frequency band while suppressing the increase in size. Can be done. In addition, the bandwidth of the low frequency band can be expanded.
- the third embodiment is an improved form of the second embodiment described above. Therefore, the third embodiment will be described with a focus on the differences from the second embodiment.
- the components of the third embodiment, which are substantially the same as the components of the second embodiment described above, are designated by the same reference numerals.
- FIG. 7 is a partially enlarged view of a wireless communication device including the antenna device according to the third embodiment of the present invention.
- the first antenna conductor 14 is short-circuited to the ground conductor 12 via the short conductor 330.
- the short conductor 330 is another conductor independent of the ground conductor 12 and the first antenna conductor 14. Therefore, one end of the short conductor 330 is connected to the first antenna conductor 14 via an inductor, for example, a chip inductor 332, and the other end is also connected to the ground conductor 12 via a chip inductor 332.
- the chip inductor 332 between the short conductor 330 and the ground conductor 12 and the chip inductor 332 between the short conductor 330 and the first antenna conductor 14 have the same inductance.
- the two chip inductors 332 may have different inductances.
- FIG. 8 is a diagram showing the relationship between the inductance value of the inductor arranged between the short conductor and the ground conductor and between the short conductor and the first antenna conductor and the bandwidth of the frequency band.
- the inductance of the chip inductor 332 increases, the bandwidth of the high frequency band (HB band) expands. Therefore, by adjusting the inductance of the chip inductor 332, the high frequency band can be made into a desired bandwidth.
- one end and the other end of the short conductor 330 are changed to a width different from the portion between the one end and the other end, that is, the short conductor 330 is formed in a shape having a desired inductance and grounded. It may be connected to the conductor 12 and the first antenna conductor 14.
- the antenna device that communicates in the high frequency band of the wide band can communicate in the low frequency band while suppressing the increase in size. Can be done.
- the bandwidth of the low frequency band can be expanded.
- the bandwidth of high frequency bands can be expanded.
- the second antenna conductor 16 has a rectangular shape. Specifically, the second antenna conductor 16 extends in the length direction (Y-axis direction) with a constant width (size in the X-axis direction), and has a length (size in the Y-axis direction). ) Is a rectangular shape that is smaller than the width. The width thereof is the same as the length of the tip edge 14a of the first antenna conductor 14. However, the embodiment of the present invention does not limit the shape of the second antenna conductor to a rectangular shape.
- 9 to 13 are partially enlarged views of a wireless communication device including the antenna device according to the fourth to eighth embodiments of the present invention.
- the second antenna conductor 416 in the antenna device 410 of the wireless communication device 450 has a length as it is separated from the second connecting portion 20 in the width direction (X-axis direction). It has a shape that increases (size in the Y-axis direction).
- the width (size in the X-axis direction) of the second antenna conductor 416 is the same as the length of the tip edge 14a of the first antenna conductor 14.
- the second antenna conductor 516 in the antenna device 510 of the wireless communication device 550 has a length (size in the Y-axis direction) in the width direction (X-axis direction). ) Has a shape in which the center is larger than both ends.
- the trailing edge 516a of the second antenna conductor 516 facing the tip edge 14a of the first antenna conductor 14 is linear and parallel to the tip edge 14a.
- the width (size in the X-axis direction) of the second antenna conductor 516 is the same as the length of the tip edge 14a of the first antenna conductor 14.
- the second antenna conductor 616 in the antenna device 610 of the wireless communication device 650 has a length (size in the Y-axis direction) in the width direction (X-axis direction). ) Has a shape in which the center is smaller than both ends.
- the tip edge 616b opposite to the trailing edge 616a of the second antenna conductor 616 facing the tip edge 14a of the first antenna conductor 14 is linear and the tip of the first antenna conductor 14 It is parallel to the edge 14a.
- the width (size in the X-axis direction) of the second antenna conductor 616 is the same as the length of the tip edge 14a of the first antenna conductor 14.
- the antenna devices that communicate in the high frequency band of the wide band can be made capable of communicating in the low frequency band while suppressing the increase in size in the above-described embodiments 4 to 6 as well. ..
- the trailing edge 716a and the tip edge 716b are parallel to each other, It has a trapezoidal shape in which the length of the tip edge 716b is larger than the length of the edge edge 716a.
- the length of the trailing edge 716a is larger than that of the tip edge 14a of the first antenna conductor 14.
- the seventh embodiment can also enable the antenna device that communicates in the high frequency band of the wide band to communicate in the low frequency band while suppressing the increase in size.
- the bandwidth of high frequency bands can be expanded.
- the second antenna conductor 816 in the antenna device 810 of the wireless communication device 850 according to the eighth embodiment has a rear end edge 816a and a tip edge 816b.
- the lengths of the trailing edge 816a and the tip edge 816b are smaller than the length of the tip edge 14a of the first antenna conductor 14.
- the antenna device that communicates in a high frequency band in a wide band can be made capable of communicating in a low frequency band while suppressing the increase in size.
- the first antenna conductor 14 has a triangular shape with the tip edge 14a as the base.
- the embodiment of the present invention does not limit the shape of the first antenna conductor to a triangular shape.
- FIG. 14 and 15 are partially enlarged views of a wireless communication device including the antenna device according to the ninth and tenth embodiments of the present invention, respectively.
- the first antenna conductor 914 in the antenna device 910 of the wireless communication device 950 extends from the feeding point 22 in a direction away from the ground conductor 12 (Y-axis direction). However, it has a shape in which the width (size in the X-axis direction) expands quadratically as the distance from the feeding point 22 increases, that is, a so-called bowl shape.
- the first antenna conductor 1014 in the antenna device 1010 of the wireless communication device 1050 according to the tenth embodiment is separated from the ground conductor 12 in the direction away from the ground conductor 12 (Y-axis direction) from the feeding point 22. It has a so-called trapezoidal shape that extends linearly and widens linearly in width (size in the X-axis direction) as the distance from the feeding point 22 increases.
- the antenna device that communicates in a high frequency band in a wide band can be made capable of communicating in a low frequency band while suppressing the increase in size.
- the first antenna conductor 14 extends from the feeding point 22 in the direction away from the ground conductor 12.
- the embodiments of the present invention are not limited to this.
- the first antenna conductor may extend from the feeding point while another antenna conductor may extend from the feeding point in the opposite direction.
- the antenna device is a first antenna that extends from the feeding point in a direction away from the feeding point and the ground conductor, and widens as the distance from the feeding point increases.
- the first connection point between the connection portion and the first antenna conductor is the first connection point of the first antenna conductor as compared with the second connection point between the second connection portion and the first antenna conductor. It is an antenna device near the center of the tip edge.
- the present invention is applicable to a dual band compatible antenna device.
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Abstract
Description
給電点と、
前記グランド導体から離れる方向に前記給電点から延在し、前記給電点から遠ざかるほど幅が広がる第1のアンテナ導体と、
前記第1のアンテナ導体の先端縁に対して間隔をあけて対向する第2のアンテナ導体と、
前記第1のアンテナ導体の先端縁と前記第2のアンテナ導体とをキャパシタを介して接続する第1の接続部と、
前記第1のアンテナ導体の先端縁と前記第2のアンテナ導体とをインダクタまたはゼロオーム抵抗を介して接続する第2の接続部と、を有し、
前記第1の接続部と前記第1のアンテナ導体との第1の接続点が、前記第2の接続部と前記第1のアンテナ導体との第2の接続点に比べて、前記第1のアンテナ導体の先端縁の中央に近い、アンテナ装置が提供される。
上述のアンテナ装置と、
前記アンテナ装置の給電点に給電する給電回路と、を含む無線通信デバイスが提供される。
図1は、本発明の実施の形態1に係るアンテナ装置を備える無線通信デバイスの上面図である。また、図2は、無線通信デバイスの部分拡大図である。なお、図に示すX-Y-Z直交座標系は本発明の理解を容易にするためのものであって、発明を限定するものではない。また、本明細書では、X軸方向は幅方向であって、Y軸方向は長さ方向である。
本実施の形態2は、上述の実施の形態1の改良形態である。したがって、上述の実施の形態1と異なる点を中心に、本実施の形態2について説明する。なお、上述の実施の形態1の構成要素と実質的に同一である本実施の形態2の構成要素には、同一の符号が付されている。
本実施の形態3は、上述の実施の形態2の改良形態である。したがって、上述の実施の形態2と異なる点を中心に、本実施の形態3について説明する。なお、上述の実施の形態2の構成要素と実質的に同一である本実施の形態3の構成要素には、同一の符号が付されている。
Claims (9)
- 給電点と、
前記給電点から延在し、前記給電点から遠ざかるほど幅が広がる第1のアンテナ導体と、
前記第1のアンテナ導体の先端縁に対して間隔をあけて対向する第2のアンテナ導体と、
前記第1のアンテナ導体の先端縁と前記第2のアンテナ導体とをキャパシタを介して接続する第1の接続部と、
前記第1のアンテナ導体の先端縁と前記第2のアンテナ導体とをインダクタまたはゼロオーム抵抗を介して接続する第2の接続部と、を有し、
前記第1の接続部と前記第1のアンテナ導体との第1の接続点が、前記第2の接続部と前記第1のアンテナ導体との第2の接続点に比べて、前記第1のアンテナ導体の先端縁の中央に近い、アンテナ装置。
- 前記第1の接続点が、前記第1のアンテナ導体の先端縁の中央に位置し、
前記第2の接続点が、前記第1のアンテナ導体の先端縁の一方の端に位置する、請求項1に記載のアンテナ装置。
- 前記給電点に接続されたグランド導体を、さらに有し、
前記第1のアンテナ導体が、前記グランド導体から離れる方向に延在する、請求項1または2に記載のアンテナ装置。
- 一端が前記第1のアンテナ導体に接続され、他端が前記グランド導体に接続されているショート導体を、さらに有し、
前記ショート導体と前記第1のアンテナ導体との第3の接続点が、前記第1の接続点よりも前記第2の接続点に近い、請求項3に記載のアンテナ装置。
- 前記ショート導体の一端が、インダクタを介して前記第1のアンテナ導体に接続され、
前記ショート導体の他端が、インダクタを介して前記グランド導体に接続されている、請求項4に記載のアンテナ装置。
- 前記第2のアンテナ導体の幅が、前記先端縁の長さに対して等しいまたは大きい、請求項1から5のいずれか一項に記載のアンテナ装置。
- 前記第1のアンテナ導体が、前記先端縁を底辺とする三角形状であって、
前記第2のアンテナ導体が、矩形状である、請求項1から6のいずれか一項に記載のアンテナ装置。
- 前記第1のアンテナ導体が、2つの斜辺の長さが異なる三角形状である、請求項7に記載のアンテナ装置。
- 請求項1から8のいずれか一項に記載のアンテナ装置と、
前記アンテナ装置の給電点に給電する給電回路と、を含む無線通信デバイス。
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| JP2021554244A JP7342966B2 (ja) | 2019-10-30 | 2020-10-06 | アンテナ装置およびそれを備えた無線通信デバイス |
| CN202080075474.6A CN114667642B (zh) | 2019-10-30 | 2020-10-06 | 天线装置和具备该天线装置的无线通信器件 |
| US17/657,367 US12051862B2 (en) | 2019-10-30 | 2022-03-31 | Antenna unit and wireless communication device including the same |
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| JP2019-197528 | 2019-10-30 | ||
| JP2019197528 | 2019-10-30 |
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| US17/657,367 Continuation US12051862B2 (en) | 2019-10-30 | 2022-03-31 | Antenna unit and wireless communication device including the same |
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| US12506282B2 (en) * | 2022-11-24 | 2025-12-23 | Murata Manufacturing Co., Ltd. | Antenna device |
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Also Published As
| Publication number | Publication date |
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| JP7342966B2 (ja) | 2023-09-12 |
| US20220224015A1 (en) | 2022-07-14 |
| CN114667642B (zh) | 2025-05-06 |
| JPWO2021085055A1 (ja) | 2021-05-06 |
| US12051862B2 (en) | 2024-07-30 |
| CN114667642A (zh) | 2022-06-24 |
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