WO2018171228A1 - Wideband balun five-section cascade coupling line structure - Google Patents

Abstract

The present invention provides a wideband balun five-section cascade coupling line structure. The five-section cascade coupling line structure comprises a first isolation resistor, a second isolation resistor, a third isolation resistor, a fourth isolation resistor, a first metal sheet, a second metal sheet, a third metal sheet, a fourth metal sheet, a fifth metal sheet, a sixth metal sheet, a first base, and a second base. By implementing the present invention, a phase difference between adjacent output ports can be kept stable around 180°, achieving a good phase shift effect between two output ports.

Description

 Five-section cascade coupling line structure in broadband balun

 [0001] The present invention relates to the field of communications technologies, and in particular, to a five-segment cascaded line structure in a broadband balun.

 Background technique

 [0002] Various passive interconnect structures known to convert between single-ended signals and differential signals are often referred to as "baluns" in germanium applications and/or are often referred to in frequency domain applications. "180° hybrid". The wideband DC-coupled passive balun is limited by a loss of at least 3 dB because there is no energy on the DC that can be coupled to a capacitive or inductive coupling to the "reverse" output, and thus half of the single-ended input power behaves as a differential The "wasted" common mode energy on the output.

 [0003] Typically, baluns are designed for RF applications with little or no consideration for the transient response of the balun. The transient response in such devices can have considerable pre-shoot or pre-shoot and over shoot. However, in some applications, such as in signal acquisition systems with differential signal acquisition probes coupled to an oscilloscope, the antenna design of the existing balun design does not use a multi-section gradient structure, resulting in a balun structure design. The phase difference between adjacent ports is unstable, and the phase shifting effect is poor, which reduces the stability of the communication signal and is not conducive to signal transmission between communication devices.

 technical problem

 [0004] The main object of the present invention is to provide a five-segment cascade coupling line structure in a broadband balun, which aims to solve the problem that the prior art balun design does not adopt a multi-section gradient design to cause phase between adjacent ports. A technical problem in which the difference is unstable and the phase shifting effect is poor.

 Problem solution

 Technical solution

 [0005] In order to achieve the above object, the present invention provides a five-section cascade coupling line structure in a broadband balun, the five-section cascade coupling line structure including a first isolation resistor, a second isolation resistor, and a third isolation. Resistance, fourth isolation resistance, first metal piece, second metal piece, third metal piece, fourth metal piece, fifth piece metal piece, sixth piece metal piece, first base and second base ;

[0006] The first metal piece is a rectangular solid structure, the second metal piece, the third metal piece, the first The four-section metal piece, the fifth-section metal piece, and the sixth-section metal piece are both rectangular and have a structure inside the slit;

[0007] The bottom of the first metal piece is connected to the middle of the top of the second metal piece, and the bottom of the second metal piece is connected to the middle of the top of the third metal piece, the third piece of metal piece The bottom is connected to the middle of the top of the fourth metal piece, the bottom of the fourth metal piece is connected to the middle of the top of the fifth metal piece, and the bottom of the fifth metal piece is connected to the sixth piece of metal piece. Middle position of the top

[0008] a first base is disposed on a left side of the sixth metal piece, and a second base is disposed on a right side of the sixth metal piece; and [0009] the first isolation resistor is disposed in a gap of the second metal piece The second isolation resistor is disposed in the slit of the third metal piece, the third isolation resistor is disposed in the slit of the fourth metal piece, and the fourth isolation resistance is disposed in the gap of the fifth metal piece, the fifth isolation resistance Provided in the slit of the sixth metal piece; [0010] the second base includes a first folded metal piece and a second folded metal piece, and the first folded metal piece and the second folded metal piece are connected Forming a fold gap; and

 [0011] The first folded metal piece is provided with a first connecting region, and the second folded metal piece is provided with a second connecting region.

 [0012] Preferably, the first connection area and the second connection area are all circular areas.

 [0013] Preferably, the width of the first metal piece is the same as the width of the first base and the second base

[0014] Preferably, the first connection area and the second connection area are all circular.

 [0015] Preferably, the first folded metal piece and the second folded metal piece are joined to form a fold gap.

 [0016] Preferably, the folding slit is a zigzag-shaped slit.

 Advantageous effects of the invention

 Beneficial effect

 [0017] The present invention adopts the above technical solution, and brings the technical effects as follows: The five-section cascade coupling line structure in the broadband balun of the invention adopts a five-section gradient structure design, improves the stability of the phase difference and improves the stability. Phase shifting effect.

 Brief description of the drawing

 DRAWINGS

1 is a schematic structural view of a five-section cascade coupling line structure in a broadband balun of the present invention; 2 is a dimensional depiction of a preferred embodiment of various components of a five-section cascaded coupled line structure in a broadband balun of the present invention; [0019] FIG.

 3 is a schematic view showing the structure of a preferred embodiment of a second base in a five-section cascade coupling line structure in the broadband balun of the present invention.

 [0021] The objects, features, and advantages of the present invention will be further described in conjunction with the embodiments.

 BEST MODE FOR CARRYING OUT THE INVENTION

 BEST MODE FOR CARRYING OUT THE INVENTION

The specific embodiments, structures, features and functions of the present invention are described in detail below with reference to the accompanying drawings and preferred embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

 Referring to FIG. 1, FIG. 1 is a schematic structural diagram of a five-section cascade coupling line structure in a broadband balun of the present invention.

 Figure 2 is a dimensional illustration of a preferred embodiment of the various components of a five-section cascaded coupled line structure in a broadband balun of the present invention.

 [0024] As shown in FIGS. 1 to 2, the five-section cascade coupling line structure 10 includes a first isolation resistor R1, a second isolation resistor R2, a third isolation resistor R3, a fourth isolation resistor R4, and a first metal. The sheet 100, the second metal sheet 1 10, the third metal sheet 120, the fourth metal sheet 130, the fifth metal sheet 140, the sixth metal sheet 150, the first base 160 and the second base 170.

 [0025] The five-section cascade coupling line structure 10 is a tower structure including a tower body and a tower base. The first metal piece 100, the second metal piece 110, the third metal piece 120, the fourth metal piece 130, the fifth metal piece 140, and the sixth metal piece 150 are stacked to form a tower body, and the first A base 160 and a second base 170 form a tower base.

 [0026] wherein the first metal piece 100 is a rectangular solid structure. The second metal piece 110, the third metal piece 120, the fourth metal piece 130, the fifth metal piece 140, and the sixth metal piece 150 are all rectangular and have a slit (rectangular slit) inside. The dimensions of the first metal piece 100, the second metal piece 110, the third metal piece 120, the fourth metal piece 130, the fifth metal piece 140, and the sixth metal piece 150 are enlarged by section.

[0027] Further, the bottom of the first metal piece 100 is connected to the middle of the top of the second metal piece 110. Position, the bottom of the second metal piece 110 is connected to the middle of the top of the third metal piece 120, and the bottom of the third metal piece 120 is connected to the middle of the top of the fourth metal piece 130, the fourth metal The bottom of the sheet 130 is connected to the middle of the top of the fifth metal sheet 140, and the bottom of the fifth metal sheet 140 is connected to the middle of the top of the sixth metal sheet 150.

[0028] wherein, the second metal piece 110, the third metal piece 120, the fourth metal piece 130, the fifth metal piece 140, and the sixth metal piece 150 are all rectangular and have a gap in the middle of the metal The first isolation resistor R1 is disposed in the slit of the second metal piece 110, the second isolation resistor R2 is disposed in the gap of the third metal piece 120, and the third isolation resistor R3 is disposed on the fourth metal piece. In the gap of 130, the fourth isolation resistor R4 is disposed in the slit of the fifth metal piece 140, and the fifth isolation resistor R5 is disposed in the gap of the sixth metal piece 150.

 [0029] The first base 160 is disposed on the left side of the sixth metal piece 150, and the second base 170 is disposed on the right side of the sixth metal piece 150. The first base 160 is a metal piece with a rectangular solid structure. The second base 170 is an elongated structure.

 As shown in FIG. 2, the width of the first isolation resistor R1 is Sl, the width of the second isolation resistor R2 is S2, the width of the third isolation resistor R3 is S3, and the width of the fourth isolation resistor R4 is S4.

[0031] The first metal piece 100 has a length L0 and a width W0;

 [0032] The length of the second metal piece 110 is L1, the width of the second metal piece 110 is 2*W1+S1, and the width of the gap in the second metal piece 110 is S1, in other words, the second metal The sheet 110 is equivalent to two parallel metal sheets, each of which has a length L1 and a width W1, and the gap width between the two metal sheets arranged in parallel is SI;

 [0033] The length of the third metal piece 120 is L2, the width of the third metal piece 120 is 2*W2+S2, and the width of the gap in the third metal piece 120 is S2, in other words, the third metal The sheet 120 is equivalent to two parallel metal sheets, each of which has a length L2 and a width W2, and a gap width between the two metal sheets arranged in parallel is S2;

 [0034] The length of the fourth metal piece 130 is L3, the width of the fourth metal piece 130 is 2*W3+S3, and the width of the slit in the fourth metal piece 130 is S3, in other words, the fourth metal The sheet 130 is equivalent to two parallel metal sheets, each of which has a length L3 and a width W3, and a gap width between the two metal sheets arranged in parallel is S3;

[0035] The length of the fifth metal piece 140 is L4, the width of the fifth metal piece 140 is 2*W4+S4, and the width of the slit in the fifth metal piece 140 is S4, in other words, the fifth metal The sheet 140 is equivalent to two parallel metal sheets, each of which has a length L4 and a width W4, and a gap width between the two metal sheets arranged in parallel is S4; [0036] The length of the sixth metal piece 150 is L5, the width of the sixth metal piece 150 is 2*W5+S5, and the width of the gap in the sixth metal piece 150 is S5, in other words, the sixth metal The sheet 150 is equivalent to two parallel metal sheets, each of which has a length L5 and a width W5, and a gap width between the two metal sheets arranged in parallel is S5;

 [0037] The first base 160 has a length L6 and a width W0; the second base 170 has a length L6 and a width at both ends of wo.

 [0038] As shown in FIG. 3, the second base 170 is a metal piece having an arc shape in the middle. The second base 170 includes a first folded metal piece 1701 and a second folded metal piece 1703. The first folded metal piece 1701 and the second folded metal piece 1703 form a fold gap at the joint (ie, Z). Glyph-shaped gaps, not marked in the figure).

 Further, the first folded metal piece 1701 is provided with a first connection region 1702, and the second folded metal piece 1703 is provided with a second connection region 1704. The first connection area 1702 and the second connection area 1 704 are both circular.

 [0040] In this embodiment, the preferred parameters for the five-section cascaded coupled line structure in the broadband balun are as follows by the following parameters:

[] [Table 1]

Further, a five-section cascade coupling line structure 10 in the broadband balun is attached to the surface of the printed circuit board (not shown). The size of the printed circuit board is larger than the size of the five-section cascaded coupling line structure 10 in the broadband balun. The use of the above five-section gradient can achieve the stability of the phase difference and improve the phase shifting effect. The parameters of the five-section cascade coupling line structure in the broadband balun are not limited to the above preferred parameters. The number, the user can set the corresponding parameters according to the device specifications.

[0042] Generally, the lower surface of the printed circuit board is further provided with a metal ground (ie, Ground in the circuit, the metal ground may be a metal sheet of various shapes), and five sections on the surface of the printed circuit board. After the cascade coupling line structure 10 and the metal of the lower surface are connected, signal transmission can be performed. The first connection area 1702 and the second connection area 1704 are disposed on the second base 170 through the first connection area. The first connection area 1702 and the second connection area 1704 are disposed on the second base 170. 1702 and the second connection region 1704 are connected to the metal piece on the lower surface of the printed circuit board (for example, there are two through holes on the printed circuit board, and the two through holes respectively correspond to the first connection region 1702 and the second connection region 1704, By arranging the copper pillars in the through holes, the five-section cascaded coupling line structure 10 can be connected to the metal ground on the lower surface of the printed circuit board to realize the five-segment coupling line structure 10 on the surface of the printed circuit board and the metal ground. Signal phase shift). In addition, since the five-section cascade coupled line structure 10 adopts a five-step gradient structure design, the transmitted signal can be released step by step, which is beneficial to buffering during signal transmission, and is advantageous for stability in signal transmission.

 The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformations made by the description of the invention and the contents of the drawings, or indirectly or indirectly The technical field is equally included in the scope of patent protection of the present invention.

 Industrial applicability

 [0044] The present invention adopts the above technical solution, and brings the technical effects as follows: The five-section cascade coupling line structure in the broadband balun of the present invention adopts a five-section gradient structure design, improves the stability of the phase difference and improves the stability. Phase shifting effect.

Claims

Claim  [Claim 1] A five-section cascade coupling line structure in a broadband balun, wherein the five-section cascade coupling line structure includes a first isolation resistor, a second isolation resistor, and a third isolation resistor, Four isolation resistors, a first metal piece, a second metal piece, a third piece of metal, a fourth piece of metal, a fifth piece of metal, a sixth piece of metal, a first base and a second base; The first metal piece is a rectangular solid structure, and the second metal piece, the third metal piece, the fourth metal piece, the fifth metal piece and the sixth metal piece are both rectangular and have a slit structure inside. The bottom of the first metal piece is connected to the middle of the top of the second metal piece, the bottom of the second metal piece is connected to the middle of the top of the third piece of metal, and the bottom of the third piece of metal Connected to the middle of the top of the fourth metal piece, the bottom of the fourth metal piece is connected to the middle of the top of the fifth metal piece, and the bottom of the fifth metal piece is connected to the top of the sixth piece of metal piece. a first base is disposed on a left side of the sixth metal piece, and a second base is disposed on a right side of the sixth metal piece; and the first isolation resistor is disposed in a gap of the second metal piece, the second The isolation resistor is disposed in the slit of the third metal piece, the third isolation resistor is disposed in the slit of the fourth metal piece, the fourth isolation resistance is disposed in the gap of the fifth metal piece, and the fifth isolation resistance is set in the first The second base includes a first folded metal piece and a second folded metal piece, and the first folded metal piece and the second folded metal piece form a fold gap. And the first connecting metal piece is provided with a first connecting region, and the second folded metal piece is provided with a second connecting region.  [Claim 2] A five-section cascade coupling line structure in a broadband balun according to claim 1, wherein The first connection area and the second connection area are both circular areas.  [Claim 3] A five-section cascade coupling line structure in a broadband balun according to claim 1, wherein The width of the first metal piece is the same as the width of the first base and the second base.  [Claim 4] A five-section cascade coupling line structure in a broadband balun according to claim 1, wherein The first connection area and the second connection area are all circular. [Claim 5] A five-section cascade coupling line structure in a broadband balun according to claim 1, wherein The first folded metal piece and the second folded metal piece are joined to form a folded gap.  [Claim 6] A five-section cascade coupling line structure in a broadband balun according to claim 5, wherein The fold gap is a zigzag type slit.