TWI650899B - Hybrid serial high frequency signal distribution circuit - Google Patents

Abstract

The invention is a hybrid series-connected high-frequency signal distribution circuit. The transmission line group is arranged on a substrate. The first transmission line includes a first rectangular surrounding segment and a first transversely extending segment. The second transmission line includes a second rectangular surrounding section and a second transversely extending section. The third transmission line includes a third rectangular surrounding section and a third transverse extending section. A first extension section and a second extension section extend on both sides of the first transverse extension section. A third extension section and a fourth extension section extend on both sides of the second transverse extension section. A fifth extension section and a sixth extension section extend on both sides of the third transverse extension section. The fourth transmission line extends on both sides of a seventh extension and an eighth extension. First conductive blocks are spaced from the third extension. Second conductive blocks are spaced apart from the fifth extension. Third conductive blocks are spaced from one side of the fourth transmission line. A load element is connected between the third extension section and the first conductive block, between the fifth extension section and the second conductive block, and between the fourth transmission line side and the third conductive block, and different power distribution ratios cannot be used. The dry coupler forms a distributed circuit that connects high-frequency signals in a hybrid manner.

Description

Hybrid series high-frequency signal distribution circuit

The present invention relates to a hybrid series-connected high-frequency signal distribution circuit, and more particularly, to a branch coupler technology that can use branch couplers with different power distribution ratios to form a series-connected high-frequency signal distribution circuit in a hybrid manner.

With the rapid development of science and technology, the microwave technology of wireless communication systems has progressed very quickly and widely. Life is closely connected, and products are also developing in the direction of high efficiency, low cost, easy production, thinness and shortness, so that broadband, multi-band, downsizing and adjustable structure have become necessary items for designing couplers. Furthermore, the branch coupler such as reference [1-4] plays an important role in microwave circuits, and is used in many aspects, such as power amplifiers such as reference [5], antenna arrays such as reference [6-7] ], Output port power varies, such as reference [8-9], power allocation as reference [10].

According to the traditional branch coupler, which is symmetrical left and right and up and down, and contains input ports, output ports, coupling ports, and isolation ports, its basic structure is that the electrical length of the transmission line is a quarter wavelength (θ = 90 °), and its output port S ₂₁ | and coupling port | S ₃₁ | The output power ratio is determined by the impedance of the transmission line. The phase difference between the two output signals is 90 degrees, and the input port | S ₁₁ | and the isolated port | S ₄₁ | are below -15dB. In order to meet the requirements of different environments, the ratio of input points and output points of today's coupler circuit designs must be able to be more flexible. This article proposes a hybrid series high-frequency signal distribution circuit design with adjustable output power. How to develop a set of branch coupler technology that can adjust the output power of a hybrid series-connected high-frequency signal distribution circuit has become a technical issue eager to be solved and challenged by the relevant industry-academia industry.

According to the current knowledge, no patent or paper has been proposed for a hybrid series high-frequency signal distribution circuit with adjustable output power, and based on the urgent needs of the electronics industry, the creators of the present invention have made continuous efforts to develop As a result, a set of technical concepts different from the above-mentioned documents has finally been developed.

The main object of the present invention is to provide a hybrid series-connected high-frequency signal distribution circuit, which mainly uses branch couplers with different power distribution ratios to form a series-connected high-frequency signal distribution circuit in a hybrid manner, and is used to provide arbitrary high-frequency signals The power is distributed and has the function of outputting power to the next stage, so that a circuit can realize multiple and multiple output ratio couplers, which is very convenient in the construction of the system, and is suitable for a variety of different center frequencies. The circuit has a high degree of system support , And can reduce the cost of the entire system construction. The technical means adopted to achieve the above-mentioned purpose is to set a transmission line group on the substrate. The first transmission line includes a first rectangular surrounding segment and a first transversely extending segment. The second transmission line includes a second rectangular surrounding section and a second transversely extending section. The third transmission line includes a third rectangular surrounding section and a third transverse extending section. A first extension section and a second extension section extend on both sides of the first transverse extension section. A third extension section and a fourth extension section extend on both sides of the second transverse extension section. A fifth extension section and a sixth extension section extend on both sides of the third transverse extension section. The fourth transmission line extends on both sides of a seventh extension and an eighth extension. First conductive blocks are spaced from the third extension. Second conductive blocks are spaced apart from the fifth extension. Third conductive blocks are spaced from one side of the fourth transmission line. Between the third extension and the first conductive block, between the fifth extension and the second conductive block, and on the fourth transmission line side with the third conductive Each block is connected with a load element.

10‧‧‧ substrate

20‧‧‧ Transmission line group

21‧‧‧ transmission line

210‧‧‧The first rectangular surrounding segment

211‧‧‧The first horizontal stretch

211a‧‧‧first extension

211b‧‧‧second extension

211c‧‧‧The first straight stretch

211d‧‧‧first triangle segment

22‧‧‧Second transmission line

220‧‧‧Second rectangular surrounding segment

221‧‧‧Second transverse extension

221a‧‧‧third extension

221b‧‧‧Fourth Extension

221c‧‧‧Second straight extension

221d‧‧‧Second Triangular Segment

23‧‧‧Third transmission line

230‧‧‧ the third rectangular surrounding segment

231‧‧‧Third horizontal extension

231a‧‧‧Fifth extension

231b‧ Sixth Extension

24‧‧‧ Fourth Transmission Line

240‧‧‧ seventh extension

241‧‧‧eighth extension

25‧‧‧The first conductive block

26‧‧‧Second conductive block

27‧‧‧ the third conductive block

R‧‧‧ load element

FIG. 1 is a schematic structural diagram of a hybrid high-frequency signal distribution circuit according to the present invention.

FIG. 2 is a schematic diagram of a distribution structure of a third-order hybrid high-frequency signal according to the present invention.

Figure 3 is a schematic diagram of the architecture of a traditional branch coupler.

Fig. 4 is a comparison diagram of the impedance ratio of the branch coupler.

FIG. 5 (a) is a schematic diagram of a third-order hybrid high-frequency signal distribution circuit according to the present invention.

FIG. 5 (b) is a schematic circuit analysis diagram of the first-stage branch coupler of the present invention.

FIG. 5 (c) is a schematic circuit analysis diagram of the second-stage branch coupler of the present invention.

FIG. 5 (d) is a schematic diagram of a circuit analysis of a third-stage branch coupler according to the present invention.

FIG. 6 (a) is a schematic diagram of a third-order hybrid high-frequency signal distribution forming circuit according to the present invention.

FIG. 6 (b) is a schematic diagram of circuit formation of the first-stage branch coupler of the present invention.

FIG. 6 (c) is a schematic diagram of circuit formation of the second-stage branch coupler of the present invention.

FIG. 6 (d) is a schematic diagram of circuit formation of the third-stage branch coupler of the present invention.

FIG. 7 is a schematic diagram of a third-order hybrid high-frequency signal distribution entity circuit according to the present invention.

FIG. 8 (a) is a schematic diagram of circuit simulation and measurement data outputted to each port after entering from port 1 of the present invention.

FIG. 8 (b) is a schematic diagram of circuit simulation and measurement data of the present invention and output to each port after entering from port 2.

FIG. 8 (c) is a schematic diagram of circuit simulation and measurement data outputted to each port after entering from port 3 of the present invention.

FIG. 8 (d) is a schematic diagram of circuit simulation and measurement data outputted to each port after entering from port 4 of the present invention.

FIG. 8 (e) is a schematic diagram of circuit simulation and measurement data outputted to each port after entering from port 5 of the present invention.

In order to allow your reviewers to further understand the overall technical features of the present invention and the technical means for achieving the purpose of the present invention, specific embodiments and drawings are described in detail below:

In short, the present invention is a branch coupler using different power distribution ratios, A distribution circuit for connecting high-frequency signals in a hybrid manner is used to provide arbitrary power distribution of high-frequency signals and has the function of outputting power to the next stage. Circuit analysis is based on energy conservation. According to the requirements of the design, it can provide any number of output ports and any power ratio output at the output ports. Two types of circuit structures are proposed for the power distribution unit to facilitate system design and use. In the present invention, a third-order hybrid high-frequency signal distribution circuit is used for design, simulation, and experiments. The solid circuit is manufactured with a FR-4 circuit board having a thickness of 1.6 mm and a relative dielectric constant of 4.3. The simulation and experimental results are very consistent within the scope of the test experiment, verifying the correctness of the circuit design of the present invention.

Please refer to FIGS. 6 a to 6 d and FIG. 7. In order to achieve the main purpose of the present invention, a transmission line group 20 is covered on the substrate 10. The transmission line group 20 includes a first transmission line 21 and a second transmission line 22. A third transmission line 23 and a fourth transmission line 24 extending laterally and connected to the bottom edges of the first transmission line 21, the second transmission line 22 and the third transmission line 23. The first transmission line 21 includes a first rectangular surrounding segment 210 connected in a rectangular surrounding and a first transversely extending segment 211 connected to a top edge of the first rectangular surrounding segment 210. The second transmission line 22 includes a second rectangular surrounding segment 220 connected in a rectangular surround and a second transversely extending segment 221 connected to the top edge of the second rectangular surrounding segment 220. The third transmission line 23 includes a third rectangular surrounding segment 230 connected in a rectangular surround and a third horizontally extending segment 231 connected to the top edge of the third rectangular surrounding segment 230. A first extension section 211a and a second extension section 211b are respectively extended on two sides of the first transverse extension section 211. A third extension section 221a and a fourth extension section 221b extend from two sides of the second transverse extension section 221, respectively. A fifth extension section 231a and a sixth extension section 231b are respectively extended on two sides of the third horizontal extension section 231. A seventh extension 240 and an eighth extension 241 are respectively extended on the two sides of the fourth transmission line 24. A first conductive block 25 is spaced from the outside of the third extension section 221a, and a second conductive block 26 is spaced from the outside of the fifth extension section 231a. A third conductive block 27 is disposed on one side of the fourth transmission line 24. The third extension section 221a and the first conductive block A load element R is connected between the fifth extension 231a and the second conductive block, and between the fourth transmission line 24 and the third conductive block.

Specifically, in the embodiments shown in FIGS. 5 and 8, the first transmission line 21, the second transmission line 22, and the third transmission line 23 are three-stage branch couplers connected in series by connecting four transmission lines 24.

Specifically, as shown in FIGS. 6 a to 6 d and FIG. 7, the second extension section 211 b extends upwards with a first extension section 211 _c , the length of the first extension section 211 _c is W ₃ = 5 mm, and the line width L ₂ = 3.1 mm. The fourth extension section 221b extends upward with a second straight extension section 221c. The length W _{4 of} the second straight extension section 221 _{c is} 8.67 mm, and the line width L _{3 is} 3.1 mm.

As shown in FIGS. 6 a to 6 d and FIG. 7, a joint of the second extension segment 211 b and the first straight extension segment 211 c has a first triangular segment 211 d forming a chamfered edge. A joint of the fourth extension section 221b and the second straight extension section 221c has a second triangular section 221d forming a chamfered edge.

As shown in FIGS. 6 a to 6 d and FIG. 7, the first transversely extending section 211 includes a length L _{1 of the} first extending section 211 a and a second extending section 211 b of 65.89 mm. The first extension 211a has a line width W ₁ = 3.1 mm and a length L ₃ = 9 mm. The length L _{5 of the} second extension segment 211 _{b is 5} mm, and the line width W _{1 is} 3.1 mm. The length of the inner side of the first transmission line 21 in the lateral direction is L ₄ = 40.08 mm, and the length of the inner side in the longitudinal direction is W ₅ = 40.57 mm. The line width W _{2 of the} first transmission line 21 plus the first transversely extending section 211 is 7.52 mm. The length of the longitudinal outer side of the first transmission line 21 W ₄ = 49.41 mm. The fourth transmission line 24 includes a seventh extension section 240 and an eighth extension section 241 with a length of 181.23 mm and a line width W ₇ = 3.1 mm. The first conductive block L ₇ = 2 mm, and the width W ₆ = 3.1 mm.

As shown in FIGS. 6 a to 6 d and FIG. 7, the second transversely extending section 221 includes a third extending section 221 a and a fourth extending section 221 b having a length L ₂ = 53.84 mm. The length L _{4 of the} third extension 221 a is 3 mm. The fourth extension 221b has a length L ₆ = 5 mm and a line width W ₃ = 3.1 mm. The length of the inner side of the second transmission line 22 in the lateral direction L ₅ = 40.99 mm, and the length of the inner side in the longitudinal direction W ₆ = 42.34 mm. The line width W _{2 of the} second transmission line 22 plus the second transversely extending section 221 is 4.8 mm. The longitudinal outer side length W _{5 of the} second transmission line 22 is 45.74 mm. The second conductive block L ₁ = 2 mm, and the width W ₁ = 3.1 mm.

As shown in FIGS. 6 a to 6 d and FIG. 7, the third transversely extending section 231 includes a fifth extending section 231 a and a sixth extending section 231 b having a length L ₂ = 51.5 mm. The length L _{3 of the} fifth extension section 231 a is ₃ mm. The length L _{5 of the} sixth extension 231 b is ₅ mm. The length of the inner side of the third transmission line 23 in the lateral direction is L ₄ = 41.41 mm, and the length of the inner side in the longitudinal direction is W ₄ = 43.66 mm. The line width W _{2 of the} third transmission line 23 plus the third transversely extending section 231 is 3.91 mm. The longitudinal length W _{3 of the} second transmission line 22 is 45.27 mm. The third conductive block L ₁ = 2 mm, and the width W ₁ = 3.1 mm.

When the power output ratios of the first transmission line 21, the second transmission line 22, and the third transmission line 23 are 1: 1, the impedance ratio of the first transmission line 21 is 1: 2.3, the X-axis impedance Z ₁ = 27.38Ω, and the Y-axis impedance Z ₂ = 32.73Ω, the impedance ratio of the second transmission line 22 is 1.3: 1, the X-axis impedance is Z ₁ = 37.79Ω, the Y-axis impedance Z ₂ = 57.73Ω, and the impedance ratio of the third transmission line 23 is 1: 0.3, X The axial impedance is Z ₁ = 43.3Ω, and the Y-axis impedance Z ₂ = 86.6Ω, as shown in Table 1 below.

The circuit of the present invention is composed of multiple branch couplers connected in series. The circuit structure is shown in FIG. 1, where P _in represents input power, # 1, # 2, and # 3 represent different power outputs. The first-order branch coupler (that is, the first transmission line), the second-order branch coupler (that is, the second transmission line), and the third-order branch coupler (that is, the third transmission line) branch coupler, a1, aj, aN is the output point, P _{out is} the power output to the lower stage, Matched load is the matched load for absorbing the reflected signal, where Type1 is the output signal of P2 (output port), P3 (isolated port) output power to the lower stage, and Type2 P2 (output port) outputs power to the lower stage, and P3 (isolated port) outputs signals. The advantage of the circuit of the invention is that a coupler with multiple output ratios can be realized by one circuit, which is quite convenient for system construction, and is suitable for a variety of different center frequencies. The circuit has high system support and can reduce the overall system construction. Cost of ownership.

In the embodiment of circuit analysis and design, the circuit analysis of the present invention is described by taking a third-order hybrid high-frequency signal distribution circuit as an example, in which # 1 uses Type1 and # 2 uses Type2. As shown in FIG. 2, P _in represents the input power. # 1, # 2, and # 3 represent the first-order branch coupler (that is, the first transmission line), the second-order branch coupler (that is, the second transmission line), and the third-order branch coupler with different power outputs. (Ie, the third transmission line) a branch coupler, a1, a2, a3 are output points, P _out represents the power output to the lower stage, and Matched load is the above-mentioned load element; that is, a matched load is used to absorb reflected signals. Assume that the input power is normalized to 1, and the output power is p, and the third-order hybrid power distribution circuit has three output points, a1, a2, and a3, respectively. From the principle of energy conservation, we can know that a1 + a2 + a3 = 1-p. If the output power of the three output points is not uniformly distributed and its total is k, as shown in formula (1), the output power ratios of the output ports P2 and P3 of the branch couplers at all levels can be expressed by formula (2), (3), (4) can be calculated.

a1 + a2 + a3 = k (1)

P sets the hybrid high-frequency signal distribution circuit to the third order, and the power input to the lower stage is 0.1. # 1 uses Type1 and # 2 uses Type2. Refer to the aforementioned formulas (1), (2), (3), and (4). The parameters are shown in Table 1, where a1, a2, and a3 are the output ratios of the three output points, and # 13, # 22, and # 33 are the output power ratios of the branch couplers P2 and P3. The structure of a traditional branch coupler is shown in Figure 3. Port1 is an input port, Port2 is an output port, Port3 is a coupling port, Port4 is an isolated port, Z ₁ and Z ₂ are transmission line impedances, and θ ₁ = θ ₂ is the electrical length (traditional electrical The length is 90 degrees). The output ratio of the output port to the coupling port is determined by the transmission line impedance of Z ₁ and Z ₂ . Figure 4 shows the impedance ratio of the branch coupler, where the X-axis is the impedance of Z ₁ and the Y-axis is the impedance of Z _2. The leftmost point in the example is P2: P3 = 1:10 when Z ₁ = 15.07Ω, Z ₂ = 15.81Ω, the rightmost point in the figure is P2: P3 = 10: 1 Z ₁ = 47.67Ω, Z ₂ = 158.11Ω, which can be obtained when a1: a2: a3 is brought into the first line in Table 1. When = 1: 1: 1, the impedance ratio of # 1 is 1: 2.3, the impedance is Z ₁ = 27.38Ω, Z ₂ = 32.73Ω, the impedance ratio of # 2 is 1.3: 1, the impedance is Z ₁ = 37.79Ω, Z ₂ = 57.73Ω, the impedance ratio of # 3 is 1: 0.3, the impedance is Z ₁ = 43.3Ω, Z ₂ = 86.6Ω, the specific content is shown in Table 1 below.

Software to create a high frequency signal using an analog circuit diagram of a third order profile hybrid FIG. 5 (a), wherein the parameters into the # 1 _{Z 1 = 27.38Ω, Z 2 =} 32.73Ω and set f ₀ = 0.915GHz, EL = 90Deg may to obtain a circuit diagram of the coupler branches # 1, FIG. 5 (b), into the parameter # 2 _{Z 1 = 37.79Ω, Z 2 =} 57.73Ω and set f ₀ = 0.915GHz, EL = 90deg available # 2 coupler branches a circuit diagram, FIG. 5 (c), the parameter Z 3 into the # ₁ = _43.3Ω, Z ₂ = _86.6Ω and let f ₀ = 0.915GHz, EL = 90deg obtained coupler branches # 3 The circuit diagram is shown in Figure 5 (d). The above circuits use simulation software to verify the circuits and they are in good agreement with the expected results.

The third-order hybrid high-frequency signal distribution circuit of the present invention uses electromagnetic simulation software to verify the circuit characteristics. The sheet material is FR4 (thickness: 1.6mm) and the relative dielectric constant is 4.3. 1 circuit as shown in Figure 6 (b), circuit size: L ₁ = 65.89mm, W ₁ = 3.1mm, L ₂ = 3.1mm, W ₂ = 7.52mm, L ₃ = 9mm, W ₃ = 5mm, L ₄ = 40.08 mm, W ₄ = 49.41mm, L ₅ = 5mm, W ₅ = 40.57mm, L ₆ = 5.9mm, W ₆ = 3.1mm, L ₇ = 2mm, W ₇ = 3.1mm, L ₈ = 62.39mm. # 2The circuit is shown in Figure 6 (c). The circuit size is: L ₁ = 2mm, W ₁ = 3.1mm, L ₂ = 53.84mm, W ₂ = 4.8mm, L ₃ = 3.1mm, W ₃ = 3.1mm, L ₄ = 3mm, W ₄ = 8.67mm, L ₅ = 40.99mm, W ₅ = 45.74mm, L ₆ = 5mm, W ₆ = 42.34mm, L ₇ = 2.42mm, W ₇ = 3.1mm, L ₈ = 61.84mm. # 3The circuit is shown in Figure 6 (d). The circuit size is: L ₁ = 2mm, W ₁ = 3.1mm, L ₂ = 51.5mm, W ₂ = 3.91mm, L ₃ = 3mm, W ₃ = 45.27mm, L ₄ = 41.41mm, W ₄ = 43.66mm, L ₅ = 5mm, W ₅ = 3.1mm, L ₆ = 1.04mm, L ₇ = 57mm, L ₈ = 5mm. The finished product after engraving machine processing is shown in Figure 7.

A network analyzer measures the physical circuit and compares the simulation results with the simulation results. The frequency response of the circuit is shown in Figure 8 (a). The measurement frequency is from 0 to 2 GHz, and the size is from 0 to -60 dB. f ₀ = 0.915GHz) The reflection coefficient | S ₁₁ | at the input point is below -15dB, and the output power ratios of the output terminals a1, a2, and a3 | S ₂₁ |, | S ₃₁ |, and | S ₄₁ | are about 1: 1 : 1, the power | S ₅₁ | output to the lower stage is about -11dB. Figure 8 (b) is the circuit simulation and measurement data output to ports after entering from port 2, where | S ₁₂ | is the output power of a1, at the working frequency band ( f ₀ = 0.915GHz) | S ₁₂ | It is -5.2dB, and the reflection coefficients of each port such as | S ₂₂ |, transmission coefficients | S ₃₂ |, | S ₄₂ |, | S ₅₂ | are all far below -15dB. Figure 8 (c) is the circuit simulation and measurement data output to ports after entering from port 3, where | S ₁₃ | is the output power of a2, at the working frequency band ( f ₀ = 0.915GHz) | S ₁₃ | It is -5.6dB. The reflection coefficients of each port such as | S ₂₃ |, transmission coefficients | S ₃₃ |, | S ₄₃ |, | S ₅₃ | are all far below -15dB. Figure 8 (d) is the circuit simulation and measurement data output from ports 4 after entering to each port, where | S ₁₄ | is the output power of a3, at the working frequency band ( f ₀ = 0.915GHz) | S ₁₂ | It is -5.6dB. The reflection coefficients of each port such as | S ₂₄ |, transmission coefficients | S ₃₄ |, | S ₄₄ |, | S ₅₄ | are all far below -15dB. Figure 8 (e) is the circuit simulation and measurement data output to ports after entering from port 5, where | S ₁₅ | is the power output to the lower stage, at the operating frequency band ( f ₀ = 0.915GHz) | S ₁₅ | About -11dB, | S ₂₅ |, transmission coefficients | S ₃₅ |, | S ₄₅ |, | S ₅₅ | are all far lower than -15dB. The above simulation and measurement results are quite close to expectations.

According to the above specific embodiments, the present invention provides a hybrid series high-frequency signal distribution circuit design that can be distributed at any power. The circuit is based on a traditional branch coupler, and multiple branches are connected in series. Coupler connection can provide any number of output ports and output power at any power ratio. The circuit design is implemented by a third-order hybrid high-frequency signal distribution circuit. The output power ratio is 1: 1 and output to the lower level. The power is 0.1, and the simulation and actual measurement results are quite close. The feasibility of this circuit can be known, and it can be widely used in power distribution systems with different center frequencies.

The above description is only a feasible embodiment of the present invention, and is not intended to limit the patent scope of the present invention. Any equivalent implementation of other changes based on the content, characteristics and spirit of the following claims should be It is included in the patent scope of the present invention. The structural features specifically defined in the present invention are not found in similar items, and are practical and progressive. They have met the requirements for invention patents. They have filed applications in accordance with the law. I would like to request the Bureau to verify the patents in accordance with the law in order to maintain this document. Applicants' legitimate rights and interests.

references

M. Muraguchi, T. Yukitake and Y. Naito, "Optimum design of 3-dB branch-line couplers using microstrip line," IEEE Trans. , Vol. 31, no. 8, pp.674-678, Aug. 1983.

[2] J. Reed and GJ Wheeler, "A Method of Analysis of Symmetrical Four-Port Networks," IRE Trans. Microwave Theory and Techniques, vol. 4, no. 4, pp. 246-252, Oct. 1956.

[3] Tseng, C.-H. and Wu and C.-H., "Design of compact branch-line couplers using n-equivalent artificial transmission lines," Microwaves, Antennas & Propagation, ET,, Vol. 6, pp. 969-974, June 2012.

[4] S. Kumar, C. Tannous and T. Danshin, “Multisection Broadband Impedance Transform Branch line Hybrid,” IEEE Transactions. Microwave Theory Techniques, vol. 43, no. 11, pp. 2517-2523, Nov. 1995.

[5] ID Robertson , R. Herath , M. Gillick and J. Bharj , "Solid state power amplifier using impedance-transforming branch-line couplers for L-band satellite systems," Microwave Conference, 1993. 23rd European , pp. 448 -450, Sept. 1993.

[6] S. Cheng, E. Ojefors, P. Hallbjorner and A. Rydberg, “Compact reflective microstrip phase shifter for traveling wave antenna applications,” IEEE Microwave and Wireless Components Letters , vol. 16, no. 7, pp. 431 -433, Jul. 2006.

[7] AKM Baki and Nemai Chandra Karmakar, “Staircase power distribution of array antenna for UHF band RFID reader,” Electrical & Computer Engineering (ICECE), 2012 7th International Conference , pp. 854-857, Dec. 2012.

[8] Chun-HanYu and Yi-HsinPang , " Dual-BandUnequal-PowerQuadratureBranch-LineCoupler With Coupled Lines ," IEEE Microwave and Wireless Components Letters , Vol. 23, No. 1 , pp.10-12, Dec. 2013.

[9] Hyun-Tai Kim , Kwi-Soo Kim and Jong-Sik Lim , Dal Ahn , "A Branch Line Hybrid having Arbitrary Power Division Ratio and Port Impedances," Microwave Conference, 2006. APMC 2006. Asia-Pacific , pp. 1376-1379.1, Dec. 2006.

[10] H. Ashoka , "Practical realisation of difficult microstrip line hybrid couplers and power dividers," Microwave Symposium Digest, 1992., IEEE MTT-S International , pp. 273-276.1, June. 1992.

Claims (8)

A hybrid series-connected high-frequency signal distribution circuit includes a substrate and a transmission line group covering the substrate. The transmission line group includes a first transmission line, a second transmission line, a third transmission line, and a laterally extending and A fourth transmission line connected to the bottom edge of the first transmission line, the second transmission line, and the third transmission line; the first transmission line includes a first rectangular surrounding segment connected in a rectangular surround connection and a top connected to the first rectangular surrounding segment; A first horizontally extending segment of the edge; the second transmission line includes a second rectangularly surrounding segment connected in a rectangular surround and a second horizontally extending segment connected to the top edge of the second rectangularly surrounding segment; the third transmission line includes a rendering A third rectangular surrounding segment connected by a rectangular surround and a third horizontal extending segment connected to the top edge of the third rectangular surrounding segment; a first extending segment and a second extending segment extending on two sides of the first horizontal extending segment respectively; A third extension section and a fourth extension section are respectively extended on the two sides of the second transverse extension section; a fifth extension section and a sixth extension section are respectively extended on the two sides of the third transverse extension section; and the fourth transmission line has two sides. Respectively extend There is a seventh extension and an eighth extension; a first conductive block is spaced apart from the outside of the third extension; a second conductive block is spaced apart from the fifth extension; a first conductive block is spaced apart from the fourth transmission line. Three conductive blocks; a load is connected between the third extension and the first conductive block, between the fifth extension and the second conductive block, and between the fourth transmission line side and the third conductive block element. The hybrid series-connected high-frequency signal distribution circuit according to claim 1, wherein the first transmission line, the second transmission line, and the third transmission line are third-order branch couplings connected in series by connecting the fourth transmission line Device. The hybrid series-connected high-frequency signal distribution circuit according to claim 2, wherein the second extension section extends upwards with a first straight section, the length of the first straight section W ₃ = 5 mm, and the line width L ₂ = 3.1mm; the fourth extension section extends upward with a second straight extension section, the length of the second straight extension section W ₄ = 8.67mm, and the line width L ₃ = 3.1mm. The hybrid series-connected high-frequency signal distribution circuit according to claim 3, wherein a joint of the second extension section and the first straight extension section has a first triangular section forming a chamfered edge; the fourth extension section and The second straight extending section has a second triangular section forming a chamfered edge at the joint. The hybrid series-connected high-frequency signal distribution circuit according to claim 1, wherein the first transverse extension includes a length L _{1 of} the first extension and the second extension of 65.89 mm; the first extension The line width W ₁ = 3.1 mm and the length L ₃ = 9 mm; the length of the second extension L ₅ = 5 mm and the line width W ₁ = 3.1 mm; the length of the inner side of the first transmission line L ₄ = 40.08 mm, longitudinal The inner side length W ₅ = 40.57mm; the first transmission line plus the line width of the first transverse stretch W ₂ = 7.52mm; the longitudinal outer side length of the first transmission line W ₄ = 49.41mm; the fourth transmission line includes the first The length of the seventh extension and the eighth extension is 181.23 mm, and the line width W ₇ = 3.1 mm; the first conductive block L ₇ = 2 mm, and the width W ₆ = 3.1 mm. The hybrid series-connected high-frequency signal distribution circuit according to claim 1, wherein the second transverse extension includes a length L _{2 of} the third extension and the fourth extension L = 53.84mm; the third extension The length L ₄ = 3 mm; the length of the fourth extension L ₆ = 5 mm, and the line width W ₃ = 3.1 mm; the length of the inner side of the second transmission line L ₅ = 40.99 mm, and the length of the inner side W ₆ = 42.34 mm. ; The second transmission line plus the line width W _{2 of} the second transversely stretched segment is 4.8 mm; the longitudinal outside length of the second transmission line W ₅ = 45.74 mm; the second conductive block L ₁ = 2 mm, and the width W ₁ = 3.1 mm. The hybrid series-connected high-frequency signal distribution circuit according to claim 1, wherein the third transverse extension includes a length L _{2 of} the fifth extension and the sixth extension L = 51.5mm; the fifth extension The length L ₃ = 3 mm; the length of the sixth extension L ₅ = 5 mm; the length of the inner side of the third transmission line L ₄ = 41.41 mm, and the length of the inner side of the longitudinal direction W ₄ = 43.66 mm; the third transmission line plus the The line width W _{2 of the} third transversely extending section is 3.91 mm; the length of the longitudinal outer side of the second transmission line W _{3 is} 45.27 mm; the third conductive block L _{1 is} 2 mm, and the width W _{1 is} 3.1 mm. The hybrid series-connected high-frequency signal distribution circuit according to claim 1, wherein when the power output ratio of the first transmission line, the second transmission line, and the third transmission line is 1: 1, the The impedance ratio is 1: 2.3, the X-axis impedance Z ₁ = 27.38Ω, and the Y-axis impedance Z ₂ = 32.73Ω. The impedance ratio of this second transmission line is 1.3: 1, the X-axis impedance is Z ₁ = 37.79Ω, and the Y-axis impedance. Z ₂ = 57.73Ω, the impedance ratio of the third transmission line is 1: 0.3, the X-axis impedance is Z ₁ = 43.3Ω, and the Y-axis impedance Z ₂ = 86.6Ω.