Open stub odd power divider circuit for wifi

Abstract

The application provides an open stub odd power divider circuit applied to WiFi, which is used for distributing signals from one port to multiple ports, and comprises a bottom signal input layer, a middle metal ground layer and an upper signal distribution layer, the middle metal ground layer is arranged between the bottom signal input layer and the upper signal distribution layer to realize the communication connection between the bottom signal input layer and the upper signal distribution layer; wherein the upper signal distribution layer comprises an open stub and a transmission line, the open stub is distributed in a ring shape, and the transmission line is folded and distributed in the ring of the open stub; the bottom signal input layer is used for transmitting input signals to the upper signal distribution layer to drive the power divider; and the upper signal distribution layer is used for dividing the input signals into several equal-amplitude output signals.

Description

Technical Field

[0001] This invention relates to the field of communication technology, and in particular to an open-circuit stub odd-number power divider circuit for use in Wi-Fi. Background Technology

[0002] Power dividers are important components in microwave systems that distribute signals from one port to multiple ports. They are widely used in microwave equipment such as phased array radars and multi-channel relay communication devices.

[0003] While the Luzzatto power divider has solved the planar layout problem of the original Wilkinson power divider, its size cannot be reduced due to the presence of a quarter-wavelength line, making it difficult to apply in modern communication systems. Summary of the Invention

[0004] This invention provides an open-circuit stub odd-number power divider circuit for Wi-Fi to solve the problem of the inability to reduce the size of the power divider.

[0005] According to a first aspect of the present invention, an open-circuit stub odd power divider circuit for Wi-Fi is provided for distributing a signal from one port to multiple ports, comprising: a bottom signal input layer, an intermediate metal ground layer and an upper signal distribution layer, wherein the intermediate metal ground layer is disposed between the bottom signal input layer and the upper signal distribution layer to realize a communication connection between the bottom signal input layer and the upper signal distribution layer;

[0006] The upper signal distribution layer includes open-circuit stubs and transmission lines. The open-circuit stubs are arranged in a ring, and the transmission lines are folded and distributed within the ring of the open-circuit stubs.

[0007] The bottom signal input layer is used to transmit the input signal to the upper signal distribution layer to drive the power divider;

[0008] The upper signal distribution layer is used to divide the input signal into several equal-amplitude output signals.

[0009] Optionally, the upper signal distribution layer further includes a first dielectric substrate, a first feed circle, a first output port, a second output port, and a third output port, and the transmission line includes a first transmission line, a second transmission line, and a third transmission line;

[0010] The first power feed circle, the first output port, the second output port, the third output port, the first transmission line, the second transmission line, and the third transmission line are all disposed on the first dielectric substrate. The first power feed circle is disposed at the center of the first dielectric substrate. The first ends of the first transmission line, the second transmission line, and the third transmission line are all connected to the first power feed circle. The second ends of the first transmission line, the second transmission line, and the third transmission line are respectively connected to the first output port, the second output port, and the third output port.

[0011] Optionally, the transmission line further includes a fourth transmission line, a fifth transmission line, a sixth transmission line, a seventh transmission line, an eighth transmission line, and a ninth transmission line, and the open-circuit stub includes a first stub, a second stub, a third stub, a fourth stub, a fifth stub, and a sixth stub.

[0012] Wherein, the first end of the first stub is connected to the first output port, the second end of the first stub is connected to the first end of the fourth transmission line, the first end of the second stub is connected to the second output port, the second end of the second stub is connected to the first end of the fifth transmission line, the first end of the third stub is connected to the second output port, the second end of the third stub is connected to the first end of the sixth transmission line, the first end of the fourth stub is connected to the third output port, the second end of the fourth stub is connected to the first end of the seventh transmission line, the first end of the fifth stub is connected to the third output port, the second end of the fifth stub is connected to the first end of the eighth transmission line, the first end of the sixth stub is connected to the first output port, and the second end of the sixth stub is connected to the first end of the ninth transmission line.

[0013] Optionally, each of the first to the sixth stubs includes a plurality of first sub-stubs, second sub-stubs, and third sub-stubs;

[0014] The first sub-stub, the second sub-stub, and the third sub-stub are arranged in an inverted triangle shape, with the first end of the second sub-stub connected to the first sub-stub and the second end of the second sub-stub connected to the third sub-stub.

[0015] Optionally, the upper signal distribution layer further includes a first patch resistor, a second patch resistor, and a third patch resistor;

[0016] Wherein, the first end of the first surface mount resistor is connected to the second end of the fourth transmission line, the second end of the first surface mount resistor is connected to the second end of the fifth transmission line, the first end of the second surface mount resistor is connected to the second end of the sixth transmission line, the second end of the second surface mount resistor is connected to the second end of the seventh transmission line, the first end of the third surface mount resistor is connected to the second end of the eighth transmission line, and the second end of the third surface mount resistor is connected to the second end of the ninth transmission line.

[0017] Optionally, the bottom signal input layer includes a second dielectric substrate and a second feed circle;

[0018] The second feed circle is disposed on the second dielectric substrate, and the second feed circle and the first feed circle are disposed on the same vertical line.

[0019] Optionally, the underlying signal input layer further includes a tenth transmission line connected to the second feed circle to input a signal to the power divider.

[0020] Optionally, the intermediate metal grounding layer includes a through hole, and the through hole and the second feed circle and the first feed circle are arranged on the same vertical line.

[0021] Optionally, the first transmission line, the second transmission line, the third transmission line, and the tenth transmission line have the same characteristic impedance.

[0022] Optionally, the first transmission line, the second transmission line, and the third transmission line have the same folded shape and size, and the fourth to the ninth transmission lines have the same folded shape and size.

[0023] Optionally, the first surface mount resistor, the second surface mount resistor, and the third surface mount resistor have the same resistance value.

[0024] The open-stub odd-number power divider circuit for Wi-Fi provided by this invention reduces the length of the quarter-wavelength line in existing power dividers by adding the open-stub line to the power divider, thereby reducing the size of the power divider. In addition, this invention further reduces the size of the power divider by folding the transmission line and makes the internal structure of the power divider more compact. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of a Wilkinson power divider in the prior art;

[0027] Figure 2 This is a schematic diagram of the structure of a Luzzatto power divider in the prior art;

[0028] Figure 3 This is a schematic diagram of the structure of an open-circuit stub odd-number power divider circuit applied to Wi-Fi, as described in one embodiment of the present invention. Figure 1 ;

[0029] Figure 4 This is a schematic diagram of the structure of an open-circuit stub odd-number power divider circuit applied to Wi-Fi, as described in one embodiment of the present invention. Figure 2 ;

[0030] Figure 5 This is a schematic diagram of the structure of an open-circuit stub odd-number power divider circuit applied to Wi-Fi, as described in one embodiment of the present invention. Figure 3 ;

[0031] Figure 6 This is a schematic diagram of the structure of an open-circuit stub odd-number power divider circuit applied to Wi-Fi, as described in one embodiment of the present invention. Figure 4 ;

[0032] Figure 7 This is a schematic diagram of the structure of an open-circuit stub odd-number power divider circuit applied to Wi-Fi, as described in one embodiment of the present invention. Figure 5 ;

[0033] Figure 8 This is a schematic diagram of the structure of the open-circuit stub in the odd-number power divider circuit for Wi-Fi described in one embodiment of the present invention;

[0034] Figure 9 This is a performance parameter simulation of the open-stub odd-power divider circuit for Wi-Fi described in one embodiment of the present invention. Figure 1 ;

[0035] Figure 10 This is a performance parameter simulation of the open-stub odd-power divider circuit for Wi-Fi described in one embodiment of the present invention. Figure 2 ;

[0036] Figure 11 This is a performance parameter simulation of the open-stub odd-power divider circuit for Wi-Fi described in one embodiment of the present invention. Figure 3 .

[0037] Explanation of reference numerals in the attached figures:

[0038] 1-Upper-layer signal distribution layer;

[0039] 101 - Transmission line;

[0040] 1011 - First transmission line;

[0041] 1012 - Second transmission line;

[0042] 1013 - Third transmission line;

[0043] 1014 - Fourth transmission line;

[0044] 1015 - Fifth transmission line;

[0045] 1016 - Sixth transmission line;

[0046] 1017 - Seventh transmission line;

[0047] 1018 - Eighth transmission line;

[0048] 1019 - Ninth transmission line;

[0049] 102-Open circuit stub;

[0050] 1021 - First short stub;

[0051] 1022 - Second short stub;

[0052] 1023 - Third short line;

[0053] 1024 - Fourth short line;

[0054] 1025 - Fifth short line;

[0055] 1026 - Sixth short line;

[0056] 1027 - First sub-short line;

[0057] 1028 - Second sub-short line;

[0058] 1029 - Third sub-short line;

[0059] 103 - First dielectric substrate;

[0060] 104 - First feed circle;

[0061] 1051 - First output port;

[0062] 1052 - Second Output Port;

[0063] 1053 - Third Output Port;

[0064] 1061 - First surface mount resistor;

[0065] 1062 - Second surface mount resistor;

[0066] 1063 - Third surface mount resistor;

[0067] 2-Intermediate metal grounding layer;

[0068] 201 - Through hole;

[0069] 3- Bottom signal input layer;

[0070] 301 - Second dielectric substrate;

[0071] 302 - Second feed circle;

[0072] 303 - Tenth Transmission Line;

[0073] 401 - First quarter wavelength line;

[0074] 402 - Second quarter wavelength line;

[0075] 403 - Third quarter wavelength line;

[0076] 404 - First isolation resistor;

[0077] 405 second isolation resistor;

[0078] 406 - Third isolation resistor. Detailed Implementation

[0079] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0080] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0081] The technical solution of the present invention will be described in detail below with reference to specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0082] Prior to filing this application, the applicant conducted a thorough study of the circuit structure of the power divider and, based on this study, proposed... Figure 1 The circuit structure of the Wilkinson power divider shown is as follows: Figure 2 The circuit structure of the Luzzatto power divider shown is for... Figure 1 The circuit of the Wilkinson power divider shown includes a first quarter-wavelength line 401, a second quarter-wavelength line 402, a third quarter-wavelength line 403, a first isolation resistor 404, a second isolation resistor 405, and a third isolation resistor 406.

[0083] Please refer to Figure 1 The first quarter-wavelength line 401, the second quarter-wavelength line 402, and the third quarter-wavelength line 403 are distributed in parallel. The first isolation resistor 404 and the second isolation resistor 405 are connected in series. The first end of the first isolation resistor 404 is connected to the output end of the first quarter-wavelength line 401. The second end of the first isolation resistor 404 is connected to the output end of the second quarter-wavelength line 402 and the first end of the second isolation resistor 405. The second end of the second isolation resistor 405 is connected to the output end of the third quarter-wavelength line 403. The first end of the third isolation resistor 406 is connected to the first end of the first isolation resistor 404. The second end of the third isolation resistor 403 is connected to the second end of the second isolation resistor 405.

[0084] The Wilkinson power divider in the above scheme is a 1-to-3 power divider, which uses three isolation resistors. When the number of isolation resistors is more than 3, the isolation resistors need to be connected across each other, which makes the manufacturing process more difficult. In addition, the quarter-wavelength line in this scheme prevents the size of the power divider from being reduced.

[0085] Please refer to Figure 2 , Figure 2 This is a circuit diagram of a Luzzatto power divider, which uses an equivalent circuit method to divide... Figure 1 The Wilkinson power divider described in the paper is improved to a ring structure, which solves the problem of arranging isolation resistors between multiple output ports. However, since a quarter-wavelength line still exists, the size of the power divider cannot be reduced.

[0086] In view of this, the present invention proposes a circuit structure for an open-circuit stub odd-number power divider circuit applied to Wi-Fi, in Figure 2 Based on the Luzzatto power divider, the quarter-wavelength line is replaced with an open stub, and the transmission line is folded and arranged, reducing the size of the power divider without compromising performance standards.

[0087] The specific details of the solution of this invention are as follows:

[0088] Please refer to Figure 3 This invention provides an open-circuit stub odd power divider circuit for Wi-Fi, used to distribute signals from one port to multiple ports, including: a bottom signal input layer 3, an intermediate metal ground layer 2 and an upper signal distribution layer 1, wherein the intermediate metal ground layer 2 is disposed between the bottom signal input layer 3 and the upper signal distribution layer 1 to realize the communication connection between the bottom signal input layer 3 and the upper signal distribution layer 1;

[0089] The upper signal distribution layer 1 includes an open-circuit stub 102 and a transmission line 101. The open-circuit stub 102 is arranged in a ring, and the transmission line 101 is folded and distributed within the ring of the open-circuit stub.

[0090] The bottom signal input layer 3 is used to transmit the input signal to the upper signal distribution layer 1 to drive the power divider;

[0091] The upper signal distribution layer 1 is used to divide the input signal into several equal-amplitude output signals.

[0092] Regarding the open-circuit stub 102, please refer to... Figure 8 The open circuit stub 102 includes a plurality of first sub-stubs 1027, second sub-stubs 1028 and third sub-stubs 1029;

[0093] The first sub-stub 1027, the second sub-stub 1028, and the third sub-stub 1029 are arranged in a U-shape, with the first end of the second sub-stub 1028 connected to the first sub-stub 1027 and the second end of the second sub-stub 1029 connected to the third sub-stub 1029.

[0094] Specifically, the open stub 102 is also folded and distributed in space.

[0095] In the above scheme, based on the equivalent network theory, the open-circuit stub is added. The internal circuit structure of the open-circuit stub is arranged in a U-shape, which reduces the area of ​​the power divider. In addition, the transmission line and the open-circuit stub adopt a compact arrangement of folded wiring, which further reduces the circuit area of ​​the odd-numbered power divider circuit of the open-circuit stub applied to WiFi. Moreover, the power divider has a compact structure and good performance despite the reduced area.

[0096] In specific embodiments, the present invention can be used in odd-branch power distribution networks or antenna feed networks, and has wide applications in power combining, decomposition, and array antennas.

[0097] Specifically, the open-short-circuit odd power divider circuit for Wi-Fi can be applied to wireless networks such as Wi-Fi and Zigbee, and the materials used include different substrates such as printed circuit boards, gallium arsenide, and CMOS.

[0098] For information regarding the upper signal allocation layer 1, please refer to... Figure 4 The upper signal distribution layer further includes a first dielectric substrate 103, a first feed circle 104, a first output port 1051, a second output port 1052, and a third output port 1053. The transmission lines include a first transmission line 1011, a second transmission line 1012, and a third transmission line 1013.

[0099] The first power supply circle 104, the first output port 1051, the second output port 1052, the third output port 1053, the first transmission line 1011, the second transmission line 1012, and the third transmission line 1013 are all disposed on the first dielectric substrate 103. The first power supply circle 104 is disposed at the center of the first dielectric substrate 103. The first ends of the first transmission line 1011, the second transmission line 1012, and the third transmission line 1013 are all connected to the first power supply circle 104. The second ends of the first transmission line 1011, the second transmission line 1012, and the third transmission line 1013 are respectively connected to the first output port 1051, the second output port 1052, and the third output port 1053.

[0100] For specific embodiments, please refer to Figure 5 The transmission lines also include a fourth transmission line 1014, a fifth transmission line 1015, a sixth transmission line 1016, a seventh transmission line 1017, an eighth transmission line 1018, and a ninth transmission line 1019. The open-circuit stub 102 includes a first stub 1021, a second stub 1022, a third stub 1023, a fourth stub 1024, a fifth stub 1025, and a sixth stub 1026.

[0101] Wherein, the first end of the first stub 1021 is connected to the first output port 1051, the second end of the first stub 1021 is connected to the first end of the fourth transmission line 1014, the first end of the second stub 1022 is connected to the second output port 1052, the second end of the second stub 1022 is connected to the first end of the fifth transmission line 1015, the first end of the third stub 1023 is connected to the second output port 1052, and the second end of the third stub 1023 is connected to the first end of the sixth transmission line 1016. The first end of the fourth stub 1024 is connected to the third output port 1053, the second end of the fourth stub 1024 is connected to the first end of the seventh transmission line 1017, the first end of the fifth stub 1025 is connected to the third output port 1053, the second end of the fifth stub 1025 is connected to the first end of the eighth transmission line 1018, the first end of the sixth stub 1026 is connected to the first output port 1051, and the second end of the sixth stub 1026 is connected to the first end of the ninth transmission line 1019.

[0102] For other embodiments, please continue to refer to... Figure 5 The upper signal distribution layer 1 further includes a first patch resistor 1061, a second patch resistor 1062 and a third patch resistor 1063;

[0103] Specifically, the first end of the first surface mount resistor 1061 is connected to the second end of the fourth transmission line 1014, the second end of the first surface mount resistor 1061 is connected to the second end of the fifth transmission line 1015, the first end of the second surface mount resistor 1062 is connected to the second end of the sixth transmission line 1016, the second end of the second surface mount resistor 1062 is connected to the second end of the seventh transmission line 1017, the first end of the third surface mount resistor 1063 is connected to the second end of the eighth transmission line 1018, and the second end of the third surface mount resistor 1063 is connected to the second end of the ninth transmission line 1019.

[0104] In a specific embodiment, the first surface mount resistor 1061, the second surface mount resistor 1062, and the third surface mount resistor 1063 have the same resistance value.

[0105] In the above scheme, the first transmission line, the second transmission line, and the third transmission line connecting the first feed circle to each output port are folded and arranged so that the longitudinal length of the open stub odd power divider circuit applied to WiFi is reduced to 1 / 2 of the original length, thereby reducing the area of ​​the ring to 1 / 4 of the original length.

[0106] Furthermore, by folding the fourth transmission line to the ninth transmission line and the first open-circuit stub to the sixth open-circuit stub in a ring shape, the area of ​​the open-circuit stub odd-number power divider circuit applied to Wi-Fi is further reduced.

[0107] For information on the underlying signal input layer 3, please refer to [link / reference]. Figure 6 The bottom signal input layer 3 includes a second dielectric substrate 301 and a second feed circle 302;

[0108] The second feed circle 302 is disposed on the second dielectric substrate, and the second feed circle 302 and the first feed circle 104 are disposed on the same vertical line.

[0109] Regarding the selection of the dielectric substrate, in a specific embodiment, the first dielectric substrate 103 and the second dielectric substrate 301 are RO4350 high-frequency circuit boards with a dielectric constant of 3.66 and a thickness of 0.2-1mm, for example 0.508mm.

[0110] Of course, the present invention is not limited thereto, and other materials, dielectric constants and thicknesses of the first dielectric substrate 103 and the second dielectric substrate 301 are all within the protection scope of the present invention.

[0111] For other preferred embodiments, please refer to [link / reference]. Figure 6 The underlying signal input layer 3 further includes a tenth transmission line 303, which is connected to the second feed circle 302 to input a signal to the power divider.

[0112] In a specific embodiment, the first transmission line 1011, the second transmission line 1012, the third transmission line 1013, and the tenth transmission line 303 have the same characteristic impedance.

[0113] In other embodiments, the first transmission line 1011, the second transmission line 1012, and the third transmission line 1013 have the same folded shape and size, and the fourth transmission line 1014 to the ninth transmission line 1019 have the same folded shape and size.

[0114] For information on intermediate metal grounding layer 2, please refer to [link / reference]. Figure 7 The intermediate metal grounding layer 2 includes a through hole 201, and the through hole 201, the second feed circle 302, and the first feed circle 104 are arranged on the same vertical line.

[0115] In one embodiment, the transmission line, the open-circuit stub, the first patch resistor to the third patch resistor, and the intermediate metal ground layer are all made of copper.

[0116] For performance details regarding the open-stub odd-number power divider circuit used in Wi-Fi, please refer to [link / reference needed]. Figures 9-11 , Figures 9-11 The S-parameter simulation results of the open-stub odd power divider circuit applied to WiFi, using the simulation software HFSS 18.0, are shown in the figure; where, Figure 9 and Figure 10 The circuit diagram illustrates S11, S22, S33, S44, S21, S31, and S41 of the open-stub odd power divider circuit applied to Wi-Fi. As shown in the diagram, within the operating frequency band of 2.0-2.8GHz, the values ​​of S11, S22, S33, and S44 are all less than 10dB, and S21, S31, and S41 are all within -4.9±0.15dB (the ideal value is -4.77dB). This demonstrates that the open-stub odd power divider circuit applied to Wi-Fi exhibits excellent port matching performance and transmission characteristics.

[0117] Figure 11 The simulation results for S23, S24, and S34 of the open-circuit stub odd power divider circuit applied to Wi-Fi are shown in the figure. As can be seen from the figure, within the 2.0-2.8GHz range, S23, S24, and S34 are all less than -18dB, indicating that the output ports of the open-circuit stub odd power divider circuit applied to Wi-Fi have good isolation.

[0118] As can be seen, the open-circuit stub odd-number power divider circuit for Wi-Fi described in the above scheme does not suffer from reduced performance despite the reduction in area.

[0119] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An open-circuit stub odd-number power divider circuit for Wi-Fi, used to distribute a signal from one port to multiple ports, characterized in that, include: The system comprises a bottom signal input layer, an intermediate metal ground layer, and an upper signal distribution layer. The intermediate metal ground layer is located between the bottom signal input layer and the upper signal distribution layer to enable communication between them. The upper signal distribution layer includes open-circuit stubs, transmission lines, a first output port, a second output port, and a third output port. The open-circuit stubs are structures with open-circuit spurs on arc-shaped segments. The transmission lines are folded and distributed within the ring of the open-circuit stubs. Among the open-circuit stubs and transmission lines, the first end of the first stub is connected to the first output port, the second end of the first stub is connected to the first end of the fourth transmission line, the first end of the second stub is connected to the second output port, the second end of the second stub is connected to the first end of the fifth transmission line, the first end of the third stub is connected to the second output port, the second end of the third stub is connected to the first end of the sixth transmission line, the first end of the fourth stub is connected to the third output port, the second end of the fourth stub is connected to the first end of the seventh transmission line, the first end of the fifth stub is connected to the third output port, the second end of the fifth stub is connected to the first end of the eighth transmission line, the first end of the sixth stub is connected to the first output port, and the second end of the sixth stub is connected to the first end of the ninth transmission line. The bottom signal input layer is used to transmit the input signal to the upper signal distribution layer to drive the power divider; The upper signal distribution layer is used to divide the input signal into three equal-amplitude output signals.

2. The open-circuit stub odd-number power divider circuit for Wi-Fi as described in claim 1, characterized in that, The upper signal distribution layer also includes a first dielectric substrate and a first feed circle; The first power feed circle, the first output port, the second output port, the third output port, the first transmission line, the second transmission line, and the third transmission line are all disposed on the first dielectric substrate. The first power feed circle is disposed at the center of the first dielectric substrate. The first ends of the first transmission line, the second transmission line, and the third transmission line are all connected to the first power feed circle. The second ends of the first transmission line, the second transmission line, and the third transmission line are respectively connected to the first output port, the second output port, and the third output port.

3. The open-circuit stub odd-number power divider circuit for Wi-Fi as described in claim 2, characterized in that, Each of the first to the sixth stubs includes a plurality of first sub-stubs, second sub-stubs, and third sub-stubs; The first sub-stub, the second sub-stub, and the third sub-stub are arranged in an incline, with the first end of the second sub-stub connected to the first sub-stub and the second end of the second sub-stub connected to the third sub-stub.

4. The open-circuit stub odd-number power divider circuit for WiFi as described in claim 3, characterized in that, The upper signal distribution layer also includes a first patch resistor, a second patch resistor, and a third patch resistor; Wherein, the first end of the first surface mount resistor is connected to the second end of the fourth transmission line, the second end of the first surface mount resistor is connected to the second end of the fifth transmission line, the first end of the second surface mount resistor is connected to the second end of the sixth transmission line, the second end of the second surface mount resistor is connected to the second end of the seventh transmission line, the first end of the third surface mount resistor is connected to the second end of the eighth transmission line, and the second end of the third surface mount resistor is connected to the second end of the ninth transmission line.

5. The open-circuit stub odd-number power divider circuit for Wi-Fi according to claim 4, characterized in that, The bottom signal input layer includes a second dielectric substrate and a second feed circle; The second feed circle is disposed on the second dielectric substrate, and the second feed circle and the first feed circle are disposed on the same vertical line.

6. The open-circuit stub odd-number power divider circuit for Wi-Fi according to claim 5, characterized in that, The underlying signal input layer also includes a tenth transmission line, which is connected to the second feed circle to input a signal to the power divider.

7. The open-circuit stub odd-number power divider circuit for Wi-Fi according to claim 6, characterized in that, The intermediate metal grounding layer includes a through hole, and the through hole, the second feed circle, and the first feed circle are located on the same vertical line.

8. The open-circuit stub odd-number power divider circuit for WiFi according to claim 7, characterized in that, The first transmission line, the second transmission line, the third transmission line, and the tenth transmission line have the same characteristic impedance.

9. The open-circuit stub odd-number power divider circuit for WiFi as described in claim 7, characterized in that, The first transmission line, the second transmission line, and the third transmission line have the same folded shape and size, and the fourth to the ninth transmission lines have the same folded shape and size.

10. The open-circuit stub odd-number power divider circuit for Wi-Fi according to claim 7, characterized in that, The first surface mount resistor, the second surface mount resistor, and the third surface mount resistor have the same resistance value.

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