Circuit for impedance matching

Abstract

The present invention relates to an impedance matching circuit, comprising: a plurality of impedance elements, the plurality of impedance elements forming a mesh structure including a grid, the grid having sides and vertices, wherein at least one side of each grid is formed by at least one impedance element; at least one vertex in the mesh structure serves as an input end of the circuit, and at least another vertex serves as an output end of the circuit. The impedance matching circuit of the present invention can enable a signal to automatically select different paths during transmission, either traveling straight in a single path or taking multiple local detours and running in parallel, so that the signal is transmitted in the circuit along its respective optimal path, thereby achieving dynamic impedance matching and timing control of the signal and reducing signal distortion.

Description

Technical Field

[0001] The present invention generally relates to the field of signal processing. More specifically, the present invention relates to an impedance matching circuit. Background Art

[0002] Generally speaking, the signals transmitted in a circuit are complex energy - synthesized inter - modulation signals, which may contain fundamental signals and harmonic signals of multiple frequency components, and the amplitudes of the fundamental signals and harmonic signals of each frequency component may also be different. The so - called "inter - modulation" refers to the mutual influence and mutual modulation between the signals with different frequencies and / or different amplitude values. Each component in the existing circuit has its own frequency and amplitude characteristics. For signals with different frequencies and amplitudes, the responses and indexes of each component are also different, and the impedance characteristics of a single component change with the change of signal frequency and amplitude.

[0003] During the process of signal transmission in a circuit, the existing circuit usually treats the signal as a single - frequency signal. Since at a single frequency and amplitude, the impedance value in the circuit is a fixed value, the impedance values of the signals of other frequency and amplitude components in the signal do not match the impedance value of the circuit, which may generate local standing waves. These standing waves are superimposed on the signals of each frequency and amplitude component, and finally cause the signals of multiple frequency and amplitude components in the signal, especially the harmonic component signals, to be filtered out, attenuated or enhanced at a certain moment, resulting in distortion of the original signal during transmission. Therefore, the existing circuit can only transmit a single - frequency signal without distortion, and is unable to handle the synthetic inter - modulation signal composed of multiple frequency and amplitude components.

[0004] In addition, when the signals of multiple frequency and amplitude components in the inter - modulation signal flow through the same circuit, due to their different reactance values, the arrival timings at the receiving end are different. Before the signals enter the circuit, the phases of the signals of each frequency and amplitude component are consistent with each other. After being processed by the circuit, since the overall reactance characteristics of the circuit have different timing responses for the signals of different frequency and amplitude components, the phases and time delays of the signals of each frequency and amplitude component arriving at the output end of the circuit are inconsistent, which will cause the energy attenuation of the signals of each frequency and amplitude component, especially the harmonic component signals, resulting in inter - modulation distortion of the total signal synthesized by restoring the signals of each frequency component. Summary of the Invention

[0005] To solve one or more problems in the above-mentioned background art, the present invention provides an impedance matching circuit. The circuit is a network structure composed of a plurality of impedance elements. By setting the number and impedance values of the impedance elements in each part and each layer of the network structure, respective optimal channels for signals of different frequencies and / or amplitudes similar to urban pipe networks are formed, so as to dynamically adjust the impedance values of each channel, and further achieve impedance matching for signals of different frequencies and / or amplitudes and consistency adjustment of their timing relationships, thereby achieving the purpose of balanced signal transmission.

[0006] Specifically, the present invention discloses an impedance matching circuit. The circuit includes: a plurality of impedance elements, the plurality of impedance elements constituting a network structure including a grid, the grid having sides and vertices, wherein at least one side of each grid is constituted by at least one impedance element; and at least one vertex in the network structure serving as an input end of the circuit, and at least another vertex serving as an output end of the circuit.

[0007] In one embodiment, the impedance values of at least two of the plurality of impedance elements are different, so that signals of different frequencies and / or amplitudes pass through different paths in the network structure.

[0008] In another embodiment, the grid is one or more of a triangle, a quadrilateral, a pentagon, or a hexagon.

[0009] In yet another embodiment, the impedance elements constitute a three-dimensional network structure formed by sequentially connecting multiple layers of the network structure.

[0010] In another embodiment, multiple impedance elements are used to connect between adjacent two layers of the network structure.

[0011] In another embodiment, each layer of the network structure is arranged on a board, so that multiple boards are connected to form the three-dimensional network structure.

[0012] In another embodiment, there are multiple input ends and output ends.

[0013] In yet another embodiment, the input end and the output end are arranged at the diagonals of the network structure, so that the impedance elements between the input end and the output end form the most combinations.

[0014] In yet another embodiment, some of the plurality of impedance elements are connected into a filter circuit to perform noise filtering operations on the signals of different frequencies.

[0015] In yet another embodiment, the impedance element is at least one of the following: capacitor; inductor; capacitor and inductor; resistor and capacitor; resistor and inductor; resistor, capacitor, and inductor.

[0016] When using the impedance - matching circuit of the present invention for signal transmission, while impedance - matching the input signals with different frequencies and / or amplitudes, it is also possible to perform timing adjustment on the input signals and the output signals, and then restore the signals that have undergone circuit dynamic impedance - matching processing and transmission without distortion. Secondly, the impedance - matching circuit of the present invention has a flexible configuration, and it can conveniently select impedance elements and other corresponding connection devices according to the frequency range of the signals to be processed and the differences in application circuits, so as to achieve the purpose of impedance - matching and timing adjustment of the signals.

[0017] The circuit of the present invention has a wide range of application scenarios. It can be applied to the fields of communication and signal processing, surveying and mapping, medical, sports and fitness, industrial instrumentation, and other fields that require processing of analog inter - modulation signals. In addition, the circuit layout of the present invention is flexible. It can be arranged at different positions in the application circuits of the above - mentioned fields through multiple input terminals and output terminals. Brief Description of the Drawings

[0018] By reading the following detailed description with reference to the accompanying drawings, the above - mentioned and other objects, features, and advantages of the exemplary embodiments of the present invention will become readily understandable. In the drawings, several embodiments of the present invention are shown in an exemplary rather than restrictive manner, and the same or corresponding reference numerals represent the same or corresponding parts, where:

[0019] Figure 1 is a schematic structural diagram of an impedance - matching circuit according to an embodiment of the present invention;

[0020] Figure 2 is a two - dimensional structural diagram of an impedance - matching circuit according to an embodiment of the present invention;

[0021] Figure 3 is a three - dimensional structural diagram of an impedance - matching circuit according to an embodiment of the present invention;

[0022] Figure 4 is an exemplary signal flow diagram of an impedance - matching circuit according to an embodiment of the present invention; and

[0023] Figure 5 is another exemplary signal flow diagram of an impedance - matching circuit according to an embodiment of the present invention. Detailed Embodiments

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] Figure 1 is a schematic structural diagram of an impedance matching circuit 100 according to an embodiment of the present invention. It can be understood that although Figure 1 a limited number of impedance elements and meshes are drawn therein, the number of the impedance elements and meshes may be different according to different circuits to which the present invention is applied. As Figure 1 shown, the impedance matching circuit 100 of the present invention may include: a plurality of impedance elements 101, and the plurality of impedance elements form a mesh structure including a mesh 102. The mesh may have sides 103 and vertices 104. At least one side of each mesh may be composed of at least one impedance element. At least one vertex in the mesh structure may be used as an input terminal 105 of the circuit, and at least another vertex may be used as an output terminal 106 of the circuit.

[0026] In one embodiment, the mesh may be one or more of a triangle, a quadrilateral, a pentagon, a hexagon, or other shapes. As Figure 1 shown, for example, the mesh may be a quadrilateral mesh composed of 4 sides. There are 9 such meshes, and they are connected to each other through common sides to form a mesh structure. A vertex at one corner of the mesh structure may be used as the input terminal of the circuit, and a vertex at another corner of the mesh structure may be used as the output terminal of the circuit.

[0027] In one embodiment, an impedance element may be connected to each side of each mesh through a wire. The impedance elements may be arranged in a matrix, for example, a 4×4 matrix. Each row of the matrix includes 3 impedance elements, and each column includes 4 impedance elements. At least two of the impedance elements have different impedance values, and the impedance elements may be at least one of the following: a capacitor; an inductor; a capacitor and an inductor; a resistor and a capacitor; a resistor and an inductor; a resistor, a capacitor, and an inductor. The input terminal, the output terminal, the wire, and the impedance elements may form multiple paths for the signal flowing through the circuit of the present invention.

[0028] By configuring the number and impedance values of the impedance elements, at least two of the multiple signal paths of the circuit have different impedance values, and according to the differences of specific application circuits, the number and impedance values of the capacitors, inductors and resistors can also be configured differently, so that each of the multiple signal paths has different impedance values. In this way, when signals with different frequencies and / or amplitudes flow through the circuit of the present invention, they can reach the output end along different paths with different impedance values from the input end, thereby realizing the impedance matching between signals with different frequencies and / or amplitudes and the application circuit, and ensuring the distortion-free transmission of signals.

[0029] In one embodiment, some of the multiple impedance elements can be connected into a filter circuit to filter out noise from signals with different frequencies and / or amplitudes flowing through. The filter circuit can, for example, include a low-pass filter circuit composed of a resistor and a capacitor, which is configured to filter out high-frequency noise; or can also include a band-pass filter circuit composed of an inductor and a capacitor, which is configured to filter out out-of-band noise of the band-pass filter circuit.

[0030] Figure 2 is a two-dimensional structure diagram showing the impedance matching circuit 200 according to an embodiment of the present invention. Figure 2 The circuit 200 in Figure 1 can be understood as Figure 1 an exemplary implementation of the circuit 100 in Figure 2 Therefore, the details of the circuit 100 described in combination with

[0031] also apply to the description of the circuit 200 in Figure 2 As shown in Figure 2 The impedance matching circuit of the present invention can include a two-dimensional planar network structure composed of m rows and n columns. The impedance elements in the network structure can be arranged in a matrix, for example, it can be the m×n matrix shown in

[0032] In one embodiment, the four impedance elements may be connected by wires to form a quadrilateral grid, and the grid includes sides and vertices. Further, the two-dimensional planar mesh structure may be formed by interconnecting the quadrilateral grids, where adjacent grids have common sides. Specifically, as Figure 2 the impedance elements ZX11, ZX21, ZY11, and ZY12 in are sequentially connected by wires to form a quadrilateral grid; similarly, the impedance elements ZX12, ZX22, ZY12, and ZY13 are also sequentially connected by wires to form a quadrilateral grid. The above two grids have a common side including the impedance element ZY12, and the two grids are connected into a mesh structure through this common side.

[0033] In one embodiment, each grid has four vertices. The input end of the impedance matching circuit may be led out from any one of the vertices of the grid and is configured to receive the signal input to the impedance matching circuit. The output end of the impedance matching circuit may be led out from another vertex of the grid and is configured to output the signal after being processed by the impedance matching circuit. Further, the input end may be multiple, and the output end may be one or more to meet the reception and output of multiple signals. Specifically, for example, the input end may be Figure 2 multiple of A, B, C, D, E, F, G, and H in, and the output end may be one or more of A to H, and the input end and the output end are different.

[0034] In one embodiment, the input end and the output end are arranged at the diagonals of the mesh structure so that the impedance elements between the input end and the output end form the most combinations, thereby achieving a more accurate impedance matching purpose. For example, the input end is arranged at end A and the output end is arranged at end F; or the input end is arranged at end B and the output end is arranged at end E. Through such an arrangement, the path that the signal flows through in the mesh structure can be made longer or the impedance elements that the signal flows through can be made more, so as to achieve a more accurate impedance matching for the signal.

[0035] In one embodiment, the input end, the output end, the wires, and the multiple impedance elements may form multiple signal paths for the signal flowing through the circuit of the present invention. Each of the multiple impedance elements may include: at least one type of impedance element such as a capacitor and an inductor, and at least one or more impedance elements of this type may be included in the at least one type of impedance element; or each of the multiple impedance elements may further include at least two types of impedance elements such as a capacitor, an inductor, and a resistor, and in each of the at least two types of impedance elements, at least one or more impedance elements of this type are included.

[0036] By configuring the number and impedance values of the impedance elements, at least two of the multiple signal paths of the circuit have different impedance values. Moreover, according to different specific application circuits, the number and impedance values of the capacitors, inductors, and resistors can be configured differently so that each of the multiple signal paths has a different impedance value. In one embodiment, the signal may include a composite signal composed of multiple harmonic signals with different frequencies and / or amplitudes, where each harmonic signal flows through one of the multiple paths from the input end to the output end to perform impedance matching on each harmonic signal, thereby ensuring that the signal is transmitted without distortion.

[0037] In one embodiment, some of the multiple impedance elements can be connected to form a filter circuit to filter out noise from signals with different frequencies and / or amplitudes flowing through. The filter circuit can, for example, include a low-pass filter circuit composed of a resistor and a capacitor, which is configured to filter out high-frequency noise; or it can also include a band-pass filter circuit composed of an inductor and a capacitor, which is configured to filter out out-of-band noise of the band-pass filter circuit.

[0038] Figure 3 is a three-dimensional structure diagram showing an impedance-matching circuit 300 according to an embodiment of the present invention. Figure 3 The circuit 300 in Figure 1 can be understood as Figure 2 an exemplary implementation of the circuit 100 in Figure 1 and can also be understood as Figure 2 an extended implementation of the circuit 200 in Figure 3 Therefore, the details of the circuits 100 and 200 described in combination with

[0039] As Figure 2 an extended implementation of the circuit 200 in Figure 2 The structure of the impedance-matching circuit 300 of the present invention can be a three-dimensional network structure formed by sequentially connecting the network structures shown in multiple layers in

[0040] As shown in Figure 3As shown, the structure of the impedance matching circuit 300 of the present invention may be a three-dimensional structure composed of three dimensions X, Y, and Z. Among them, in the X dimension, it includes m rows, in the Y dimension, it includes n columns, and in the Z dimension, it includes t verticals. Each row in the X dimension is composed of impedance elements ZXmnt, each column in the Y dimension is composed of impedance elements ZYmnt, and each vertical in the Z dimension is composed of impedance elements ZZmnt, where m, n, and t are positive integers greater than or equal to 1. In particular, when m = n = t, the three-dimensional structure is a cube.

[0041] Specifically, in the X dimension, the first vertical of the first row may include impedance elements ZX111, ZX121... ZX1(n - 1)1, and ZX1n1 arranged in sequence. The first vertical of the second row may include impedance elements ZX211, ZX221... ZX2(n - 1)1, and ZX2n1 arranged in sequence,... and so on. The first vertical of the mth row may include impedance elements ZXm11, ZXm21... ZXm(n - 1)1, and ZXmn1 arranged in sequence. It can be understood that although the second, third... t verticals of the first row, the second, third... t verticals of the second row, and the second, third... t verticals of the third, fourth... m rows are not drawn in the figure, but according to the above arrangement rules, the numbers and layout structures of these non-drawn impedance elements can be obtained.

[0042] In the Y dimension, the first vertical of the first column may include impedance elements ZY111, ZY211... ZY(m - 1)11, and ZYm11 arranged in sequence. The first vertical of the second column may include impedance elements ZY121, ZY221... ZY(n - 1)21, and ZYn21 arranged in sequence,... and so on. The first vertical of the nth column may include impedance elements ZY1n1, ZY2n1... ZY(m - 1)n1, and ZYmn1 arranged in sequence. It can be understood that although the second, third... t verticals of the first column, the second, third... t verticals of the second column, and the second, third... t verticals of the third, fourth... m columns are not drawn in the figure, but according to the above arrangement rules, the numbers and layout structures of these non-drawn impedance elements can be obtained.

[0043] In the Z dimension, the first vertical row and the m-th row may include impedance elements ZZm11, ZZm21... ZZm(n-1)1, and ZZmn1 arranged in sequence. The second vertical row and the m-th row may include impedance elements ZZm12, ZZm22... ZZm(n-1)2, and ZZmn2 arranged in sequence,... and so on. The t-th vertical row and the m-th row may include impedance elements ZZm1t, ZZm2t... ZZm(n-1)t, and ZZmnt arranged in sequence. It can be understood that although the first, second... (m-1) rows of the first vertical row, the first, second... (m-1) rows of the second vertical row, and the first, second... (m-1) rows of the third, fourth... t-th vertical rows are not drawn in the figure, according to the above arrangement rules, the numbers and layout structures of these undrawn impedance elements can be obtained.

[0044] In one embodiment, the input end and the output end may be disposed at any two different vertices of the three-dimensional structure. The two different vertices may be away from each other. In particular, they may be respectively disposed at the diagonal vertices of the three-dimensional structure. For example, the input end is disposed at vertex A and the output end is disposed at vertex F; or the input end is disposed at vertex C and the output end is disposed at vertex G. By such an arrangement, the impedance elements between the input end and the output end form the most combinations, so that the path that the signal flows through in the three-dimensional structure is longer, or in other words, the impedance elements that the signal flows through are more, so as to perform more accurate impedance matching on the signal.

[0045] In one embodiment, the input end, the output end, the wires, and the multiple impedance elements may form multiple three-dimensional signal paths for the signal flowing through the circuit of the present invention. Each of the multiple impedance elements may include: at least one type of reactance element such as a capacitor and an inductor, and at least one or more reactance elements of the at least one type of impedance element; or each of the multiple impedance elements may further include at least two types of impedance elements such as a capacitor, an inductor, and a resistor, and in each of the at least two types of impedance elements, at least one or more impedance elements of the type are included.

[0046] By configuring the number and impedance values of the impedance elements, at least two of the multiple three-dimensional signal paths of the circuit signal have different impedance values, and according to the differences of specific application circuits, the numbers and impedance values of the capacitor, inductor, and resistor can be configured differently, so that each of the multiple signal paths has different impedance values. In one embodiment, the signal may include a composite signal composed of multiple harmonic signals with different frequencies and / or amplitudes, and each of the harmonic signals flows from the input end through one of the multiple paths to the output end, so as to perform impedance matching on each of the harmonic signals, thereby ensuring that the signal is transmitted without distortion.

[0047] In one embodiment, some of the plurality of impedance elements may be connected to form a filter circuit for filtering noise from signals of different frequencies and / or amplitudes flowing therethrough. The filter circuit may, for example, include a low-pass filter circuit composed of a resistor and a capacitor, which is configured to filter high-frequency noise; or may further include a band-pass filter circuit composed of an inductor and a capacitor, which is configured to filter out-of-band noise of the band-pass filter circuit.

[0048] Figure 4 is an exemplary signal flow diagram showing an impedance matching circuit according to an embodiment of the present invention. It can be understood that Figure 4 the shown signal flow diagram is drawn based on Figure 2 the impedance matching circuit shown, and thus Figure 4 the circuit structure in Figure 2 is the same as the circuit structure in Figure 4 . For the description of the impedance matching circuit in Figure 2 , please refer to the relevant description in

[0049] and will not be elaborated here. Figure 4 As shown, signals of three different frequencies enter the mesh structure from the input terminal D, then flow through different signal paths formed by impedance elements, and finally are output from the output terminal H. To distinguish signals of different frequencies, the three different frequency signals transmitted in the mesh structure are represented by thick solid lines, thin solid lines, and dashed lines respectively. It can be obtained from Figure 4 that the three different frequency signals represented by the thick solid line, thin solid line, and dashed line, although all enter from the input terminal and are all output from the output terminal, flow through different signal paths in the mesh structure. Since the number and impedance values of the impedance elements on each different frequency signal path can be different, the total impedance value of each signal path is also different, thereby achieving impedance matching for the three different frequency signals respectively and ensuring distortion-free transmission of the signals.

[0050] In one embodiment, the signal input to the input terminal may be, for example, one or more composite signals, and the composite signal may be composed of a fundamental wave signal of a certain frequency and a plurality of harmonic signals of different frequencies. When the composite signal is input to the impedance matching circuit of the present invention, the fundamental wave and harmonic signals of different frequencies can automatically select paths for transmission according to the different impedance values of the impedance elements, thereby achieving the purpose of impedance matching for the fundamental wave and harmonic signals of different frequencies respectively. In addition, when the fundamental wave and harmonic signals of different frequencies flow through different types and numbers of impedance elements, the generated timings will be different. By setting a reasonable number and type of impedance elements, the timings of the fundamental wave and harmonic signals of different frequencies at the output terminal are made consistent with their timings at the input terminal, so as to completely restore the composite signal at the output terminal.

[0051] In another embodiment, the signal input to the input terminal may also be, for example, harmonic signals of multiple different frequencies, where the harmonic signals of multiple different frequencies respectively come from different synthesized signals; or the signal input to the input terminal may also be a combination of one or more synthesized signals and harmonic signals of multiple different frequencies, where the harmonic signals respectively come from another one or more synthesized signals. The working principle is the same as the case where the signal input to the input terminal is one or more synthesized signals, and will not be elaborated here.

[0052] As a specific implementation, taking Figure 4 the signal flow of a local circuit in Figure 4 as an example, the principle of impedance matching of the signal by the impedance matching circuit will be described. As shown in Figure 4 , take the thick solid line path composed of ZX11, ZX21, ZX31, ZX32, ZY11, ZY12, ZY21 and ZY22. Further, for convenience of description, ignoring the timing influence of this path, ZX11, ZX21, ZX31 and ZX32 can be set as resistors with a resistance value of 0. Additionally, ZY11, ZY12 and ZY21 are set as capacitor elements C, and ZY22 is set as a resistor element R. Assume that the value of ZY11 is 470 uF, the value of ZY12 is 10 uF, the value of ZY21 is 220 uF, and the value of ZY22 is 1 kΩ. Then the impedance value that the signal flows through from point A at the input terminal to the intersection of ZX32 and ZY23 is the combined impedance value after the parallel connection of 470 uF and 10 uF, and then the series connection with the parallel impedance value of 220 u and 1 k. Obviously, on the one hand, by setting different capacitance values and resistance values, the paths of different frequency signals can be changed; on the other hand, by setting different capacitance values of different magnitudes, the tiny changes in the timing of different frequency signals can be generated by utilizing their response differences.

[0053] Figure 5 is another exemplary signal flow diagram showing the impedance matching circuit according to an embodiment of the present invention. It should be noted that Figure 5 the signal flow diagram of Figure 4 is an exemplary implementation based on the signal flow diagram of Figure 5 , where the frequencies of the three different signals in are the same as the frequencies of the three different signals in Figure 4 and correspond one by one. Different from the signal flow diagram in Figure 4 , the signals of different frequencies shown in Figure 5 have different amplitudes from the signals of corresponding frequencies in Figure 4 . Therefore, even if signals of the same frequency flow through the same impedance matching circuit, the signal paths they flow through are different.

[0054] As shown in Figure 5As shown, in one embodiment, signals of three different frequencies enter the impedance matching circuit of the mesh structure from the input terminal D, then flow through different signal paths formed by impedance elements, and finally output from the output terminal H. In order to distinguish signals of different frequencies, the three different frequency signals transmitted in the mesh structure are represented by thick solid lines, thin solid lines, and dotted lines respectively. Compared with Figure 4 it can be concluded that Figure 5 the paths of the three different frequency signals in Figure 4 are not exactly the same as those in Figure 5 because the three different frequency signals in Figure 4 have different amplitudes from the corresponding three different frequency signals in Since the number and impedance values of the impedance elements on each signal path can be different, the total impedance value of each signal path is also different, thus achieving impedance matching for signals with the same frequency but different amplitudes and ensuring distortion-free transmission of the signals.

[0055] It should be understood that the terms "first", "second", "third", "fourth", etc. in the claims, the specification and the drawings of the present invention are used to distinguish different objects, rather than to describe a specific order. The terms "comprising" and "including" used in the specification and claims of the present invention indicate the presence of the described features, wholes, steps, operations, components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, components and / or their combinations.

[0056] It should also be understood that the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification and claims of the present invention, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms. It should be further understood that the term "and / or" used in the specification and claims of the present invention refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0057] As used in this specification and the claims, the term "if" can be interpreted as "when", "once", "in response to determining" or "in response to detecting" depending on the context. Similarly, the phrase "if determined" or "if [the described condition or event] is detected" can be interpreted as meaning "once determined", "in response to determining", "once [the described condition or event] is detected" or "in response to detecting [the described condition or event]" depending on the context.

[0058] Although the embodiments of the present invention are as described above, the above content is only an example adopted for the convenience of understanding the present invention, and is not intended to limit the scope and application scenarios of the present invention. Any person skilled in the art within the technical field of the present invention can make any modifications and changes in the form of implementation and details without departing from the spirit and scope disclosed by the present invention. However, the scope of patent protection of the present invention shall still be subject to the scope defined by the appended claims.

Claims

1. An impedance matching circuit, comprising: a plurality of impedance elements, the plurality of impedance elements constituting a mesh structure including a grid, the grid having sides and vertices, each of the plurality of impedance elements including at least two types of impedance elements among capacitors, inductors, and resistors, where at least one side of each of the grids is constituted by at least one impedance element; and at least one vertex in the mesh structure serves as the input terminal of the circuit, and at least another vertex serves as the output terminal of the circuit; an impedance element is connected by a wire on each side of each of the grids, and the input terminal, output terminal, wire, and impedance element constitute a plurality of signal paths for the signal flowing through the circuit, wherein, the impedance values of at least two of the plurality of impedance elements are different, and by configuring the number and impedance values of the impedance elements, at least two of the plurality of signal paths of the circuit have different impedance values, so that signals with different frequencies and / or amplitudes in the intermodulation signal pass through different paths in the mesh structure.

2. The circuit according to claim 1, wherein, The grid is one or more of a triangle, a quadrilateral, a pentagon, or a hexagon.

3. The circuit according to claim 1, wherein The impedance elements constitute a three-dimensional mesh structure formed by sequentially connecting multiple layers of the mesh structure.

4. The circuit according to claim 3, wherein, Adjacent two layers of the mesh structure are connected by a plurality of impedance elements.

5. The circuit according to claim 3 or 4, wherein, Each layer of the mesh structure is disposed on a board, so that a plurality of the boards are connected to form the three-dimensional mesh structure.

6. The circuit according to any one of claims 1-4, wherein, The input terminal and the output terminal are multiple.

7. The circuit according to claim 5, wherein The input terminal and the output terminal are multiple.

8. The circuit according to any one of claims 1-4, wherein The input terminal and the output terminal are disposed at the diagonal corners of the mesh structure, so that the impedance elements between the input terminal and the output terminal form the most combinations.

9. The circuit according to claim 5, wherein, The input terminal and the output terminal are disposed at the diagonal corners of the mesh structure, so that the impedance elements between the input terminal and the output terminal form the most combinations.

10. The circuit according to claim 6, wherein, The input terminal and the output terminal are disposed at the diagonal corners of the mesh structure, so that the impedance elements between the input terminal and the output terminal form the most combinations.

11. The circuit according to any one of claims 1-4, wherein, Some of the plurality of impedance elements are connected into a filter circuit to perform an operation of filtering noise on the signals with different frequencies and / or amplitudes.

12. The circuit according to claim 5, wherein, Some of the plurality of impedance elements are connected into a filter circuit to perform an operation of filtering noise on the signals with different frequencies and / or amplitudes.

13. The circuit according to claim 6, wherein, Some of the plurality of impedance elements are connected into a filter circuit to perform an operation of filtering noise on the signals with different frequencies and / or amplitudes.

14. The circuit according to claim 8, wherein, Some of the plurality of impedance elements are connected into a filter circuit to perform an operation of filtering noise on the signals with different frequencies and / or amplitudes.

15. The circuit according to any one of claims 1-4, wherein, The impedance element is at least one of the following: a capacitor; an inductor; a capacitor and an inductor; a resistor and a capacitor; a resistor and an inductor; and a resistor, a capacitor, and an inductor.

16. The circuit according to claim 5, wherein, The impedance element is at least one of the following: a capacitor; an inductor; a capacitor and an inductor; a resistor and a capacitor; a resistor and an inductor; and a resistor, a capacitor, and an inductor.

17. The circuit according to claim 6, wherein, The impedance element is at least one of the following: a capacitor; an inductor; a capacitor and an inductor; a resistor and a capacitor; a resistor and an inductor; and a resistor, a capacitor, and an inductor.

18. The circuit according to claim 8, wherein, The impedance element is at least one of the following: Capacitance; Inductance; Capacitance and inductance; Resistance and capacitance; Resistance and inductance; and Resistance, capacitance and inductance.

19. The circuit according to claim 11, wherein, The impedance element is at least one of the following: Capacitance; Inductance; Capacitance and inductance; Resistance and capacitance; Resistance and inductance; and Resistance, capacitance and inductance.

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