Method, system and device for testing insertion loss of radio frequency connector

Abstract

The invention relates to an insertion loss test method, system and device for a radio frequency connector. The insertion loss test method comprises the following steps: converting a first scattering parameter matrix of a first test circuit board at a plurality of frequency points into a first cascade parameter matrix; converting a second scattering parameter matrix of a second test circuit board at a plurality of frequency points into a second cascade parameter matrix, wherein the difference of the unit length of the first transmission line and the unit length of the second transmission line is 1; according to the first cascading parameter matrix and the second cascading parameter matrix at each frequency point, obtaining a third cascading parameter matrix of a section of unit length transmission line at each frequency point; a first test circuit board is used as a non-zero length straight-through calibration piece, a second test circuit board is used as a line calibration piece, and a fourth cascade parameter matrix of cascade connection of a section of unit length transmission line and a radio frequency connector at a plurality of frequency points is obtained through a TL de-embedding calibration method; and according to the fourth cascade parameter matrix and the third cascade parameter matrix, obtaining the insertion loss of the single radio frequency connector at the plurality of frequency points.

Description

Technical Field

[0001] The present application relates to the field of terminal technology, and in particular to a method, system and device for testing insertion loss of a radio frequency connector. Background Art

[0002] In the RF microwave and higher frequency bands, in order to ensure the accuracy and reliability of the de-embedding results, the commonly used de-embedding methods are TRL de-embedding and TL de-embedding. Among them, the TL de-embedding method requires testing of zero-length straight-through calibration components and line calibration components to simultaneously extract the S parameters of the test fixture and the device under test.

[0003] However, in actual test scenarios, the zero-length straight-through calibration component is difficult to process and assemble, which makes the TL de-embedding method difficult to implement and affects the accurate extraction of the insertion loss of the RF structure. Summary of the invention

[0004] The present application provides a method, system and device for testing insertion loss of a radio frequency connector to address deficiencies in the related art.

[0005] According to a first aspect of an embodiment of the present application, a method for testing insertion loss of a radio frequency connector is provided, comprising:

[0006] Converting a first scattering parameter matrix of a first test circuit board at multiple frequency points into a first cascade parameter matrix, wherein the first test circuit board comprises a radio frequency connector and a first transmission line, wherein an output end and an input end of the first transmission line are respectively connected to the radio frequency connector;

[0007] Converting a second scattering parameter matrix of a second test circuit board at multiple frequency points into a second cascade parameter matrix, wherein the second test circuit board includes a radio frequency connector and a second transmission line, wherein an output end and an input end of the second transmission line are respectively connected to the radio frequency connector, and a difference in unit length between the first transmission line and the second transmission line is 1;

[0008] According to the first cascade parameter matrix and the second cascade parameter matrix at each frequency point, obtaining a third cascade parameter matrix of a unit length transmission line at each frequency point;

[0009] Using the first test circuit board as a non-zero length through calibration piece and the second test circuit board as a line calibration piece, a fourth cascade parameter matrix of a unit length transmission line cascaded with a radio frequency connector at multiple frequency points is obtained by a TL de-embedding calibration method;

[0010] The insertion loss of a single radio frequency connector at multiple frequency points is obtained according to the fourth cascade parameter matrix and the third cascade parameter matrix.

[0011] Optionally, acquiring a third cascade parameter matrix of a unit length transmission line at any frequency point according to the first cascade parameter matrix and the second cascade parameter matrix at any frequency point includes:

[0012] Obtain an intermediate cascade parameter matrix according to a first cascade parameter matrix and a second cascade parameter matrix at a plurality of frequency points;

[0013] The intermediate cascade parameter matrix and the third cascade parameter matrix are similar matrices, and the third cascade parameter matrix is ​​a diagonal matrix. The third cascade parameter matrix is ​​obtained based on the eigenvalues ​​of the intermediate parameter matrix.

[0014] Optionally, obtaining the insertion loss of a single RF connector at multiple frequency points according to the fourth cascade parameter matrix and the third cascade parameter matrix includes:

[0015] According to the fourth cascade parameter matrix and the third cascade parameter matrix, a fifth cascade parameter matrix of a single radio frequency connector at multiple frequency points is obtained;

[0016] Converting the fifth cascade parameter matrix into a third scattering parameter matrix of a single radio frequency connector at multiple frequency points;

[0017] The amplitude of the forward transmission coefficient in the third scattering parameter matrix is ​​logarithmically operated to obtain the insertion loss of the radio frequency connector at any frequency point.

[0018] Optionally, obtaining a fifth cascade parameter matrix of a single RF connector at multiple frequency points according to the fourth cascade parameter matrix and the third cascade parameter matrix includes:

[0019] According to the fourth cascade parameter matrix T 3 =T con T L , T con =T in =T out ,get Among them, T con is the cascade parameter of a single RF connector, T L is the cascade parameter of a transmission line of unit length.

[0020] According to a second aspect of an embodiment of the present application, there is provided an insertion loss test system for a radio frequency connector, comprising:

[0021] A first test circuit board, wherein the first test circuit board comprises a radio frequency connector and a first transmission line, wherein an output end and an input end of the first transmission line are respectively connected to the radio frequency connector;

[0022] a second test circuit board, the second test circuit board comprising a radio frequency connector and a second transmission line, an output end and an input end of the second transmission line are respectively connected to the radio frequency connector, and a difference in unit length between the first transmission line and the second transmission line is 1;

[0023] a first fixing device, the first fixing device being used to fix the first test circuit board;

[0024] a second fixing device, the second fixing device being used to fix the second test circuit board;

[0025] A first vector network analyzer, wherein two ports of the first vector network analyzer are connected to two radio frequency connectors of the first test circuit board in a one-to-one correspondence, and the first vector network analyzer is used to obtain the first scattering parameter matrix;

[0026] A second vector network analyzer, wherein two ports of the second vector network analyzer are connected to two radio frequency connectors of the second test circuit board in a one-to-one correspondence, and the second vector network analyzer is used to obtain the second scattering parameter matrix;

[0027] A processor, wherein the processor is used to implement the steps of the method described in any one of the above embodiments.

[0028] According to a third aspect of an embodiment of the present application, there is provided an insertion loss test device for a radio frequency connector, comprising:

[0029] A first conversion module, converting a first scattering parameter matrix of a first test circuit board at multiple frequency points into a first cascade parameter matrix, wherein the first test circuit board includes a radio frequency connector and a first transmission line, and an output end and an input end of the first transmission line are respectively connected to the radio frequency connector;

[0030] A first conversion module converts a second scattering parameter matrix of a second test circuit board at multiple frequency points into a second cascade parameter matrix, wherein the second test circuit board includes a radio frequency connector and a second transmission line, an output end and an input end of the second transmission line are respectively connected to the radio frequency connector, and a difference in unit length between the first transmission line and the second transmission line is 1;

[0031] A first acquisition module, acquiring a third cascade parameter matrix of a unit length transmission line at each frequency point according to the first cascade parameter matrix and the second cascade parameter matrix at each frequency point;

[0032] A second acquisition module uses the first test circuit board as a non-zero length through calibration piece and the second test circuit board as a line calibration piece to obtain a fourth cascade parameter matrix of a unit length transmission line cascaded with a radio frequency connector at multiple frequency points through a TL de-embedding calibration method;

[0033] The calculation module obtains the insertion loss of a single radio frequency connector at multiple frequency points according to the fourth cascade parameter matrix and the third cascade parameter matrix.

[0034] Optionally, the first acquisition module includes:

[0035] A first calculation unit obtains an intermediate cascade parameter matrix according to a first cascade parameter matrix and a second cascade parameter matrix at a plurality of frequency points;

[0036] In the second calculation unit, the intermediate cascade parameter matrix and the third cascade parameter matrix are similar matrices, and the third cascade parameter matrix is ​​a diagonal matrix, and the third cascade parameter matrix is ​​obtained based on the eigenvalues ​​of the intermediate parameter matrix.

[0037] Optionally, the calculation module includes:

[0038] A third calculation unit, obtaining a fifth cascade parameter matrix of a single radio frequency connector at multiple frequency points according to the fourth cascade parameter matrix and the third cascade parameter matrix;

[0039] A conversion unit, converting the fifth cascade parameter matrix into a third scattering parameter matrix of a single radio frequency connector at multiple frequency points;

[0040] The fourth calculation unit performs a logarithmic operation on the amplitude of the forward transmission coefficient in the third scattering parameter matrix to obtain the insertion loss of the radio frequency connector at any frequency point.

[0041] Optionally, the third calculation unit includes: according to the fourth cascade parameter matrix T 3 =T con T L , T con =T in =T out ,get Among them, T con is the cascade parameter of a single RF connector, T L is the cascade parameter of a transmission line of unit length.

[0042] According to a fourth aspect of an embodiment of the present application, a computer-readable storage medium is provided, on which computer instructions are stored, and when the instructions are executed by a processor, the steps of any of the methods described above are implemented.

[0043] The technical solution provided by the embodiments of the present application may have the following beneficial effects:

[0044] It can be seen from the above embodiments that in the technical solution of the present application, the TL de-embedding calibration method can be applied to obtain the insertion loss of the RF connector; and in the insertion loss test method of the RF connector, a zero-length straight-through calibration component is not required, which solves the problem that the zero-length straight-through calibration component in the prior art is difficult to assemble and process.

[0045] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0047] Figure 1 The present invention is a flow chart of a method for testing insertion loss of a radio frequency connector according to an exemplary embodiment.

[0048] Figure 2 The invention is a block diagram of an insertion loss test system of a radio frequency connector according to an exemplary embodiment.

[0049] Figure 3 is a schematic structural diagram of a first fixing device according to an exemplary embodiment.

[0050] Figure 4 is a schematic structural diagram of a second fixing device according to an exemplary embodiment.

[0051] Figure 5 The invention is a block diagram of an insertion loss test device of a radio frequency connector according to an exemplary embodiment.

[0052] Figure 6 The figure is a block diagram of another insertion loss test device for a radio frequency connector according to an exemplary embodiment.

[0053] Figure 7 It is a block diagram of another insertion loss testing device of a radio frequency connector according to an exemplary embodiment. DETAILED DESCRIPTION

[0054] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0055] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms of "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0056] It should be understood that although the terms first, second, third, etc. may be used in the present application to describe various information, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0057] Figure 1 The present invention is a flow chart of a method for testing insertion loss of a radio frequency connector according to an exemplary embodiment.

[0058] like Figure 1 As shown, the insertion loss test method may include the following steps:

[0059] In step 101, a first scattering parameter matrix of a first test circuit board at multiple frequency points is converted into a first cascade parameter matrix, wherein the first test circuit board includes a radio frequency connector and a first transmission line, wherein an output end and an input end of the first transmission line are respectively connected to the radio frequency connector.

[0060] In step 102, a second scattering parameter matrix of a second test circuit board at multiple frequency points is converted into a second cascade parameter matrix, wherein the second test circuit board includes a radio frequency connector and a second transmission line, wherein an output end and an input end of the second transmission line are respectively connected to the radio frequency connector, and a difference in unit length between the first transmission line and the second transmission line is 1.

[0061] In this embodiment, the RF connector connected to the first transmission line and the RF connector connected to the second transmission line are the same RF connectors. For example, the RF connector can be an air dielectric SMA connector (3.5-KFD3G). The first transmission line and the second transmission line use the same cable type, and the only difference is the electrical length, wherein the electrical length of the transmission line per unit length can be selected according to the test frequency, the actual processing and assembly difficulty and cost. The characteristic impedance of the first transmission line and the second transmission line is 50 ohms, which can match the impedance of the general RF connector and the test instrument port to avoid the decrease in the accuracy of the RF connector insertion loss extraction due to the significant reflection of the signal; the type of transmission line can be selected from the type of transmission line that is easy to process on a flat printed circuit board, such as a microstrip line, a coplanar waveguide, a grounded coplanar waveguide, etc. For example, the first transmission line can be a two-segment unit length transmission line, and the second transmission line can be a three-segment unit length transmission line.

[0062] Regarding the acquisition of the first scattering parameter matrix and the second scattering parameter matrix, in some embodiments, the first scattering parameter matrix can be obtained by testing through a one-to-one electrical connection between the two ports of the vector analyzer and the two RF connectors of the first test circuit board; similarly, the second scattering parameter matrix can be obtained by testing through a one-to-one electrical connection between the two ports of the vector analyzer and the two RF connectors of the second test circuit board.

[0063] Taking the test frequency in the range of 0.6-3GHz and the frequency interval of 10MHz as an example, a total of 141 frequency points can be measured at the first scattering parameter matrix and the second scattering parameter matrix, and then converted to 141 first cascade parameter matrices and second cascade parameter matrices. Among them, since the test system is a two-port system, the first scattering parameter matrix and the second scattering parameter matrix are both second-order matrices. Of course, only the first cascade parameter matrix and the second cascade parameter matrix at 141 frequency points are used as an example for explanation. In other embodiments, it can also be the first cascade parameter matrix and the second cascade parameter matrix at other numbers of frequency points.

[0064] In step 103, a third cascade parameter matrix of a unit length transmission line at each frequency point is obtained according to the first cascade parameter matrix and the second cascade parameter matrix at each frequency point.

[0065] In this embodiment, the first test circuit board can be regarded as a cascade of an input RF connector, two unit length transmission lines and an output RF connector. Therefore, according to the properties of the cascade parameters, the first cascade parameter matrix T 1 Represented as T 1 =T in T L T L T out ; Similarly, the second cascade parameter matrix T2 It can be expressed as T 2 =T in T L T L T L T out ; Among them, T L represents the third cascade parameter matrix of a unit length transmission line, T in Indicates the cascade parameters of the input RF connector, T out Represents the cascade parameter matrix of the output RF connector. According to the transmission line theory, T L is a diagonal matrix with diagonal parameter e γl , γ is the propagation coefficient of the transmission line, and l is the length of the transmission line.

[0066] The first cascade parameter matrix T at the aforementioned 141 frequency points 1 and the second cascade parameter matrix T 2 For example, for the first cascade parameter matrix T 1 and the second cascade parameter matrix T 2 Calculate and get the intermediate cascade parameter matrix Since the first transmission line and the second transmission line differ by 1 unit length, the T temp and T L is a similarity matrix, so T temp and T L have the same eigenvalues, and T L It is a diagonal matrix, so T can be solved by software temp The characteristic value of the transmission line per unit length is further obtained by cascading the parameters T L .

[0067] In step 104, the first test circuit board is used as a non-zero length through calibration component and the second test circuit board is used as a line calibration component, and a fourth cascade parameter matrix of a unit length transmission line cascaded with a radio frequency connector at multiple frequency points is obtained through a TL de-embedding calibration method.

[0068] In this embodiment, the first test circuit board is used as a non-zero length through calibration component, and the second test circuit board is used as a line calibration component. The TL de-embedding calibration method is applied to the first cascade parameter matrix T at 141 frequency points. 1 and the second cascade parameter matrix T 2 By calculation, the fourth cascade parameter matrix T of the cascade of a unit length transmission line and the RF connector at the 141 frequency point can be obtained. 3 .

[0069] Among them, the cascade parameters of a unit length transmission line and an output RF connector are taken as an example of the fourth cascade parameter matrix. Since the input RF connector and the output RF connector in this application are the same, the fourth cascade parameter matrix can also be understood as the cascade parameter matrix of a unit length transmission line and an input RF connector.

[0070] In step 105, the insertion loss of a single radio frequency connector at multiple frequency points is obtained according to the fourth cascade parameter matrix and the third cascade parameter matrix.

[0071] In this embodiment, the fourth-level parameter matrix T 3 and the third cascade parameter matrix T of a unit length transmission line L , the fifth cascade parameter matrix of a single RF connector can be obtained. Among them, the fourth cascade parameter matrix can be rewritten as T 3 =T L T out , since the output RF connector and the input RF connector in this application are the same, the cascade parameter matrix T of a single RF connector is con =T in =T out , so we get T 3 =T con T L , where the third cascade parameter matrix T L It is known that the fourth-level parameter matrix T 3 Known, the fifth-order cascade parameter data matrix T of a single RF connector can be calculated con .

[0072] Furthermore, the fifth cascade parameter matrix T con Converted into the third scattering parameter matrix S of a single RF connector at multiple frequency points con , the third scattering parameter matrix S con The logarithmic operation is performed on the amplitude of the forward transmission coefficient in to obtain the insertion loss of the RF connector at any frequency point. The logarithmic operation is IL = 20lg (S 21 ), where IL is the insertion loss, S 21 is the forward transmission coefficient. In this way, the insertion loss of the RF connector at 141 frequency points can be obtained, that is, the corresponding relationship between frequency and insertion loss can be obtained. Subsequently, the insertion loss corresponding to the RF connector can be found from this corresponding relationship according to the operating frequency.

[0073] It can be seen from the above embodiments that in the technical solution of the present application, the TL de-embedding calibration method can be applied to obtain the insertion loss of the RF connector; and in the insertion loss test method of the RF connector, a zero-length straight-through calibration component is not required, which solves the problem that the zero-length straight-through calibration component in the prior art is difficult to assemble and process.

[0074] Based on the technical solution of this application, such as Figure 2-Figure 4 As shown, an insertion loss test device for a radio frequency connector is also provided. The insertion loss test system includes a first test circuit board 1, a second test circuit board 2, a first fixing device 3, a second fixing device 4, a first vector network analyzer 5, a second vector network analyzer 6 and a processor 7, wherein the first test circuit board 1 includes a radio frequency connector and a first transmission line, and the output end and the input end of the first transmission line are respectively connected to the radio frequency connector; the second test circuit board 2 includes a radio frequency connector and a second transmission line, and the output end and the input end of the second transmission line are respectively connected to the radio frequency connector, and the difference in unit length between the first transmission line and the second transmission line is 1; the radio frequency connector connected to the first transmission line is the same as the radio frequency connector connected to the second transmission line, and the radio frequency connector connected to the output end and the input end of the same transmission line are the same.

[0075] The first fixing device 3 is used to fix the first test circuit board 1, for example, it can be fixed by screws or clamping; the second fixing device 4 is used to fix the second test circuit board 2, for example, it can be fixed by screws or clamping. The two ports of the first vector network analyzer 5 are connected to the two RF connectors of the first test circuit board 1 in a one-to-one correspondence, and the first vector network analyzer 5 is used to obtain the first scattering parameter matrix; the two ports of the second vector network analyzer 6 are connected to the two RF connectors of the second test circuit board 2 in a one-to-one correspondence, and the second vector network analyzer 6 is used to obtain the second scattering parameter matrix. The processor 7 can be electrically connected to the first vector network analyzer 5 and the second vector network analyzer 6 respectively, so as to obtain the first scattering parameter matrix and the second scattering parameter matrix, and the steps of the method described in any of the aforementioned embodiments can be executed by the processor 7.

[0076] Before obtaining the first scattering parameter matrix and the second scattering parameter matrix, the first vector network analyzer 5 and the second vector network analyzer 6 may be calibrated. For example, the vector network analyzer model used in the test is Keysight P5024A, and the calibration method is SOLT calibration method, the purpose of which is to remove the influence of the RF cable at the port of the vector network analyzer on the test.

[0077] In some embodiments, Figure 3 and Figure 4 As shown, the first fixing device 3 and the second fixing device 4 can adopt basically the same structure, and the difference is that their lengths are adapted to the lengths of the corresponding test circuit boards. Figure 3 is a first fixing device 3, Figure 4The first fixing device 3 is the second fixing device 4. Since the length of the first transmission line is shorter than that of the second transmission line by one unit, the first fixing device 3 is shorter than the second fixing device 4. Taking the first fixing device 3 as an example, the first fixing device 3 includes a first housing 31, a first test board fixing member 32 and a first RF connector fixing member 33. The first test circuit board 1 is fixed by the first test board fixing member 32, and the RF connector on the first test circuit board 1 is fixed by the first RF connector fixing member 33. The first housing 31 can support and protect the first test circuit board 1. Similarly, Figure 4 As shown, the second fixing device 4 includes a second housing 41 , a second test board fixing member 42 and a second RF connector fixing member 43 .

[0078] Corresponding to the above-mentioned embodiment of the insertion loss test method, the present application also provides an embodiment of an insertion loss test device.

[0079] Figure 5 FIG. 1 is a block diagram of an insertion loss test device according to an exemplary embodiment. Figure 5 The insertion loss test device includes a first conversion module 51, a first conversion module 52, a first acquisition module 53, a second acquisition module 54 and a calculation module 55, wherein:

[0080] A first conversion module 51 converts a first scattering parameter matrix of a first test circuit board at multiple frequency points into a first cascade parameter matrix, wherein the first test circuit board includes a radio frequency connector and a first transmission line, and an output end and an input end of the first transmission line are respectively connected to the radio frequency connector;

[0081] A first conversion module 52 converts a second scattering parameter matrix of a second test circuit board at multiple frequency points into a second cascade parameter matrix, wherein the second test circuit board includes a radio frequency connector and a second transmission line, an output end and an input end of the second transmission line are respectively connected to the radio frequency connector, and a difference in unit length between the first transmission line and the second transmission line is 1;

[0082] A first acquisition module 53 acquires a third cascade parameter matrix of a unit length transmission line at each frequency point according to the first cascade parameter matrix and the second cascade parameter matrix at each frequency point;

[0083] The second acquisition module 54 uses the first test circuit board as a non-zero length through calibration component and the second test circuit board as a line calibration component to obtain a fourth cascade parameter matrix of a unit length transmission line cascaded with a radio frequency connector at multiple frequency points through a TL de-embedding calibration method;

[0084] The calculation module 55 obtains the insertion loss of a single radio frequency connector at multiple frequency points according to the fourth cascade parameter matrix and the third cascade parameter matrix.

[0085] like Figure 6 As shown, Figure 6 is a block diagram of another insertion loss test device according to an exemplary embodiment. Figure 5 Based on the illustrated embodiment, the first acquisition module 53 may include a first calculation unit 531 and a second calculation unit 532, wherein:

[0086] The first calculation unit 531 obtains an intermediate cascade parameter matrix according to the first cascade parameter matrix and the second cascade parameter matrix at multiple frequency points.

[0087] In the second calculation unit 532, the intermediate cascade parameter matrix and the third cascade parameter matrix are similar matrices, and the third cascade parameter matrix is ​​a diagonal matrix, and the third cascade parameter matrix is ​​obtained based on the eigenvalues ​​of the intermediate parameter matrix.

[0088] like Figure 7 As shown, Figure 7 is a block diagram of another insertion loss test device according to an exemplary embodiment. Figure 5 Based on the illustrated embodiment, the calculation module 55 may include a third calculation unit 551, a conversion unit 552 and a fourth calculation unit 553, wherein:

[0089] A third calculating unit 551 obtains a fifth cascade parameter matrix of a single RF connector at multiple frequency points according to the fourth cascade parameter matrix and the third cascade parameter matrix;

[0090] A conversion unit 552 converts the fifth cascade parameter matrix into a third scattering parameter matrix of a single radio frequency connector at multiple frequency points;

[0091] The fourth calculation unit 553 performs a logarithmic operation on the amplitude of the forward transmission coefficient in the third scattering parameter matrix to obtain the insertion loss of the RF connector at any frequency point.

[0092] It should be noted that the above Figure 7 The structures of the third calculating unit 551, the converting unit 552 and the fourth calculating unit 553 in the device embodiment shown in FIG. 5 may also be included in the aforementioned Figure 6 In the device embodiment, this application is not limited to this.

[0093] Among them, according to the fourth cascade parameter matrix T 3 =T con T L , T con =T in =T out ,get Among them, T con is the cascade parameter of a single RF connector, TL is the cascade parameter of a transmission line of unit length.

[0094] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0095] For the device embodiment, since it basically corresponds to the method embodiment, the relevant parts can refer to the partial description of the method embodiment. The device embodiment described above is only schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present application scheme. A person of ordinary skill in the art can understand and implement it without paying any creative work.

[0096] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the disclosure disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0097] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A method for testing insertion loss of a radio frequency connector, characterized in that: include: Converting a first scattering parameter matrix of a first test circuit board at multiple frequency points into a first cascade parameter matrix, wherein the first test circuit board comprises a radio frequency connector and a first transmission line, wherein an output end and an input end of the first transmission line are respectively connected to the radio frequency connector; Converting a second scattering parameter matrix of a second test circuit board at multiple frequency points into a second cascade parameter matrix, wherein the second test circuit board includes a radio frequency connector and a second transmission line, wherein an output end and an input end of the second transmission line are respectively connected to the radio frequency connector, and a difference in unit length between the first transmission line and the second transmission line is 1; According to the first cascade parameter matrix and the second cascade parameter matrix at each frequency point, obtaining a third cascade parameter matrix of a unit length transmission line at each frequency point; Using the first test circuit board as a non-zero length through calibration piece and the second test circuit board as a line calibration piece, a fourth cascade parameter matrix of a unit length transmission line cascaded with a radio frequency connector at multiple frequency points is obtained by a TL de-embedding calibration method; The insertion loss of a single radio frequency connector at multiple frequency points is obtained according to the fourth cascade parameter matrix and the third cascade parameter matrix.

2. The testing method according to claim 1, characterized in that: The step of obtaining a third cascade parameter matrix of a unit length transmission line at any frequency point according to the first cascade parameter matrix and the second cascade parameter matrix at any frequency point comprises: Obtain an intermediate cascade parameter matrix according to a first cascade parameter matrix and a second cascade parameter matrix at a plurality of frequency points; The intermediate cascade parameter matrix and the third cascade parameter matrix are similar matrices, and the third cascade parameter matrix is ​​a diagonal matrix. The third cascade parameter matrix is ​​obtained based on the eigenvalues ​​of the intermediate parameter matrix.

3. The testing method according to claim 1, characterized in that: The obtaining, according to the fourth cascade parameter matrix and the third cascade parameter matrix, the insertion loss of a single radio frequency connector at multiple frequency points includes: According to the fourth cascade parameter matrix and the third cascade parameter matrix, a fifth cascade parameter matrix of a single radio frequency connector at multiple frequency points is obtained; Converting the fifth cascade parameter matrix into a third scattering parameter matrix of a single radio frequency connector at multiple frequency points; The amplitude of the forward transmission coefficient in the third scattering parameter matrix is ​​logarithmically operated to obtain the insertion loss of the radio frequency connector at any frequency point.

4. The testing method according to claim 3, characterized in that: The step of obtaining a fifth cascade parameter matrix of a single radio frequency connector at multiple frequency points according to the fourth cascade parameter matrix and the third cascade parameter matrix includes: According to the fourth cascade parameter matrix T3 = T con T L , T con =T in =T out ,get Among them, T con is the cascade parameter of a single RF connector, T L is the cascade parameter of a transmission line of unit length.

5. An insertion loss test system for a radio frequency connector, characterized in that: include: A first test circuit board, wherein the first test circuit board comprises a radio frequency connector and a first transmission line, wherein an output end and an input end of the first transmission line are respectively connected to the radio frequency connector; a second test circuit board, the second test circuit board comprising a radio frequency connector and a second transmission line, an output end and an input end of the second transmission line are respectively connected to the radio frequency connector, and a difference in unit length between the first transmission line and the second transmission line is 1; a first fixing device, the first fixing device being used to fix the first test circuit board; a second fixing device, the second fixing device being used to fix the second test circuit board; A first vector network analyzer, wherein two ports of the first vector network analyzer are connected to two radio frequency connectors of the first test circuit board in a one-to-one correspondence, and the first vector network analyzer is used to obtain the first scattering parameter matrix; A second vector network analyzer, wherein two ports of the second vector network analyzer are connected to two radio frequency connectors of the second test circuit board in a one-to-one correspondence, and the second vector network analyzer is used to obtain the second scattering parameter matrix; A processor, wherein the processor is configured to implement the steps of the method according to any one of claims 1 to 4.

6. An insertion loss test device for a radio frequency connector, characterized in that: include: A first conversion module, converting a first scattering parameter matrix of a first test circuit board at multiple frequency points into a first cascade parameter matrix, wherein the first test circuit board includes a radio frequency connector and a first transmission line, and an output end and an input end of the first transmission line are respectively connected to the radio frequency connector; A first conversion module converts a second scattering parameter matrix of a second test circuit board at multiple frequency points into a second cascade parameter matrix, wherein the second test circuit board includes a radio frequency connector and a second transmission line, an output end and an input end of the second transmission line are respectively connected to the radio frequency connector, and a difference in unit length between the first transmission line and the second transmission line is 1; A first acquisition module, acquiring a third cascade parameter matrix of a unit length transmission line at each frequency point according to the first cascade parameter matrix and the second cascade parameter matrix at each frequency point; A second acquisition module uses the first test circuit board as a non-zero length through calibration piece and the second test circuit board as a line calibration piece to obtain a fourth cascade parameter matrix of a unit length transmission line cascaded with a radio frequency connector at multiple frequency points through a TL de-embedding calibration method; The calculation module obtains the insertion loss of a single radio frequency connector at multiple frequency points according to the fourth cascade parameter matrix and the third cascade parameter matrix.

7. The insertion loss test device according to claim 6, characterized in that: The first acquisition module includes: A first calculation unit obtains an intermediate cascade parameter matrix according to a first cascade parameter matrix and a second cascade parameter matrix at a plurality of frequency points; In the second calculation unit, the intermediate cascade parameter matrix and the third cascade parameter matrix are similar matrices, and the third cascade parameter matrix is ​​a diagonal matrix, and the third cascade parameter matrix is ​​obtained based on the eigenvalues ​​of the intermediate parameter matrix.

8. The insertion loss test device according to claim 6, characterized in that: The calculation module comprises: A third calculation unit, obtaining a fifth cascade parameter matrix of a single radio frequency connector at multiple frequency points according to the fourth cascade parameter matrix and the third cascade parameter matrix; A conversion unit, converting the fifth cascade parameter matrix into a third scattering parameter matrix of a single radio frequency connector at multiple frequency points; The fourth calculation unit performs a logarithmic operation on the amplitude of the forward transmission coefficient in the third scattering parameter matrix to obtain the insertion loss of the radio frequency connector at any frequency point.

9. The insertion loss test device according to claim 8, characterized in that: The third calculation unit comprises: according to the fourth cascade parameter matrix T3=T con T L , T con =T in =T out ,get Among them, T con is the cascade parameter of a single RF connector, T L is the cascade parameter of a transmission line of unit length.

10. A computer-readable storage medium having computer instructions stored thereon, characterized in that: When the instruction is executed by a processor, the steps of the method according to any one of claims 1 to 4 are implemented.

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