Insertion loss test method, system and apparatus for radio frequency connectors

Abstract

The application relates to a method, system and device for testing the insertion loss of a radio frequency connector. The method comprises converting a first scattering parameter matrix of a first test circuit board at multiple frequencies into a first cascaded parameter matrix; converting a second scattering parameter matrix of a second test circuit board at the multiple frequencies into a second cascaded parameter matrix, wherein the difference between the unit length of the first transmission line and the unit length of the second transmission line is 1; obtaining a third cascaded parameter matrix of a unit length transmission line at each frequency according to the first cascaded parameter matrix and the second cascaded parameter matrix at each frequency; using the first test circuit board as a non-zero length through calibration device and the second test circuit board as a line calibration device, and obtaining a fourth cascaded parameter matrix of the unit length transmission line and the radio frequency connector at the multiple frequencies through a TL de-embedding calibration method; and obtaining the insertion loss of a single radio frequency connector at the multiple frequencies according to the fourth cascaded parameter matrix and the third cascaded parameter matrix.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of terminals, and in particular to a method, system and device for testing insertion loss of a radio frequency connector. BACKGROUND

[0002] In the radio frequency microwave and higher frequency bands, in order to ensure the accuracy and reliability of the de-embedding result, the commonly used de-embedding methods mainly include TRL de-embedding method and TL de-embedding method. Among them, the TL de-embedding method can extract the S parameters of the test fixture and the measured object at the same time through the test of the zero-length through calibration piece and the line calibration piece.

[0003] However, in the actual test scene, the zero-length through calibration piece is difficult to process and assemble, which leads to the difficulty in implementing the TL de-embedding method and affects the accurate extraction of the insertion loss of the radio frequency structure. SUMMARY

[0004] The present application provides a method, system and device for testing insertion loss of a radio frequency connector to solve the problems 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 a plurality of frequency points into a first cascaded parameter matrix, the first test circuit board comprising a radio frequency connector and a first transmission line, the output end and the input end of the first transmission line being connected to the radio frequency connector respectively;

[0007] converting a second scattering parameter matrix of a second test circuit board at a plurality of frequency points into a second cascaded parameter matrix, the second test circuit board comprising a radio frequency connector and a second transmission line, the output end and the input end of the second transmission line being connected to the radio frequency connector respectively, and the difference between the unit lengths of the first transmission line and the second transmission line being 1;

[0008] obtaining a third cascaded parameter matrix of a unit length transmission line at each frequency point according to the first cascaded parameter matrix and the second cascaded parameter matrix at the 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, and obtaining a fourth cascaded parameter matrix of a unit length transmission line and the radio frequency connector in cascade at a plurality of frequency points through a TL de-embedding calibration method;

[0010] obtaining the insertion loss of a single radio frequency connector at a plurality of frequency points according to the fourth cascaded parameter matrix and the third cascaded parameter matrix.

[0011] Optionally, the third cascaded parameter matrix of a unit length of transmission line at any frequency point is obtained according to the first cascaded parameter matrix and the second cascaded parameter matrix at the frequency point, and the third cascaded parameter matrix comprises:

[0012] The intermediate cascaded parameter matrix is obtained according to the first cascaded parameter matrix and the second cascaded parameter matrix at multiple frequency points.

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

[0014] Optionally, the insertion loss of a single radio frequency connector at multiple frequency points is obtained according to the fourth cascaded parameter matrix and the third cascaded parameter matrix, and the insertion loss comprises:

[0015] The fifth cascaded parameter matrix of a single radio frequency connector at multiple frequency points is obtained according to the fourth cascaded parameter matrix and the third cascaded parameter matrix.

[0016] The fifth cascaded parameter matrix is converted 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, the fifth cascaded parameter matrix of a single radio frequency connector at multiple frequency points is obtained according to the fourth cascaded parameter matrix and the third cascaded parameter matrix, and the fifth cascaded parameter matrix comprises:

[0019] The fourth cascaded parameter matrix , is obtained according to the fourth cascaded parameter matrix , wherein, is the cascaded parameter of a single radio frequency connector, is the cascaded parameter of a unit length of transmission line.

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

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

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

[0023] A first fixing device for fixing the first test circuit board;

[0024] A second fixing device for fixing the second test circuit board;

[0025] A first vector network analyzer, two ports of the first vector network analyzer are connected with two radio frequency connectors of the first test circuit board one by one, and the first vector network analyzer is used for acquiring the first scattering parameter matrix;

[0026] A second vector network analyzer, two ports of the second vector network analyzer are connected with two radio frequency connectors of the second test circuit board one by one, and the second vector network analyzer is used for acquiring the second scattering parameter matrix;

[0027] A processor used for implementing the steps of the above method.

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

[0029] A first conversion module, which converts the first scattering parameter matrix of the first test circuit board at a plurality of frequency points into a first cascade parameter matrix, the first test circuit board comprises a radio frequency connector and a first transmission line, and the output end and the input end of the first transmission line are connected with the radio frequency connector respectively;

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

[0031] A first acquisition module, which 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 the frequency point;

[0032] A second acquisition module, which acquires a fourth cascade parameter matrix of a unit length transmission line and a radio frequency connector in cascade at a plurality of frequency points by using the first test circuit board as a non-zero length through calibration piece, the second test circuit board as a line calibration piece, and a TL de-embedding calibration method;

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

[0034] Optionally, the first acquisition module comprises:

[0035] The first calculation unit obtains an intermediate concatenated parameter matrix according to the first concatenated parameter matrix and the second concatenated parameter matrix at the plurality of frequency points;

[0036] The second calculation unit obtains the third concatenated parameter matrix based on eigenvalues of the intermediate parameter matrix, wherein the intermediate concatenated parameter matrix and the third concatenated parameter matrix are similar matrices, and the third concatenated parameter matrix is a diagonal matrix.

[0037] Optionally, the calculation module comprises:

[0038] The third calculation unit obtains a fifth concatenated parameter matrix of a single radio frequency connector at the plurality of frequency points according to the fourth concatenated parameter matrix and the third concatenated parameter matrix.

[0039] The conversion unit converts the fifth concatenated parameter matrix into a third scattering parameter matrix of the single radio frequency connector at the plurality of frequency points.

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

[0041] Optionally, the third calculation unit comprises: , wherein, is a concatenated parameter of the single radio frequency connector, is a concatenated parameter of a section of unit length transmission line.

[0042] According to a fourth aspect of the embodiments of the present application, a computer readable storage medium is provided, which stores computer instructions, and the instructions are executed by a processor to implement the steps of the above method.

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

[0044] As can be seen from the above embodiments, in the technical scheme of the present application, the TL de-embedding calibration method can be applied to obtain the insertion loss of the radio frequency connector, and in the process of the insertion loss test method of the radio frequency connector, a zero-length through calibration piece is not required, thereby solving the problem that the zero-length through calibration piece is difficult to assemble and process in the prior art.

[0045] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0046] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present application and, together with the specification, serve to explain the principles of the present application.​

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

[0048] Figure 2 is a block diagram of a system for insertion loss testing of a radio frequency connector according to an example embodiment.

[0049] Figure 3 is a structural diagram of a first fixture according to an example embodiment.

[0050] Figure 4 is a structural diagram of a second fixture according to an example embodiment.

[0051] Figure 5 is a block diagram of an apparatus for insertion loss testing of a radio frequency connector according to an example embodiment.

[0052] Figure 6 is a block diagram of another apparatus for insertion loss testing of a radio frequency connector according to an example embodiment.

[0053] Figure 7 is a block diagram of still another apparatus for insertion loss testing of a radio frequency connector according to an example embodiment. DETAILED DESCRIPTION

[0054] The example embodiments will be described in detail herein with reference to the attached drawings. The description of the example embodiments is intended to apply to various alternative embodiments as well. It is to be understood that other equipment and processes can be utilized, and changes can be made without departing from the scope of the present disclosure. The following detailed description is not to be taken in a limiting sense, and the scope of the present disclosure is defined only by the claims.

[0055] The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting. As used in the present disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0056] It should be understood that, although the terms first, second, third, etc. can be used herein to describe various information, the information should not be limited to these terms. These terms are only used to differentiate one piece of information from another piece of information. For example, without departing from the scope of the present application, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information. Depending on the context, the word "if' as used herein can be interpreted as "when" or "upon" or "in response to determining".

[0057] Figure 1 is a flow chart of a method for insertion loss test of a radio frequency connector according to an exemplary embodiment. As shown in Figure 1 the method for insertion loss test can comprise the following steps:

[0058] In step 101, a first scattering parameter matrix of a first test circuit board at a plurality of frequency points is converted into a first cascaded parameter matrix, the first test circuit board comprising a radio frequency connector and a first transmission line, an output end and an input end of the first transmission line being connected to the radio frequency connector respectively.

[0059] In step 102, a second scattering parameter matrix of a second test circuit board at a plurality of frequency points is converted into a second cascaded parameter matrix, 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 being connected to the radio frequency connector respectively, a difference between unit lengths of the first transmission line and the second transmission line being 1.

[0060] In this embodiment, the radio frequency connector connected to the first transmission line and the radio frequency connector connected to the second transmission line are the same radio frequency connector, for example, the radio frequency connector can be an air medium SMA connector (3.5-KFD3G). The first transmission line and the second transmission line adopt the same cable type, and the difference is only in the electrical length, wherein the electrical length of the unit length transmission line can be selected according to the test frequency, the actual processing and assembly difficulty and the cost, the characteristic impedance of the first transmission line and the second transmission line is 50 ohms, which can be matched with the impedance of the general radio frequency connector and the port of the test instrument, so as to avoid the decrease of the accuracy of the extraction of the radio frequency connector insertion loss due to the significant reflection of the signal; the type of the transmission line can be selected from the types of transmission lines which are convenient to process on the plane printed circuit board, such as microstrip line, coplanar waveguide, grounded coplanar waveguide, etc. For example, the first transmission line can be two segments of unit length transmission line, and the second transmission line can be three segments of unit length transmission line.

[0061] For 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 electrically connecting the two ports of the vector network analyzer with the two radio frequency connectors of the first test circuit board one by one; similarly, the second scattering parameter matrix can be obtained by electrically connecting the two ports of the vector network analyzer with the two radio frequency connectors of the second test circuit board one by one.

[0062] Taking the test frequency range of 0.6-3GHz and the frequency interval of 10MHz as an example, a total of 141 first scattering parameter matrices and second scattering parameter matrices at different frequency points can be measured, and then 141 first cascade parameter matrices and second cascade parameter matrices are converted. 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 taken as an example for description, and in other embodiments, the first cascade parameter matrix and the second cascade parameter matrix at other number of frequency points can also be used.

[0063] 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.

[0064] In this embodiment, the first test circuit board can be regarded as the cascade of the input radio frequency connector, two unit length transmission lines and the output radio frequency connector, so according to the properties of the cascade parameter, the first cascade parameter matrix can be expressed as ; similarly, the second cascade parameter matrix can be expressed as ; wherein, represents the third cascade parameter matrix of a unit length transmission line, represents the cascade parameter of the input radio frequency connector, represents the cascade parameter matrix of the output radio frequency connector. According to the transmission line theory, is a diagonal matrix, and the diagonal parameters are , is the propagation coefficient of the transmission line, is the length of the transmission line.

[0065] Taking the first cascade parameter matrix and the second cascade parameter matrix at the aforementioned 141 frequency points as an example, the first cascade parameter matrix and the second cascade parameter matrix are calculated to obtain the intermediate cascade parameter matrix and the second transmission line is 1 unit length, so the fourth cascade parameter matrix of the unit length transmission line and the RF connector can be obtained by the TL de-embedding calibration method. and are similar matrices, so and have the same eigenvalues, and is a diagonal matrix, so the eigenvalues of can be solved by software, and the cascade parameters of the unit length transmission line are further obtained.

[0066] In step 104, the first test circuit board is used as a non-zero length through calibration piece, the second test circuit board is used as a line calibration piece, and the fourth cascade parameter matrix of the unit length transmission line and the RF connector at multiple frequency points is obtained by the TL de-embedding calibration method.

[0067] In this embodiment, the first test circuit board is used as a non-zero length through calibration piece, the second test circuit board is used as a line calibration piece, and the TL de-embedding calibration method is applied to calculate the first cascade parameter matrix and the second cascade parameter matrix at 141 frequency points, and the fourth cascade parameter matrix of the unit length transmission line and the RF connector at the 141 frequency points can be obtained. .

[0068] Among them, taking the cascade parameter of the unit length transmission line and the output RF connector as the fourth cascade parameter matrix as an example, since the input RF connector and the output RF connector in the present application are the same, the fourth cascade parameter matrix can also be understood as the cascade parameter matrix of the unit length transmission line and the input RF connector.

[0069] In step 105, the insertion loss of a single RF connector at multiple frequency points is obtained according to the fourth cascade parameter matrix and the third cascade parameter matrix.

[0070] In this embodiment, the fourth cascade parameter matrix and the third cascade parameter matrix of the unit length transmission line can be obtained, and the fifth cascade parameter matrix of a single RF connector can be obtained. Among them, the fourth cascade parameter matrix can be rewritten as Since the output RF connector and the input RF connector in the present application are the same, the cascade parameter matrix of a single RF connector , so is obtained, wherein the third cascade parameter matrix is known, the fourth parameter matrix is known, and thus the fifth cascade parameter matrix of a single RF connector can be calculated.

[0071] Further, the fifth cascaded parameter matrix is converted into a third scattering parameter matrix of a single radio frequency connector at multiple frequency points , and 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. The logarithmic operation is , wherein is the insertion loss, is the forward transmission coefficient. In this way, the insertion loss of the radio frequency connector at 141 frequency points can be obtained, that is, the corresponding relationship between the frequency and the insertion loss is obtained, and subsequently the insertion loss corresponding to the radio frequency connector can be found from the corresponding relationship according to the working frequency.

[0072] As can be seen from the above embodiment, in the technical solution of the present application, the TL can be applied to embed the calibration method to obtain the insertion loss of the radio frequency connector, and in the process of the insertion loss test method of the radio frequency connector, the zero-length through calibration piece is not needed, thereby solving the problem that the zero-length through calibration piece is difficult to assemble and process in the prior art.

[0073] Based on the technical solution of the present application, as shown in Figures 2-4 , a radio frequency connector insertion loss test device is also provided, which 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. 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 connected to the radio frequency connector, respectively. 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 connected to the radio frequency connector, respectively. 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 of the transmission line is the same as the radio frequency connector connected to the input end of the transmission line.

[0074] The first fixing device 3 is used to fix the first test circuit board 1, for example, by fixing with screws or by snap-fitting. The second fixing device 4 is used to fix the second test circuit board 2, for example, by fixing with screws or by snap-fitting. The two ports of the first vector network analyzer 5 are connected one-to-one with the two RF connectors of the first test circuit board 1. 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 one-to-one with the two RF connectors of the second test circuit board 2. 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 to obtain the first scattering parameter matrix and the second scattering parameter matrix. The processor 7 can execute the steps of the method described in any of the foregoing embodiments.

[0075] Before obtaining the first and second scattering parameter matrices, the first vector network analyzer 5 and the second vector network analyzer 6 can be calibrated. For example, the vector network analyzer used in the test is a Keysight P5024A, and the calibration method is SOLT calibration, the purpose of which is to eliminate the influence of the RF cable at the port of the vector network analyzer on the test.

[0076] In some embodiments, such as Figure 3 and Figure 4 As shown, the first fixing device 3 and the second fixing device 4 can adopt basically the same structure, the difference being that their lengths are adapted to the length of the corresponding test circuit board. For example... Figure 3 For the first fixing device 3, Figure 4 As the second fixing device 4, since the first transmission line is shorter than the second transmission line by one unit length, 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, so as to fix the first test circuit board 1 by the first test board fixing member 32, fix the RF connector on the first test circuit board 1 by the first RF connector fixing member 33, and the first housing 31 can form support and protection for the first test circuit board 1; similarly, such as Figure 4 As shown, the second fixing device 4 includes a second housing 41, a second test board fixing member 42, and a second radio frequency connector fixing member 43.

[0077] Corresponding to the aforementioned embodiments of the insertion loss testing method, this application also provides embodiments of the insertion loss testing apparatus.

[0078] Figure 5 This is a block diagram illustrating an insertion loss testing apparatus according to an exemplary embodiment. (Refer to...) Figure 5The insertion loss test device comprises 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:

[0079] The 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, the first test circuit board comprising a radio frequency connector and a first transmission line, the output end and the input end of the first transmission line being connected to the radio frequency connector respectively;

[0080] The 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, the second test circuit board comprising a radio frequency connector and a second transmission line, the output end and the input end of the second transmission line being connected to the radio frequency connector respectively, the difference between the unit lengths of the first transmission line and the second transmission line being 1;

[0081] The 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 the frequency point;

[0082] The second acquisition module 54 acquires a fourth cascade parameter matrix of a unit length transmission line and a radio frequency connector in cascade at multiple frequency points by using the first test circuit board as a non-zero length through calibration device, the second test circuit board as a line calibration device and a TL de-embedding calibration method;

[0083] 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.

[0084] As shown in Figure 6 , Figure 6 is a block diagram of another insertion loss test device according to an exemplary embodiment, which is based on the aforementioned Figure 5 embodiment shown in the foregoing, the first acquisition module 53 can comprise a first calculation unit 531 and a second calculation unit 532, wherein:

[0085] 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.

[0086] The second calculation unit 532 obtains the third cascade parameter matrix based on the eigenvalue of the intermediate parameter matrix, the intermediate cascade parameter matrix and the third cascade parameter matrix being similar matrices and the third cascade parameter matrix being a diagonal matrix.

[0087] As shown in Figure 7 , Figure 7is a block diagram of another insertion loss test device according to an exemplary embodiment, which is based on the aforementioned Figure 5 The calculation module 55 can include a third calculation unit 551, a conversion unit 552 and a fourth calculation unit 553 according to the embodiment shown in the foregoing

[0088] The third calculation unit 551 obtains 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.

[0089] The conversion unit 552 converts the fifth cascade parameter matrix into a third scattering parameter matrix of the single radio frequency connector at the multiple frequency points.

[0090] The fourth calculation unit 553 logarithmically operates 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.

[0091] It should be noted that the above Figure 7 The structures of the third calculation unit 551, the conversion unit 552 and the fourth calculation unit 553 in the device embodiment shown in the foregoing Figure 6 The device embodiment is not limited by the present application.

[0092] The fourth cascade parameter matrix , is obtained according to the fourth cascade parameter matrix , is the cascade parameter of a section of unit length transmission line.

[0093] As to the device in the foregoing 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 described in detail here.

[0094] For the device embodiment, since it basically corresponds to the method embodiment, the related parts are described in the part of the method embodiment. The device embodiment described above is only schematic, and the units shown as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e. they can be located in one place, or distributed on multiple network units. According to actual needs, some or all of the modules can be selected to achieve the purpose of the present application. Those skilled in the art can understand and implement it without creative labor.

[0095] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the specification and examples be considered as exemplary only, with the true scope and spirit of the application being indicated by the following claims.

[0096] It is to be understood that the application is not limited to the precise construction herein disclosed and shown in the drawings, and that various changes can be made to the application without departing from the scope thereof. The scope of the application is limited only by the claims appended hereto.

Claims

1. A method for testing the insertion loss of an RF connector, characterized in that, include: The first scattering parameter matrix of the first test circuit board at multiple frequency points is converted into a first cascaded parameter matrix. The first test circuit board includes an RF connector and a first transmission line. The output end and the input end of the first transmission line are respectively connected to the RF connector. The second scattering parameter matrix at multiple frequency points of the second test circuit board is converted into a second cascaded parameter matrix. The second test circuit board includes an RF connector and a second transmission line. The output and input ends of the second transmission line are respectively connected to the RF connector. The difference in unit length between the first transmission line and the second transmission line is 1. Based on the first and second concatenated parameter matrices at each frequency point, obtain the third concatenated 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 component and the second test circuit board as a line calibration component, the fourth cascade parameter matrix of a unit length transmission line and RF connector cascaded at multiple frequency points is obtained by using the TL de-embedding calibration method. Based on the fourth cascaded parameter matrix and the third cascaded parameter matrix, the insertion loss of a single RF connector at multiple frequency points is obtained; The step of obtaining the insertion loss of a single RF connector at multiple frequency points based on the fourth concatenated parameter matrix and the third concatenated parameter matrix includes: Based on the fourth cascaded parameter matrix and the third cascaded parameter matrix, the fifth cascaded parameter matrix of a single RF connector at multiple frequency points is obtained; The fifth concatenated parameter matrix is ​​converted into a third scattering parameter matrix of a single RF connector at multiple frequency points; The insertion loss of the RF connector at any frequency point is obtained by performing a logarithmic operation on the magnitude of the forward transmission coefficient in the third scattering parameter matrix.

2. The test method according to claim 1, characterized in that, The step of obtaining the third concatenated parameter matrix of a unit length transmission line at each frequency point based on the first and second concatenated parameter matrices at each frequency point includes: The intermediate concatenated parameter matrix is ​​obtained based on the first and second concatenated parameter matrices at multiple frequency points; The intermediate concatenated parameter matrix and the third concatenated parameter matrix are similar matrices, and the third concatenated parameter matrix is ​​a diagonal matrix. The third concatenated parameter matrix is ​​obtained based on the eigenvalues ​​of the intermediate concatenated parameter matrix.

3. The test method according to claim 1, characterized in that, The step of obtaining the fifth cascaded parameter matrix for a single RF connector at multiple frequency points based on the fourth cascaded parameter matrix and the third cascaded parameter matrix includes: Based on the fourth cascade parameter matrix , ,get ,in, This is the fifth cascaded parameter matrix for a single RF connector. This is the third cascade parameter matrix for a unit length transmission line. For the cascading parameters of the input RF connectors, This is the cascade parameter matrix for the output RF connector.

4. A system for testing the insertion loss of an RF connector, characterized in that, include: A first test circuit board, the first test circuit board includes an RF connector and a first transmission line, the output end and the input end of the first transmission line are respectively connected to the RF connector; The second test circuit board includes an RF connector and a second transmission line. The output and input ends of the second transmission line are respectively connected to the RF connector. The difference in unit length between the first transmission line and the second transmission line is 1. A first fixing device is used to fix the first test circuit board; The second fixing device is used to fix the second test circuit board; A first vector network analyzer, wherein the two ports of the first vector network analyzer are connected one-to-one with the two RF connectors of the first test circuit board, and the first vector network analyzer is used to obtain the first scattering parameter matrix; The second vector network analyzer has two ports that are connected one-to-one with the two RF connectors of the second test circuit board. The second vector network analyzer is used to obtain the second scattering parameter matrix. A processor for implementing the steps of any one of the methods described in claims 1-3.

5. A testing device for insertion loss of an RF connector, characterized in that, include: The first conversion module converts the first scattering parameter matrix of the first test circuit board at multiple frequency points into a first cascaded parameter matrix. The first test circuit board includes an RF connector and a first transmission line. The output end and input end of the first transmission line are respectively connected to the RF connector. The first conversion module converts the second scattering parameter matrix of the second test circuit board at multiple frequency points into a second cascaded parameter matrix. The second test circuit board includes an RF connector and a second transmission line. The output and input ends of the second transmission line are respectively connected to the RF connector. The difference in unit length between the first transmission line and the second transmission line is 1. The first acquisition module acquires the third concatenated parameter matrix of a unit length transmission line at each frequency point based on the first concatenated parameter matrix and the second concatenated parameter matrix at each frequency point. The second acquisition module 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. It uses the TL de-embedding calibration method to acquire the fourth cascade parameter matrix of a unit length transmission line and RF connector cascaded at multiple frequency points. The calculation module obtains the insertion loss of a single RF connector at multiple frequency points based on the fourth cascaded parameter matrix and the third cascaded parameter matrix. The computing module includes: The third calculation unit obtains the fifth cascaded parameter matrix of a single RF connector at multiple frequency points based on the fourth cascaded parameter matrix and the third cascaded parameter matrix. The conversion unit converts the fifth cascaded parameter matrix into a third scattering parameter matrix of a single RF 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 RF connector at any frequency point.

6. The insertion loss testing device according to claim 5, characterized in that, The first acquisition module includes: The first calculation unit obtains the intermediate cascade parameter matrix based on the first and second cascade parameter matrices at multiple frequency points; The second calculation unit obtains the third concatenated parameter matrix based on the eigenvalues ​​of the intermediate concatenated parameter matrix, since the intermediate concatenated parameter matrix and the third concatenated parameter matrix are similar matrices and the third concatenated parameter matrix is ​​a diagonal matrix.

7. The insertion loss testing device according to claim 5, characterized in that, The third calculation unit includes: based on the fourth concatenation parameter matrix. , ,get ,in, This is the fifth cascaded parameter matrix for a single RF connector. This is the third cascade parameter matrix for a unit length transmission line. For the cascading parameters of the input RF connectors, This is the cascade parameter matrix for the output RF connector.

8. A computer-readable storage medium storing computer instructions thereon, characterized in that, When executed by the processor, this instruction implements the steps of the method as described in any one of claims 1-3.

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