Coupler directionality testing system, method, and storage medium

Abstract

The application provides a coupler directivity test system, method and storage medium, which is used for obtaining the directivity of a coupler to be tested, and comprises the following: a vector signal generator, which is connected with an input port of the coupler to be tested and is used for providing a radio frequency input signal for the coupler to be tested; an external cavity coupler, an input end of which is connected with an antenna output port of the coupler to be tested; a tuner, which is connected with a straight-through output port of the external cavity coupler and is used for adjusting a mismatch standing wave ratio; a first power detection unit, which is connected with a coupling output port of the external cavity coupler and is used for detecting the output power of the external cavity coupler; and a second power detection unit, which is connected with a coupling output port of the coupler to be tested and is used for detecting the output power of the coupler to be tested. The application is beneficial to judging the directivity performance of the coupler and provides a fast and feasible scheme for performance test of an integrated power amplifier coupler.

Description

Technical Field

[0001] This invention relates to the field of radio frequency circuit technology, and in particular to a test system, method and storage medium for coupler directionality. Background Technology

[0002] With the continuous development of mobile communication technology, especially the widespread adoption of 5G communication, higher requirements have been placed on the communication quality of communication systems. Among these requirements, the accuracy of the transmission power in a mobile phone system determines the level of communication quality.

[0003] Generally, mobile phone power amplifiers use internally integrated couplers to transmit power to the phone's system chip. The magnitude of the coupled power is used to control the amplifier's output power in a closed loop. Therefore, the directivity of the coupler plays a decisive role in the accuracy of the coupled power. However, testing and evaluating the directivity of the coupler in a mobile phone power amplifier is a relatively difficult problem.

[0004] There are two solutions for integrating a coupler into a mobile phone power amplifier, such as... Figure 1 (a) and Figure 1 The two commonly used integrated coupler mobile phone power amplifier (PA) structures shown in (b) are as follows: Figure 1 The mobile PA shown in (a) can be switched to transmit via a switch between the TRX port and the ANT port, combining the TRX port, ANT port, and CPL port into a three-port network. The directivity of the coupler is calculated by differentially measuring the S-parameters of the coupling end and the isolation section using a network divider test. Figure 1 The mobile phone PA shown in (b) cannot be used because the coupler is only on the power amplifier's transmission path, and there is only one transmission path for the PA. Figure 1 The test method for the architecture shown in (a) is used to calculate and evaluate the directionality of the coupler. Summary of the Invention

[0005] This invention provides a coupler directivity testing system, method, and storage medium, aiming to solve the technical problem of difficulty in evaluating the directivity of couplers in existing mobile phone integrated power amplifiers.

[0006] To address the aforementioned technical problems, in a first aspect, the present invention provides a coupler directivity testing system, the testing system being used to acquire the directivity of the coupler under test, the testing system comprising:

[0007] A vector signal generator is connected to the input port of the coupler under test, and the vector signal generator is used to provide an RF input signal to the coupler under test;

[0008] An external cavity coupler, wherein the input terminal of the external cavity coupler is connected to the antenna output port of the coupler under test;

[0009] a tuner connected with the through output port of the external cavity coupler, the tuner being used for adjusting the mismatch standing wave ratio;

[0010] a first power detection unit connected with the coupling output port of the external cavity coupler, the first power detection unit being used for detecting the output power of the external cavity coupler;

[0011] a second power detection unit connected with the coupling output port of the to-be-tested coupler, the second power detection unit being used for detecting the output power of the to-be-tested coupler.

[0012] Further, the first power detection unit and / or the second power detection unit is a power meter or a spectrum analyzer.

[0013] In a second aspect, the present application further provides a coupler directivity testing method, which is realized based on the coupler directivity testing system as described above, and comprises the following steps:

[0014] S101, initializing the RF path insertion loss of the antenna output port of the to-be-tested coupler to the first power detection unit, and the RF path insertion loss of the coupling output port of the to-be-tested coupler to the second power detection unit;

[0015] S102, adjusting the standing wave ratio of the tuner to 1:1, and obtaining the difference between the power values respectively detected by the first power detection unit and the second power detection unit at this standing wave ratio, taking the difference as a standard coupling coefficient value;

[0016] S103, increasing the standing wave ratio of the tuner to a preset standing wave ratio;

[0017] S104, periodically adjusting the phase of the tuner at the preset standing wave ratio, and obtaining the difference between the power values respectively detected by the first power detection unit and the second power detection unit at this phase, to obtain a change coupling coefficient value;

[0018] S105, repeating step S104 to obtain a plurality of change coupling coefficient values;

[0019] S106, subtracting the plurality of coupling coefficient values from the standard coupling coefficient value respectively to obtain a plurality of fluctuation values, and outputting the plurality of fluctuation values as the directivity testing result of the to-be-tested coupler.

[0020] Further, in step S103, the preset standing wave ratio is 3:1 or 5:1.

[0021] Further, the periodically adjusting the phase of the tuner in step S104 is specifically adjusting the phase of the tuner by 15 degrees.

[0022] Further, in step S105, step S104 is repeatedly executed until the phase of the tuner is the same as the original phase of the tuner.

[0023] In a third aspect, the present application also provides a computer device, comprising a memory, a processor, and a coupler directionality detection program stored in the memory and executable on the processor, and the processor implements the steps in the coupler directionality testing method according to any one of the above embodiments when executing the coupler directionality detection program.

[0024] In a fourth aspect, the present application also provides a storage medium, and the storage medium stores a coupler directionality detection program, and the coupler directionality detection program implements the steps in the coupler directionality testing method according to any one of the above embodiments when executed by a processor.

[0025] The present application has the advantages that the coupler directionality testing system and method for the integrated power amplifier in a mobile phone are provided, the power of the specific output port of the power amplifier chip is detected through an external circuit, the control is realized by adjusting the standing wave ratio and the signal phase of the tuner, the variation of the coupler coupling coefficient can be quickly obtained, the directionality performance of the coupler can be judged, and a fast and feasible scheme is provided for the performance test of the integrated power amplifier coupler. BRIEF DESCRIPTION OF DRAWINGS

[0026] The above and other aspects of the present application will become more apparent and more readily appreciated by referring to the following detailed description in conjunction with the accompanying drawings. In the following detailed description, the present application will be described in conjunction with the accompanying drawings.

[0027] Figure 1 is a structural schematic diagram of an existing mobile phone power amplifier integrated coupler;

[0028] Figure 2 is a structural schematic diagram of the coupler directionality testing system provided by the embodiment of the present application;

[0029] Figure 3 is a step flowchart of the coupler directionality testing method provided by the embodiment of the present application;

[0030] Figure 4 is a structural schematic diagram of the computer device provided by the embodiment of the present application. DETAILED DESCRIPTION

[0031] In order to make the objectives, technical solutions and advantages of the present application clearer, further detailed description will be made to the present application in combination with the accompanying drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application, and are not used to limit the present application.

[0032] Embodiment one

[0033] Please refer to Figure 2 , Figure 2 is a structural schematic diagram of a test system for the directivity of a coupler provided by the embodiment of the present application. The test system 200 is used to obtain the directivity of a coupler to be tested 201. In the implementation process, the coupler to be tested 201 can also be integrated in a chip to be tested of a mobile phone power amplifier, i.e., its structure does not have independence. Specifically, the test system 200 comprises:

[0034] a vector signal generator 203 connected with an input port of the coupler to be tested 201. The vector signal generator 203 is used to provide a radio frequency input signal for the coupler to be tested 201;

[0035] an external cavity coupler 204. An input end of the external cavity coupler 204 is connected with an antenna output port (ANT) of the coupler to be tested 201;

[0036] a tuner 205 connected with a straight-through output port of the external cavity coupler 204. The tuner 205 is used to adjust the mismatch standing wave ratio;

[0037] a first power detection unit 206 connected with a coupled output port of the external cavity coupler 204. The first power detection unit 206 is used to detect the output power of the external cavity coupler 204;

[0038] a second power detection unit 207 connected with a coupled output port (CPL) of the coupler to be tested 201. The second power detection unit 207 is used to detect the output power of the coupler to be tested 201.

[0039] In addition, in order to realize the test function, the test system 200 further comprises a power supply 202 connected with a first input port of the coupler to be tested 201. The power supply 202 is used to provide working voltage and working current for the coupler to be tested 201.

[0040] The first power detection unit 206 and / or the second power detection unit 207 is a power meter or a spectrum analyzer.

[0041] Through the test system 200 as described above, the chip structure containing the to-be-tested coupler 201 can be directly tested without being independently disassembled, thereby solving the problem of directional detection of the integrated coupler in the mobile phone power amplifier.

[0042] The application has the advantages that a test system and method for the directional detection of the coupler of the integrated power amplifier in the mobile phone are provided, the power of the specific output port of the power amplifier chip is detected through an external circuit, the control is realized by adjusting the standing wave ratio and the signal phase of the tuner, the change of the coupling coefficient of the coupler can be quickly obtained, the directional performance of the coupler can be judged, and a fast and feasible scheme is provided for the performance test of the integrated power amplifier coupler.

[0043] Embodiment two

[0044] The application also provides a test method for the directional detection of the coupler, which is based on the test system for the directional detection of the coupler as described in the above embodiments. Figure 3 , Figure 3 FIG. 1 is a schematic flowchart of the test method for the directional detection of the coupler according to the application, which comprises the following steps:

[0045] S101, the RF path insertion loss of the antenna output port of the to-be-tested coupler to the first power detection unit and the RF path insertion loss of the coupling output port of the to-be-tested coupler to the second power detection unit are initialized;

[0046] S102, the standing wave ratio of the tuner is adjusted to 1:1, and the difference between the power values detected by the first power detection unit and the second power detection unit at this standing wave ratio is obtained as a standard coupling coefficient value;

[0047] S103, the standing wave ratio of the tuner is increased to a preset standing wave ratio; the preset standing wave ratio is 3:1 or 5:1;

[0048] S104, the phase of the tuner is periodically adjusted at the preset standing wave ratio, and the difference between the power values detected by the first power detection unit and the second power detection unit at this phase is obtained as a change coupling coefficient value;

[0049] S105, the step S104 is repeated to obtain a plurality of change coupling coefficient values;

[0050] S106, a plurality of coupling coefficient values are subtracted from the standard coupling coefficient value respectively to obtain a plurality of fluctuation values, and the plurality of fluctuation values are output as the directional test result of the to-be-tested coupler.

[0051] It can be understood that the multiple fluctuation values obtained by subtracting the multiple coupling coefficient values from the standard coupling coefficient value are the coupling coefficients of the coupling device to be detected. In the implementation process, when the standing wave ratio is set to 3:1, the fluctuation value of the coupling coefficient is not greater than ±1, and it is indicated that the directivity of the coupling device to be detected is good.

[0052] Preferably, in the step S104, the phase of the tuner is periodically adjusted by 15 degrees.

[0053] In the step S105, the step S104 is repeatedly executed until the phase of the tuner is the same as the original phase.

[0054] Through the periodic phase change, the degree of change of the coupling coefficient of the coupling device to be detected at different phases can be detected, so that comprehensive directivity evaluation can be realized.

[0055] The coupling device directivity testing method is realized based on the coupling device directivity testing system as described above, and can achieve the same technical effects. Refer to the description in the above embodiments, which will not be repeated here.

[0056] Embodiment three

[0057] The embodiment of the present application also provides a computer device, please refer to Figure 4 , Figure 4 is a structural schematic diagram of the computer device provided by the embodiment of the present application, the computer device 300 comprises a memory 302, a processor 301 and a coupling device directivity detection program stored in the memory 302 and executable on the processor 301.

[0058] The processor 301 calls the coupling device directivity detection program stored in the memory 302 to execute the steps in the coupling device directivity testing method provided by the embodiment of the present application. Please refer to Figure 3 , which specifically comprises the following steps:

[0059] S101, initializing the radio frequency path insertion loss of the antenna output port of the coupling device to be tested to the first power detection unit, and the radio frequency path insertion loss of the coupling output port of the coupling device to be tested to the second power detection unit;

[0060] S102, adjusting the standing wave ratio of the tuner to 1:1, and obtaining the difference between the power values detected by the first power detection unit and the second power detection unit at this standing wave ratio, which is taken as a standard coupling coefficient value;

[0061] S103, increasing the standing wave ratio of the tuner to a preset standing wave ratio; the preset standing wave ratio is 3:1 or 5:1;

[0062] S104, periodically adjusting the phase of the tuner under the preset standing wave ratio, and obtaining the difference between the power values detected by the first power detection unit and the second power detection unit at the phase, to obtain a change coupling coefficient value;

[0063] S105, repeating step S104 to obtain a plurality of change coupling coefficient values;

[0064] S106, subtracting the plurality of coupling coefficient values from the standard coupling coefficient value to obtain a plurality of fluctuation values, and outputting the plurality of fluctuation values as the directivity test result of the to-be-tested coupler.

[0065] Preferably, in step S104, the periodic adjustment of the phase of the tuner is specifically adjusting the phase of the tuner by 15 degrees.

[0066] In step S105, step S104 is repeatedly executed until the phase of the tuner is the same as the original phase.

[0067] The computer device 300 provided by the embodiment of the present application can realize the steps in the coupler directivity test method in the above-described embodiment, and achieve the same technical effects. Refer to the description in the above-described embodiment, which will not be repeated here.

[0068] Embodiment four

[0069] The embodiment of the present application further provides a storage medium, and the storage medium stores a coupler directivity detection program. The coupler directivity detection program is executed by a processor to realize each process and step in the coupler directivity test method provided by the embodiment of the present application, and achieve the same technical effects. To avoid repetition, this will not be repeated here.

[0070] Those skilled in the art can understand that all or part of the processes in the above-described embodiment method can be completed by a coupler directivity detection program or instruction-related hardware. The program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the above-described embodiments of each method. The storage medium can be a disk, an optical disk, a read-only memory (ROM), a random access memory (RAM), or the like.

[0071] It should be noted that, in this document, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0072] Those skilled in the art can clearly understand the above-mentioned embodiment method can be realized by means of software and necessary general hardware platform, of course, also can be realized by hardware, but in many cases, the former is a better embodiment. Based on such understanding, the technical solutions of the present application can be embodied in the form of software product, and the computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), including a plurality of instructions to make a terminal (may be a mobile phone, computer, server, air conditioner, or network equipment, etc.) execute the method described in various embodiments of the present application.

[0073] The embodiments of the present application are described above in conjunction with the accompanying drawings, the disclosed is only the preferred embodiment of the present application, but the present application is not limited to the above specific embodiments, the above specific embodiments are only illustrative, but not restrictive, those skilled in the art can make many equivalent changes in form without departing from the purpose of the present application and the scope of the claims, all of which belong to the protection of the present application.

Claims

1. A system for testing the directionality of a coupler, characterized by, The test system is used for acquiring the directivity of a coupler to be tested, and comprises: a vector signal generator connected with an input port of the coupler to be tested, the vector signal generator being used for providing a radio frequency input signal for the coupler to be tested; an external cavity coupler, an input end of the external cavity coupler being connected with an antenna output port of the coupler to be tested; a tuner connected with a straight-through output port of the external cavity coupler, the tuner being used for adjusting a mismatch standing wave ratio; a first power detection unit connected with a coupling output port of the external cavity coupler, the first power detection unit being used for detecting an output power of the external cavity coupler; a second power detection unit connected with a coupling output port of the coupler to be tested, the second power detection unit being used for detecting an output power of the coupler to be tested.

2. The system for testing the directivity of a coupler of claim 1, wherein, The first power detection unit and / or the second power detection unit is a power meter or a spectrum analyzer.

3. A method of testing the directionality of a coupler, characterized by, The test method for the directivity of the coupler is implemented based on the test system for the directivity of the coupler according to any one of claims 1-2, and comprises the following steps: S101, initializing a radio frequency path insertion loss of an antenna output port of a coupler to be tested to a first power detection unit and a radio frequency path insertion loss of a coupling output port of the coupler to be tested to a second power detection unit; S102, adjusting a standing wave ratio of a tuner to 1:1, and acquiring a difference between power values detected by the first power detection unit and the second power detection unit at this time, taking the difference as a standard coupling coefficient value; S103, increasing the standing wave ratio of the tuner to a preset standing wave ratio; S104, periodically adjusting a phase of the tuner at the preset standing wave ratio, and acquiring a difference between power values detected by the first power detection unit and the second power detection unit at this time, obtaining a change coupling coefficient value; S105, repeating step S104 to obtain a plurality of change coupling coefficient values; S106, subtracting the plurality of coupling coefficient values from the standard coupling coefficient value respectively to obtain a plurality of fluctuation values, and outputting the plurality of fluctuation values as a directivity test result of the coupler to be tested.

4. The method of claim 3, wherein, In step S103, the preset standing wave ratio is 3:1 or 5:

1.

5. The method of claim 3, wherein, In step S104, the periodic adjustment of the phase of the tuner is specifically adjusting the phase of the tuner by 15 degrees.

6. The method of claim 5, wherein, In step S105, step S104 is repeatedly executed until the phase of the tuner is the same as the original phase.

7. A computer device, comprising: comprise: a memory, a processor, and a coupler directivity detection program stored in the memory and executable on the processor, and the processor implements the steps in the test method for the directivity of the coupler according to any one of claims 3-6 when executing the coupler directivity detection program.

8. A storage medium, characterized by The storage medium has stored thereon a coupler directionality detection program which, when executed by the processor, implements the steps of the coupler directionality testing method of any one of claims 3-6.

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