Radio frequency filter switching device, system and method

Abstract

The present invention provides a radio frequency filter switching device, system and method, the device comprising: a first end of a first module is connected to a sine wave signal source, a second end of the first module is connected to a first end of a first power divider; a first end of a second module is connected to a second end of the first power divider, a second end of the second module is connected to a modulated signal source; a first end of the second power divider is connected to a first end of a third module, a second end of the second power divider is connected to a spectrum analyzer, a third end of the second power divider is connected to a second end of the third module; a first end of a third power divider is connected to a first end of a third module, a second end of the third power divider is connected to a third end of the first power divider, a third end of the third power divider is connected to a second end of the third module; a third end of the third module is connected to a base station simulator, and a fourth end of the third module is connected to a device under test. The present invention has high testing efficiency and accuracy.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a radio frequency filtering switching device, system and method. Background Art

[0002] In the existing 5G FR1 mobile terminal RF test, the RF link is manually built, and the tester needs to select the required test instruments, power dividers, attenuators, filters and other passive devices according to different test cases and test frequency bands, manually build the test link, and perform link calibration. Since the complete RF test includes many different test cases and test frequency bands, the entire test process is very cumbersome for the selection, construction and calibration of test equipment and links, and the accuracy is difficult to guarantee, which affects the test accuracy. Summary of the invention

[0003] An embodiment of the present invention provides a radio frequency filter switching device for improving the accuracy and test efficiency of radio frequency testing of a 5G FR1 mobile terminal. The device includes:

[0004] A first module, a second module, a third module, a first power divider, a second power divider, and a third power divider, wherein:

[0005] A first end of the first module is connected to a sine wave signal source, and a second end of the first module is connected to a first end of the first power divider;

[0006] The first end of the second module is connected to the second end of the first power divider, and the second end of the second module is connected to the modulation signal source;

[0007] The first end of the second power divider is connected to the first end of the third module, the second end of the second power divider is connected to the spectrum analyzer, and the third end of the second power divider is connected to the second end of the third module;

[0008] The first end of the third power divider is connected to the first end of the third module, the second end of the third power divider is connected to the third end of the first power divider, and the third end of the third power divider is connected to the second end of the third module;

[0009] The third end of the third module is connected to the base station simulator, and the fourth end of the third module is connected to the device under test 11;

[0010] The first end and the second end of the third module are branch switches.

[0011] An embodiment of the present invention provides a radio frequency filter switching method to improve the accuracy and test efficiency of radio frequency testing of a 5G FR1 mobile terminal. The method includes:

[0012] Switch the branch switch 13 and the branch switch 2 to the NC branch, connect the third end of the third module to the base station simulator, and connect the fourth end of the third module to the device under test to achieve a maximum output power test of the device under test;

[0013] Switch the branch switch and the branch switch to the NO branch, switch the first end of the third module to the first end of the second power divider, switch the second end of the third module to the third end of the second power divider, connect the third end of the third module to the base station simulator, and connect the fourth end of the third module to the device under test, so as to achieve the maximum output power test spectrum emission template or adjacent channel leakage ratio test of the device under test;

[0014] Switch the branch switch and the branch switch to the NO branch, connect the filter module between the spectrum analyzer and the second end of the second power divider, switch the first end of the third module to the first end of the second power divider, switch the second end of the third module to the third end of the second power divider, connect the third end of the third module to the base station simulator, and connect the fourth end of the third module to the device under test to implement the spurious test of the device under test;

[0015] Switch the branch switch and the branch switch to the NO branch, switch the first end of the third module to the first end of the third power divider, switch the second end of the third module to the third end of the third power divider, connect the third end of the third module to the base station simulator, and connect the fourth end of the third module to the device under test, so as to implement receiver testing of the device under test;

[0016] Connect the RF port of mobile terminal A to the LTE / 5G port at the fourth end of the third module, and connect the RF port of mobile terminal B to the LTE port at the fourth end of the third module; connect the LTE RF port of the base station simulator to the LTE base station simulator port at the third end of the third module, and connect the 5G RF port of the base station simulator to the LTE / 5G base station simulator port at the third end of the third module; when starting to establish a connection, switch the three-branch switch to the third branch switch, and switch the three-branch switch to the third branch switch; after establishing the LTE connection, switch the three-branch switch to the first branch switch or the second branch switch, and switch the three-branch switch to the first branch switch or the second branch switch; to deal with the problem of port multiplexing of the device under test.

[0017] An embodiment of the present invention further proposes a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the above-mentioned radio frequency filtering switching method when executing the computer program.

[0018] An embodiment of the present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for executing the above-mentioned radio frequency filtering switching method.

[0019] In an embodiment of the present invention, a modulation signal source, a sinusoidal wave signal source, and a spectrum analyzer can be selected through the first module, the second module, the third module, the first power divider, the second power divider, and the third power divider, so as to complete the construction and calibration of the RF link, and can quickly and accurately establish a multi-port to multi-port RF link, thereby improving the accuracy and test efficiency of the RF test of 5G FR1 mobile terminals. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0021] Figure 1 A circuit structure diagram of a radio frequency filter switching device according to an embodiment of the present invention;

[0022] Figure 2 Another circuit structure diagram of the radio frequency filter switching device in an embodiment of the present invention;

[0023] Figure 3 is a circuit structure diagram of a filter module in an embodiment of the present invention;

[0024] Figure 4 Flow chart of a radio frequency filter switching method according to an embodiment of the present invention;

[0025] Figure 5 Schematic diagram of a computer device in an embodiment of the present invention. DETAILED DESCRIPTION

[0026] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0027] In the description of this specification, the terms "include", "including", "have", "contain", etc. are all open terms, which mean including but not limited to. The descriptions with reference to the terms "one embodiment", "a specific embodiment", "some embodiments", "for example", etc. mean that the specific features, structures or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. The order of steps involved in each embodiment is used to schematically illustrate the implementation of the present application, and the order of steps is not limited and can be appropriately adjusted as needed.

[0028] Figure 1 FIG. 1 is a circuit diagram of a radio frequency filter switching device according to an embodiment of the present invention. Figure 1 As shown, including:

[0029] A first module 1, a second module 2, a third module 3, a first power divider 7, a second power divider 8, and a third power divider 9, wherein:

[0030] The first end 14 of the first module 1 is connected to the sine wave signal source 4, and the second end 15 of the first module 1 is connected to the first end of the first power divider 7;

[0031] The first end 16 of the second module 2 is connected to the second end of the first power divider 7, and the second end 17 of the second module 2 is connected to the modulation signal source 5;

[0032] The first end of the second power divider 8 is connected to the first end 20 of the third module 3, the second end of the second power divider 8 is connected to the spectrum analyzer 6, and the third end of the second power divider 8 is connected to the second end 21 of the third module 3;

[0033] The first end of the third power divider 9 is connected to the first end 20 of the third module 3, the second end of the third power divider 9 is connected to the third end of the first power divider 7, and the third end of the third power divider 9 is connected to the second end 21 of the third module 3;

[0034] The third terminal 22 of the third module 3 is connected to the base station simulator 10, and the fourth terminal 23 of the third module 3 is connected to the device under test 11;

[0035] The first end 20 and the second end 21 of the third module 3 are branch switches.

[0036] The device of the present invention is used for 5G FR1 mobile terminal radio frequency testing. In one embodiment, the third module 3 includes multiple branch switches 13 and multiple first and third branch switches 24 connected to the third end 22 of the third module 3, multiple branch switches 2 and multiple second and third branch switches 25 connected to the fourth end 23 of the third module 3, multiple NC branches, multiple NO branches and radio frequency links; the branch switch 13 and the branch switch 2 are used to connect the NC branch or the NO branch, and the NC branch is a direct connection branch between the base station simulator and the device under test; the first and third branch switches 24 and the second and third branch switches 25 are used to connect the radio frequency link.

[0037] In specific implementation, the sine wave signal source 4 generates and transmits a sine wave signal. The sine wave signal source 4 can only output signals. If the signal input to the sine wave signal source 4 is too large, the signal source will be damaged.

[0038] The modulation signal source 5 generates and transmits the modulation signal. The modulation signal source 5 can only output signals. If the signal input to the modulation signal source 5 is too large, the signal source will be damaged.

[0039] The signals of the above three power dividers can be interconnected from the upper two branches and the lower combined branch, but the signals cannot be interconnected between the upper two branches.

[0040] The spectrum analyzer 6 can receive radio frequency signals and measure and analyze the index characteristics thereof.

[0041] The base station simulator can simulate the communication between a communication base station and a device under test (such as a mobile phone), and bring the device under test into a specified state in order to test the RF performance of the device under test.

[0042] The device under test (DUT) can be a mobile device such as a mobile phone.

[0043] exist Figure 1 In the circuit structure in the figure, the spectrum analyzer, sine wave signal source and modulation signal source can be optionally connected to the device according to the needs of the test case. According to the needs of the test case, the working state of the whole device can be roughly divided into three types:

[0044] 1. The base station simulator 10 on the left is directly connected to the device under test 11 on the right through this device for testing.

[0045] 2. Based on state 1, introduce spectrum analyzer 6 for testing.

[0046] 3. Based on state 1, introduce a sine wave signal source and / or a modulation signal source for testing.

[0047] In one embodiment, the third end 22 of the third module 3 includes three groups of RF ports, each group of RF ports includes multiple RF ports, wherein the first group of RF ports is a spare port; the second group of RF ports is used to connect to the branch switch 13; the third group of RF ports is used to connect to the first three-branch switch 24, the first branch switch of the first three-branch switch 24 is used to connect the NO branch, the second branch switch of the first three-branch switch 24 is used to connect the NC branch, and the third branch switch of the first three-branch switch 24 is used to automatically switch the RF link.

[0048] In one embodiment, the first group of RF ports and the second group of RF ports of the third end 22 of the third module 3 are 5G base station simulator ports, and the third group of RF ports includes an LTE base station simulator port and an LTE / 5G base station simulator port.

[0049] In one embodiment, the fourth end 23 of the third module 3 includes three groups of RF ports, each group of RF ports includes multiple RF ports, wherein the first group of RF ports is a spare port; the second group of RF ports is used to connect branch switch 2; the third group of RF ports is used to connect the second third branch switch 25, the first branch switch of the second third branch switch 25 is used to connect the NO branch, the second branch switch of the second third branch switch 25 is used to connect the NC branch, and the third branch switch of the second third branch switch 25 is used to automatically switch the RF link.

[0050] In one embodiment, the first group of RF ports and the second group of RF ports of the fourth end 23 of the third module 3 are 5G ports, and the third group of RF ports includes an LTE port and an LTE / 5G port.

[0051] exist Figure 1 In the example given, the first group of RF ports of the third end 22 of the third module 3 includes 2, the second group of RF ports includes 4, and the third group of RF ports includes 2, so there are 8 in total. The third end 23 of the third module 3 also includes 8, and the third end 22 and the fourth end 23 are symmetrical. The NO branch can be optionally connected to a sine wave signal source, a modulation signal source or a spectrum analyzer between the base station simulator 10 and the device under test. The third branch switch of the first three-branch switch 24 and the second three-branch switch 25 is used to automatically switch the RF link. It is a dynamic matching branch, and the RF link can be automatically switched to solve the port multiplexing problem.

[0052] In one embodiment, the NC branch includes an adjustable attenuator 12; the NO branch is used to connect the first end 20 of the third module 3 or the second end 21 of the third module 3;

[0053] The radio frequency link includes multiple power dividers connected to the first three-branch switch 24, a third three-branch switch 27 connected to the power divider, an adjustable attenuator 12 connected to the second branch switch of the third three-branch switch 27, and a load 26 connected to the third branch switch of the third three-branch switch 27, wherein the other end of the adjustable attenuator 12 connected to the second branch switch of the third three-branch switch 27 is connected to the second three-branch switch 25.

[0054] The above-mentioned adjustable attenuator is programmable to achieve adjustable attenuation. The load 26 prevents signal leakage and matches the impedance.

[0055] In one embodiment, the first module 1 includes multiple filter branches, each filter branch includes a filter 19, the first end 14 of the first module 1 is a multi-branch switch, and the second end 15 of the first module 1 is a multi-branch switch, wherein the number of branches of the multi-branch switch at the first end 14 of the first module 1 and the multi-branch switch at the second end 15 are consistent with the number of filter branches of the first module 1.

[0056] In one embodiment, each filtering branch of the first module 1 further includes a first unidirectional isolator 18 , and a signal of the first unidirectional isolator 18 can be transmitted from the first end 14 of the first module 1 to the second end 15 of the first module 1 .

[0057] exist Figure 1 In the example, the multi-branch switch at the first end 14 and the second end 15 of the first module 1 has 6 branches, which are respectively connected to the six filter branches. The filter branch implements the filtering of the signal at a specific frequency and makes the signal unidirectional from the first end 14 to the second end 15, and prevents the signal from flowing back into the sine wave signal source through the link to ensure the safety of the sine wave signal source.

[0058] In one embodiment, the second module 2 includes multiple filter branches, each filter branch includes a filter 28, the first end 16 of the second module 2 is a multi-branch switch, and the second end 17 of the second module 2 is a multi-branch switch, wherein the number of branches of the multi-branch switch at the first end 16 of the second module 2 and the multi-branch switch at the second end 17 are consistent with the number of filter branches of the second module 2.

[0059] In one embodiment, each filtering branch of the second module 2 further includes a second unidirectional isolator 29 , and a signal of the second unidirectional isolator 29 can be transmitted from the second end 17 of the second module 2 to the first end 16 of the second module 2 .

[0060] exist Figure 1In the example, the multi-branch switch at the first end 16 and the second end 17 of the second module 2 has four branches, which are respectively connected to four filter branches. The filter branch implements filtering of a specific frequency of the signal and makes the signal unidirectional from the second end 17 to the second end 16, avoiding the signal from flowing back into the modulation signal source through the link to ensure the safety of the modulation signal source.

[0061] The first unidirectional isolator 18 and the second unidirectional isolator 29 allow the signal to pass only in one direction. The filter 19 and the filter 28 can filter out characteristic frequency signals, that is, even if a signal of a specific frequency can pass, signals of other frequencies cannot pass.

[0062] Figure 2 Another circuit structure diagram of the RF filter switching device in an embodiment of the present invention. In one embodiment, the device further includes a filter module 35, a first end of the filter module 35 is connected to the spectrum analyzer, and a second end is connected to the second end of the second power divider 8; the filter module 35 includes an RF signal input port 30, a first switching box 31 connected to the RF signal input port, a filter box 32 connected to the switching box, a second switching box 33 connected to the filter box, and an RF signal output port 34 connected to the second switching box;

[0063] The first switching box 31 and the second switching box 33 include switching switches;

[0064] The filter box 32 includes a plurality of radio frequency branches, each of which includes a different filter;

[0065] The radio frequency signal output port 34 is connected to the spectrum analyzer 6 .

[0066] Figure 3 FIG. 3 is a circuit structure diagram of a filter module in an embodiment of the present invention. The filter module 35 is an independent box body, which includes a radio frequency signal input port (tobox) and a radio frequency signal output port (tosa). Figure 3 In the example in , the filter module contains 32 RF branches, of which 12 are standby branches, not connected to any devices, for subsequent expansion, and the remaining 20 branches are connected to different filters. During the test, according to the needs of the specific test case, the program is used to dynamically switch different filter branches to access the RF link to achieve the signal filtering function. Table 1 gives an example of the parameters of each filter branch of the filter module.

[0067] Table 1

[0068]

[0069]

[0070]

[0071]

[0072] Four types of tests can be implemented using the above-mentioned RF filter switching device.

[0073] The first one is the maximum output power test of the mobile terminal.

[0074] The device under test is a mobile terminal. This test requires a direct connection between the base station simulator and the device under test, and the RF path is as short as possible to avoid loss and increase measurement accuracy. Therefore, the RF link is set to the NC position. A direct connection of RF signals between the base station simulator and the mobile terminal under test is achieved. Specifically, it is necessary to switch branch switch 1 13 and branch switch 2 to the NC branch, connect the third end 22 of the third module 3 to the base station simulator 10, and connect the fourth end 23 of the third module 3 to the device under test 11.

[0075] The second type is the mobile terminal spectrum emission template and adjacent channel leakage ratio test.

[0076] The device under test is a mobile terminal, which requires a base station simulator, a spectrum analyzer and a mobile terminal to be connected. Therefore, the RF link is set to the NO position. And the switch is switched to the spectrum analyzer position. A direct connection of RF signals between the base station simulator, the signal source and the mobile terminal is achieved. Specifically, it is necessary to switch branch switch 13 and branch switch 2 to the NO branch, switch the first end 20 of the third module 3 to the first end of the second power divider 8, switch the second end 21 of the third module 3 to the third end of the second power divider 8, connect the third end 22 of the third module 3 to the base station simulator 10, and connect the fourth end 23 of the third module 3 to the device under test 11.

[0077] The third type is mobile terminal spurious testing.

[0078] The device under test is a mobile terminal, which requires a base station simulator, a spectrum analyzer, a filter group and a mobile terminal to be connected. Therefore, the RF link is set to the NO position. And the filter module 35 is removed from the link. And the design of the power divider can prevent the downlink signal emitted by the base station simulator from entering the spectrum analyzer, and only the uplink signal emitted by the mobile terminal enters the spectrum analyzer, so as to achieve accurate measurement of the stray signal of the terminal under test. Specifically, it is necessary to connect the filter module 35 between the spectrum analyzer 6 and the second end of the second power divider 8, switch the first end 20 of the third module 3 to the first end of the second power divider 8, switch the second end 21 of the third module 3 to the third end of the second power divider 8, connect the third end 22 of the third module 3 to the base station simulator 10, and connect the fourth end 23 of the third module 3 to the device under test 11.

[0079] The fourth type is mobile terminal receiver testing.

[0080] The device under test is a mobile terminal, which requires a base station simulator, a sine wave signal source, a modulated signal source and a mobile terminal to be connected. Therefore, the RF link is set to the NO position. The sine wave signal source and the modulated signal source are connected through the first power divider and the third power divider. And the design of the power divider and the unidirectional isolator can prevent the downlink signal emitted by the base station simulator and the uplink signal emitted by the device under test (mobile terminal, such as a mobile phone) from entering the signal source, thereby ensuring safety together. And the signals emitted by the two signal sources will only enter the RF port of the mobile terminal, so as to achieve accurate measurement of the mobile terminal receiver. Specifically, it is necessary to switch the first end 20 of the third module 3 to the first end of the third power divider 9, and switch the second end 21 of the third module 3 to the third end of the third power divider 9.

[0081] For the above four types of tests, for some mobile terminals, there is a situation where LTE and 5G RF ports are multiplexed. For example: the mobile terminal has two RF ports A and B, and the base station simulator has two RF ports LTE and 5G. When the mobile terminal starts to establish a connection with the base station simulator, the RF port A of the mobile terminal first sends and receives LTE RF signals, and establishes an LTE communication connection with the LTE RF port of the base station simulator. The mobile terminal immediately changes to the B RF port to send and receive LTE RF signals. While the RF port B of the mobile terminal maintains an LTE communication connection with the LTE port of the base station simulator, the A RF port of the mobile terminal sends and receives 5G RF signals. The A RF port of the mobile terminal establishes a 5G communication connection with the 5G RF port of the base station simulator to complete the establishment of the communication connection. In the above situation, if the filter switching device is not used, but the connection is made manually directly. When the RF port of the mobile terminal LTE RF link is switched, the cable connection needs to be manually changed, the timeliness cannot meet the technical requirements, and the smooth establishment of the RF connection cannot be guaranteed.

[0082] The use of this device can automatically switch the RF link to solve the port multiplexing problem. Taking the above situation as an example, it specifically includes: connecting the RF port of mobile terminal A to the LTE / 5G port of the fourth end 23 of the third module 3, and connecting the RF port of mobile terminal B to the LTE port of the fourth end 23 of the third module 3; connecting the LTE RF port of the base station simulator to the LTE base station simulator port of the third end 22 of the third module 3, and connecting the 5G RF port of the base station simulator to the LTE / 5G base station simulator port of the third end 22 of the third module 3; when starting to establish a connection, switch the second three-branch switch 25 to the third branch switch, and switch the first three-branch switch 24 to the third branch switch; after establishing the LTE connection, switch the second three-branch switch 25 to the first branch switch or the second branch switch, and switch the first three-branch switch 24 to the first branch switch or the second branch switch.

[0083] When the connection is initially established, the LTE signal sent by the mobile terminal passes through the third branch switch of the second three-branch switch 25, passes through the power splitter, and passes through the third branch switch of the first three-branch switch 24 to be sent to the LTE RF port of the base station simulator. After the LTE connection is established, when the mobile terminal changes to port B to transmit the LTE RF signal, the two signals can be connected through the second three-branch switch 25 and the first branch switch or the second branch switch of the second three-branch switch 25, thereby realizing the establishment of the connection under port multiplexing.

[0084] The embodiment of the present invention also provides a radio frequency filter switching system, such as Figure 1 As shown, it includes: the aforementioned radio frequency filter switching device, a sine wave signal source 4, a modulation signal source 5, a spectrum analyzer 6 and a base station simulator 10 respectively connected to the switching device.

[0085] The embodiment of the present invention further provides a radio frequency filter switching method. Figure 4 The flowchart of the radio frequency filter switching method in an embodiment of the present invention includes:

[0086] Step 401, switch the branch switch 13 and the branch switch 2 to the NC branch, connect the third end 22 of the third module 3 to the base station simulator 10, and connect the fourth end 23 of the third module 3 to the device under test 11, so as to implement the maximum output power test of the device under test 11;

[0087] Step 402, switch the branch switch 13 and the branch switch 2 to the NO branch, switch the first end 20 of the third module 3 to the first end of the second power divider 8, switch the second end 21 of the third module 3 to the third end of the second power divider 8, connect the third end 22 of the third module 3 to the base station simulator 10, and connect the fourth end 23 of the third module 3 to the device under test 11, so as to implement the maximum output power test spectrum emission template or adjacent channel leakage ratio test of the device under test 11;

[0088] Step 403, switch the branch switch 13 and the branch switch 2 to the NO branch, connect the filter module 35 between the spectrum analyzer 6 and the second end of the second power divider 8, switch the first end 20 of the third module 3 to the first end of the second power divider 8, switch the second end 21 of the third module 3 to the third end of the second power divider 8, connect the third end 22 of the third module 3 to the base station simulator 10, and connect the fourth end 23 of the third module 3 to the device under test 11, so as to implement the spurious test of the device under test 11;

[0089] Step 404, switch the branch switch 13 and the branch switch 2 to the NO branch, switch the first end 20 of the third module 3 to the first end of the third power divider 9, switch the second end 21 of the third module 3 to the third end of the third power divider 9, connect the third end 22 of the third module 3 to the base station simulator 10, and connect the fourth end 23 of the third module 3 to the device under test 11, so as to implement receiver testing of the device under test 11;

[0090] Step 405, connect the RF port of mobile terminal A to the LTE / 5G port of the fourth end 23 of the third module 3, and connect the RF port of mobile terminal B to the LTE port of the fourth end 23 of the third module 3; connect the LTE RF port of the base station simulator to the LTE base station simulator port of the third end 22 of the third module 3, and connect the 5G RF port of the base station simulator to the LTE / 5G base station simulator port of the third end 22 of the third module 3; when starting to establish the connection, switch the second three-branch switch 25 to the third branch switch, and switch the first three-branch switch 24 to the third branch switch; after establishing the LTE connection, switch the second three-branch switch 25 to the first branch switch or the second branch switch, and switch the first three-branch switch 24 to the first branch switch or the second branch switch; to deal with the port multiplexing problem of the device under test 11.

[0091] The RF filter switching device, system and method provided in the embodiments of the present invention have the following beneficial effects:

[0092] The modulation signal source, the sine wave signal source and the spectrum analyzer can be selected through the first module 1, the second module 2, the third module 3, the first power divider 7, the second power divider 8 and the third power divider to complete the construction and calibration of the RF link. The multi-port to multi-port RF link can be established quickly and accurately, thereby improving the accuracy and test efficiency of the RF test of the 5G FR1 mobile terminal.

[0093] The test types that can be completed include: maximum output power test, spectrum emission mask or adjacent channel leakage ratio test, spurious test, receiver test and port multiplexing test. There are many test types and it supports upgrade and expansion.

[0094] An embodiment of the present application also provides a computer device, Figure 5 Schematic diagram of a computer device in an embodiment of the present invention. The computer device can implement all steps in the RF filter switching method in the above embodiment. The computer device specifically includes the following contents:

[0095] Processor (processor) 501, memory (memory) 502, communication interface (CommunicationsInterface) 503 and communication bus 504;

[0096] The processor 501, the memory 502, and the communication interface 503 communicate with each other through the communication bus 504; the communication interface 503 is used to realize information transmission between the server-side device, the detection device, the user-side device and other related devices;

[0097] The processor 501 is used to call the computer program in the memory 502, and when the processor executes the computer program, all the steps in the radio frequency filtering switching method in the above embodiment are implemented.

[0098] An embodiment of the present application also provides a computer-readable storage medium, which can implement all the steps in the RF filtering switching method in the above embodiment. The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, it implements all the steps of the RF filtering switching method in the above embodiment.

[0099] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0100] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0101] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0102] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0103] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A radio frequency filter switching device, characterized in that: include: A first module (1), a second module (2), a third module (3), a first power divider (7), a second power divider (8), and a third power divider (9), wherein: The first end (14) of the first module (1) is connected to the sine wave signal source (4), and the second end (15) of the first module (1) is connected to the first end of the first power divider (7); The first end (16) of the second module (2) is connected to the second end of the first power divider (7), and the second end (17) of the second module (2) is connected to the modulation signal source (5); The first end of the second power divider (8) is connected to the first end (20) of the third module (3), the second end of the second power divider (8) is connected to the spectrum analyzer (6), and the third end of the second power divider (8) is connected to the second end (21) of the third module (3); The first end of the third power divider (9) is connected to the first end (20) of the third module (3), the second end of the third power divider (9) is connected to the third end of the first power divider (7), and the third end of the third power divider (9) is connected to the second end (21) of the third module (3); The third end (22) of the third module (3) is connected to the base station simulator (10), and the fourth end (23) of the third module (3) is connected to the device under test (11); The first end (20) and the second end (21) of the third module (3) are branch switches; The third module (3) comprises a plurality of branch switches one (13) and a plurality of first three branch switches (24) connected to the third end (22) of the third module (3), a plurality of branch switches two and a plurality of second three branch switches (25) connected to the fourth end (23) of the third module (3), a plurality of NC branches, a plurality of NO branches and a radio frequency link; the branch switch one (13) and the branch switch two are used to connect the NC branch or the NO branch, the NC branch being a direct connection branch between the base station simulator and the device under test; the first three branch switches (24) and the second three branch switches (25) are used to connect the radio frequency link; The first module (1) comprises a plurality of filter branches, each filter branch comprises a filter (19), the first end (14) of the first module (1) is a multi-branch switch, the second end (15) of the first module (1) is a multi-branch switch, wherein the number of branches of the multi-branch switch at the first end (14) of the first module (1) and the number of branches of the multi-branch switch at the second end (15) of the first module (1) are consistent with the number of filter branches of the first module (1); The second module (2) comprises a plurality of filter branches, each filter branch comprises a filter (28), the first end (16) of the second module (2) is a multi-branch switch, and the second end (17) of the second module (2) is a multi-branch switch, wherein the number of branches of the multi-branch switch at the first end (16) of the second module (2) and the number of branches of the multi-branch switch at the second end (17) are consistent with the number of filter branches of the second module (2).

2. The radio frequency filter switching device according to claim 1, characterized in that: The third end (22) of the third module (3) includes three groups of radio frequency ports, each group of radio frequency ports includes a plurality of radio frequency ports, wherein the first group of radio frequency ports is a standby port; the second group of radio frequency ports is used to connect to branch switch one (13); the third group of radio frequency ports is used to connect to the first three branch switches (24), the first branch switch of the first three branch switches (24) is used to connect to the NC branch, the second branch switch of the first three branch switches (24) is used to connect to the NO branch, and the third branch switch of the first three branch switches (24) is used to automatically switch the radio frequency link.

3. The radio frequency filter switching device according to claim 2, characterized in that: The first group of RF ports and the second group of RF ports of the third end (22) of the third module (3) are 5G base station simulator ports, and the third group of RF ports includes an LTE base station simulator port and an LTE / 5G base station simulator port.

4. The radio frequency filter switching device according to claim 1, characterized in that: The fourth end (23) of the third module (3) includes three groups of radio frequency ports, each group of radio frequency ports includes a plurality of radio frequency ports, wherein the first group of radio frequency ports is a standby port; the second group of radio frequency ports is used to connect to branch switch 2; the third group of radio frequency ports is used to connect to a second third branch switch (25), the first branch switch of the second third branch switch (25) is used to connect to an NC branch, the second branch switch of the second third branch switch (25) is used to connect to an NO branch, and the third branch switch of the second third branch switch (25) is used to automatically switch radio frequency links.

5. The radio frequency filter switching device according to claim 4, characterized in that: The first group of radio frequency ports and the second group of radio frequency ports of the fourth end (23) of the third module (3) are 5G ports, and the third group of radio frequency ports includes an LTE port and an LTE / 5G port.

6. The radio frequency filter switching device according to claim 1, characterized in that: The NC branch includes an adjustable attenuator (12); the NO branch is used to connect to the first end (20) of the third module (3) or the second end (21) of the third module (3); The radio frequency link comprises a plurality of power dividers connected to the first three-branch switch (24), a third three-branch switch (27) connected to the power divider, an adjustable attenuator (12) connected to the second branch switch of the third three-branch switch (27), and a load (26) connected to the third branch switch of the third three-branch switch (27), wherein the other end of the adjustable attenuator (12) connected to the second branch switch of the third three-branch switch (27) is connected to the second three-branch switch (25).

7. The radio frequency filter switching device according to claim 1, characterized in that: Each filtering branch of the first module (1) further comprises a first unidirectional isolator (18), the signal of the first unidirectional isolator (18) being capable of being transmitted from the first end (14) of the first module (1) to the second end (15) of the first module (1).

8. The radio frequency filter switching device according to claim 7, characterized in that: Each filtering branch of the second module (2) further comprises a second unidirectional isolator (29), and a signal of the second unidirectional isolator (29) can be transmitted from the second end (17) of the second module (2) to the first end (16) of the second module (2).

9. The radio frequency filter switching device according to claim 1, characterized in that: It also includes a filtering module (35), wherein a first end of the filtering module (35) is connected to the spectrum analyzer, and a second end of the filtering module (35) is connected to the second end of the second power divider (8); The filtering module (35) comprises a radio frequency signal input port (30), a first switching box (31) connected to the radio frequency signal input port, a filter box (32) connected to the switching box, a second switching box (33) connected to the filter box, and a radio frequency signal output port (34) connected to the second switching box; The first switching box (31) and the second switching box (33) include switching switches; The filter box (32) includes a plurality of radio frequency branches, each radio frequency branch includes a different filter; The radio frequency signal output port (34) is connected to a spectrum analyzer (6).

10. A radio frequency filter switching system, characterized in that: The radio frequency filtering switching device according to any one of claims 1 to 9, and a sinusoidal wave signal source (4), a modulated signal source (5), a spectrum analyzer (6) and a base station simulator (10) respectively connected to the switching device.

11. A radio frequency filter switching method, characterized in that: The radio frequency filter switching system according to claim 10 comprises: Switching branch switch 1 (13) and branch switch 2 to the NC branch, connecting the third end (22) of the third module (3) to the base station simulator (10), and connecting the fourth end (23) of the third module (3) to the device under test (11), so as to implement a maximum output power test of the device under test (11); The branch switch 1 (13) and the branch switch 2 are switched to the NO branch, the first end (20) of the third module (3) is switched to the first end of the second power divider (8), the second end (21) of the third module (3) is switched to the third end of the second power divider (8), the third end (22) of the third module (3) is connected to the base station simulator (10), and the fourth end (23) of the third module (3) is connected to the device under test (11), so as to implement a spectrum emission template or adjacent channel leakage ratio test of the device under test (11); The branch switch 1 (13) and the branch switch 2 are switched to the NO branch, a filter module (35) is connected between the spectrum analyzer (6) and the second end of the second power divider (8), the first end (20) of the third module (3) is switched to the first end of the second power divider (8), the second end (21) of the third module (3) is switched to the third end of the second power divider (8), the third end (22) of the third module (3) is connected to the base station simulator (10), and the fourth end (23) of the third module (3) is connected to the device under test (11), so as to implement a spurious test of the device under test (11); The branch switch 1 (13) and the branch switch 2 are switched to the NO branch, the first end (20) of the third module (3) is switched to the first end of the third power divider (9), the second end (21) of the third module (3) is switched to the third end of the third power divider (9), the third end (22) of the third module (3) is connected to the base station simulator (10), and the fourth end (23) of the third module (3) is connected to the device under test (11), so as to implement a receiver test of the device under test (11); The radio frequency port of the mobile terminal A is connected to the LTE / 5G port of the fourth end (23) of the third module (3), and the radio frequency port of the mobile terminal B is connected to the LTE port of the fourth end (23) of the third module (3); the LTE radio frequency port of the base station simulator is connected to the LTE base station simulator port of the third end (22) of the third module (3), and the 5G radio frequency port of the base station simulator is connected to the LTE / 5G base station simulator port of the third end (22) of the third module (3); when starting to establish a connection, the second three-branch switch (25) is switched to the third branch switch, and the first three-branch switch (24) is switched to the third branch switch; after the LTE connection is established, the second three-branch switch (25) is switched to the first branch switch or the second branch switch, and the first three-branch switch (24) is switched to the first branch switch or the second branch switch, so as to solve the problem of port multiplexing of the device under test (11).

12. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the method of claim 11 is implemented.

13. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program for executing the method of claim 11.

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