Radio frequency conversion system, chip, device and test method of radio frequency conversion system

Abstract

The invention discloses a radio frequency conversion system, a chip, a device and a test method of the radio frequency conversion system, and relates to the technical field of integrated circuit testing, the radio frequency conversion system comprises a radio frequency front end, a filtering module, a gain module, an input and output interface and a switch module, the output end of the radio frequency front end is connected with the input end of the filtering module, and the input end of the gain module is connected with the input end of the input and output interface. The output end of the filter module is connected with the input end of the gain module, the output end of the gain module is connected with the input end of the input and output interface, and the switch module is connected with the output end of the radio frequency front end, the output end of the filter module, the output end of the gain module and the input and output interface. By flexibly changing the signal transmission route, the test data under different combined paths can be acquired, an effective test method is provided for accurately evaluating the performance of each module, and the radio frequency chip is flexibly and efficiently tested.

Description

Technical Field

[0001] The present invention relates to the technical field of integrated circuit testing, and in particular to a radio frequency frequency conversion system, a chip, a device and a testing method for the radio frequency frequency conversion system. Background Art

[0002] With the rapid development of wireless communication technology, RF chips are widely used in mobile communications, the Internet of Things and other fields. As the core component of RF chips, the performance of the RF frequency conversion system directly affects the working quality of the entire wireless communication system. As the communication system's requirements for RF chip performance continue to increase, it is necessary to accurately evaluate the performance of various functional modules such as the RF front end, filter, and gain amplifier in order to promptly discover and solve system performance bottlenecks, thereby ensuring the reliable operation of the entire communication system.

[0003] The current RF frequency conversion system test solution usually sets up independent test ports at the input and output ends of each functional module, and obtains the test data of each module through these test ports. This solution requires that dedicated test pins be reserved for each functional module during chip design, and the performance parameters of each module are measured one by one through these pins during testing. In order to ensure the integrity of the test signal, the test port usually needs to be equipped with a dedicated buffer circuit and drive circuit, and issues such as signal isolation and anti-interference must also be considered.

[0004] This test scheme has some limitations in practical applications. First, reserving independent test ports for each functional module will significantly increase the number of chip pins, resulting in an increase in chip area and packaging costs; second, a large number of test pins will increase the complexity of circuit wiring, easily introduce additional interference and parasitic effects, and affect the accuracy of test results; in addition, due to the dispersion of test ports, the test process requires frequent switching of test connections, which reduces test efficiency. With the continuous improvement of chip integration and the increasing complexity of functions, the limitations of this test scheme have become more prominent, and it is difficult to meet the needs of fast and efficient testing of modern RF chips. Summary of the invention

[0005] The main purpose of the present invention is to propose a radio frequency frequency conversion system, a chip, a device and a test method for the radio frequency frequency conversion system, aiming to solve the technical problem of how to test the radio frequency chip efficiently and flexibly.

[0006] To achieve the above object, the present invention proposes a radio frequency frequency conversion system, which includes: a radio frequency front end, a filter module, a gain module, an input and output interface and a switch module;

[0007] The output end of the RF front end is connected to the input end of the filter module, the output end of the filter module is connected to the input end of the gain module, the output end of the gain module is connected to the input end of the input-output interface, and the switch module is connected to the output end of the RF front end, the output end of the filter module, the output end of the gain module, and the input-output interface;

[0008] The switch module is used to change the test signal transmission route between the RF front end, the filter module, the gain module and the input and output interface;

[0009] The input and output interface is used to output test data corresponding to different transmission routes, and the test data is used to calculate test performance data.

[0010] In one embodiment, the filtering module includes: a first filter and a second filter;

[0011] The gain module comprises: a first gain amplifier and a second gain amplifier;

[0012] The input and output interface includes: a first interface and a second interface;

[0013] The input end of the first filter is connected to the output end of the RF front end, the output end of the first filter is connected to the input end of the first gain amplifier, the input end of the second filter is connected to the output end of the RF front end, and the output end of the second filter is connected to the second gain amplifier;

[0014] The output end of the first gain amplifier is connected to the input end of the first interface, and the output end of the second gain amplifier is connected to the input end of the second interface.

[0015] In one embodiment, the switch module includes: a first switch unit and a second switch unit;

[0016] The first switch unit is connected to the output end of the RF front end, the output end of the first filter, the output end of the first gain amplifier, and the output end of the first interface, and the second switch unit is connected to the output end of the RF front end, the output end of the second filter, the output end of the second gain amplifier, and the output end of the second interface;

[0017] The first switch unit is used to test the RF front end, the first filter, and the first gain amplifier by changing a test signal flow route of a first branch consisting of the RF front end, the first filter, the first gain amplifier, and the first interface;

[0018] The second switch unit is used to test the RF front end, the second filter, and the second gain amplifier by changing the test signal flow route of the second branch consisting of the RF front end, the second filter, the second gain amplifier, and the second interface.

[0019] In one embodiment, the first switch unit includes: first to seventh switches;

[0020] One end of the first switch is connected to the output end of the RF front end, the other end of the first switch is connected to the seventh switch, the other end of the seventh switch is connected to the output end of the first interface, one end of the second switch is connected to the input end of the first filter, the other end of the second switch is connected to the output end of the first filter, one end of the third switch is connected to the input end of the first gain amplifier, the other end of the third switch is connected to the output end of the first gain amplifier, one end of the fourth switch is connected to the first switch and one end of the seventh switch, the other end of the fourth switch is connected to the input end of the first interface, one end of the fifth switch is connected to the output end of the first gain amplifier, the other end of the fifth switch is connected to the input end of the first interface, one end of the sixth switch is connected to the input end of the first interface, and the other end of the sixth switch is connected to the output end of the second gain amplifier;

[0021] The second switch unit includes: an eighth switch to a fourteenth switch numbered sequentially;

[0022] One end of the eighth switch is connected to the output end of the RF front end, the other end of the eighth switch is connected to the fourteenth switch, the other end of the fourteenth switch is connected to the output end of the second interface, one end of the ninth switch is connected to the input end of the second filter, the other end of the ninth switch is connected to the output end of the second filter, one end of the tenth switch is connected to the input end of the second gain amplifier, the other end of the tenth switch is connected to the output end of the second gain amplifier, one end of the eleventh switch is connected to the eighth switch and one end of the fourteenth switch, the other end of the eleventh switch is connected to the input end of the second interface, one end of the twelfth switch is connected to the output end of the second gain amplifier, the other end of the twelfth switch is connected to the input end of the second interface, one end of the thirteenth switch is connected to the input end of the second interface, and the other end of the thirteenth switch is connected to the output end of the first gain amplifier.

[0023] In addition, to achieve the above-mentioned purpose, the present invention also proposes a radio frequency chip, and the radio frequency frequency conversion device includes the above-mentioned radio frequency frequency conversion system.

[0024] In addition, to achieve the above-mentioned purpose, the present invention also proposes a radio frequency frequency conversion device, which includes the above-mentioned radio frequency frequency conversion system.

[0025] In addition, to achieve the above-mentioned purpose, the present invention also proposes a test method for a radio frequency conversion system, the test method for a radio frequency conversion system comprising:

[0026] Adjusting the test signal transmission routes between the RF front end, the filter module, the gain module and the input and output interfaces in the RF frequency conversion system to obtain different test signal transmission routes;

[0027] Testing the RF front end, the filter module, and the gain module through different test signal transmission routes to obtain test data;

[0028] The test performance data of the RF front end, the filter module or the gain module on the transmission route is determined according to the test data output by different transmission routes.

[0029] In one embodiment, the step of adjusting the test signal transmission route between the RF front end, the filter module, the gain module, and the input and output interfaces in the RF frequency conversion system specifically includes:

[0030] Control the on and off of the switch inside the switch module, adjust the test signal transmission route, and obtain a first test signal transmission route for testing the RF front end, a second test signal transmission route for testing the RF front end and the filter module, and a third test signal transmission route for testing the RF front end, the filter module and the gain module.

[0031] In one embodiment, the step of testing the RF front end, the filter module, and the gain module respectively through different test signal transmission routes to obtain test data specifically includes:

[0032] Based on the first test signal transmission route, the radio frequency front end is tested to obtain first test data;

[0033] Based on the second test signal transmission route, the RF front end and the filter module are tested to obtain a second test data group;

[0034] Based on the third test signal transmission route, the RF front end, the filter module and the gain module are tested to obtain a third test data group.

[0035] In one embodiment, the step of determining the test performance data of the RF front end, the filter module or the gain module on the transmission route according to the test data output by different transmission routes specifically includes:

[0036] Calculate the gain performance data in the test performance data of the RF front end, the filter module and the gain module based on the gain cascade formula and the first test data group, the second test data group and the third test data group;

[0037] Calculate the noise performance data in the test performance data of the RF front end, the filter module and the gain module based on the noise cascade formula and the first test data group, the second test data group and the third test data group;

[0038] Based on the linear cascade principle and the first test data group, the second test data group and the third test data group, the linear performance data in the test performance data of the RF front end, the filtering module and the gain module are calculated.

[0039] The present invention provides a radio frequency frequency conversion system. Specifically, in the present invention, in the radio frequency frequency conversion system, after the signal is processed by the radio frequency front end, it passes through the filtering module and the gain module in sequence, and is finally output through the input and output interface; the switch module of the system can realize multiple test modes by controlling the transmission route of the signal between the modules: the signal can be selected to pass through some modules or all modules before being output, and the system collects the test data corresponding to these different transmission routes for subsequent performance parameter calculation.

[0040] In this application, since a switch module is used to control the signal transmission route and a single input and output interface is used to obtain test data of different paths, there is no need to set up a separate test port for each functional module, which effectively solves the problem of large chip area and large number of pins caused by the need for multiple test ports in traditional RF frequency conversion systems, thereby achieving the goal of obtaining performance indicators of each functional module while simplifying the chip structure. This solution not only reduces the number of required test ports by flexibly changing the signal transmission route, but also can collect test data under different combination paths, providing an effective test method for accurately evaluating the performance of each module, and realizing flexible and efficient testing of RF chips. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 the structures shown in these drawings without paying creative work.

[0042] Figure 1 A schematic diagram of a functional module structure provided for the first embodiment of the radio frequency conversion system of the present invention;

[0043] Figure 2 A schematic diagram of a functional module structure provided for the second embodiment of the radio frequency conversion system of the present invention;

[0044] Figure 3 A schematic diagram of a functional module structure provided for the third embodiment of the radio frequency conversion system of the present invention;

[0045] Figure 4 A schematic diagram of a flow chart provided for the fifth embodiment of the radio frequency conversion system of the present invention;

[0046] Figure 5 A flow chart of a sixth embodiment of the radio frequency conversion system of the present invention is provided.

[0047] Description of Figure Numbers:

[0048] Label name Label name 10 RF Front End 20 Filter module 30 Gain Block 40 Input and output interface 50 Switch module 201 First filter 202 Second filter 301 First gain amplifier 302 Second gain amplifier 401 First interface 402 Second interface 501 The first switch unit 502 The second switch unit S1 First switch S2 Second switch S3 Third switch S4 Fourth switch S5 Fifth switch S6 Sixth switch S7 Seventh switch S8 Eighth switch S9 Ninth switch S10 Tenth switch S11 Switch 11 S12 12th switch S13 Switch 13 S14 Switch 14

[0049] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, and back), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0052] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0053] The present invention proposes a first embodiment of the radio frequency conversion system structure diagram, please refer to Figure 1 , the radio frequency conversion system includes: a radio frequency front end 10, a filter module 20, a gain module 30, an input and output interface 40 and a switch module 50;

[0054] The output end of the RF front end 10 is connected to the input end of the filter module 20, the output end of the filter module 20 is connected to the input end of the gain module 30, the output end of the gain module 30 is connected to the input end of the input-output interface 40, and the switch module 50 is connected to the output end of the RF front end 10, the output end of the filter module 20, the output end of the gain module 30, and the input-output interface 40.

[0055] Among them, the RF front end 10 represents a circuit unit for receiving and processing RF signals, which usually includes a RF receiving channel front-end circuit of a low-noise amplifier and a mixer, and is used to amplify the RF input signal and down-convert it to an intermediate frequency signal. The filter module 20 refers to a circuit unit for signal filtering, which represents an intermediate frequency filter circuit, and is used to limit the bandwidth and purify the signal of the intermediate frequency signal after down-conversion. The gain module 30 refers to a circuit unit for signal amplification, which represents an adjustable gain amplifier circuit, and is used to amplify the filtered intermediate frequency signal to meet subsequent processing requirements. The input and output interface 40 represents an input and output port for signal testing, and refers to a test buffer circuit with input and output bidirectional functions. The switch module 50 represents a switch array for controlling the signal transmission path, and refers to a signal path control circuit composed of multiple groups of switches.

[0056] Each functional module plays a different key role in the system: the RF front end 10 is responsible for receiving and down-converting the RF signal (test signal). It first performs low-noise amplification on the received RF signal through a low-noise amplifier, and then uses a mixer to mix the amplified RF signal with the local oscillator signal to convert the signal frequency into an intermediate frequency signal; the filtering module 20 is responsible for bandwidth limitation and spurious suppression of the intermediate frequency signal after down-conversion. By setting specific passband and stopband characteristics, the image frequency components and other interference signals generated by mixing can be effectively filtered out; the gain module 30 provides an adjustable signal amplification function. By adjusting the amplification factor of the gain amplifier, the signal amplitude is ensured to meet the requirements of the subsequent processing circuit; the input and output interface 40 not only serves as the output port of the test signal, but also as the input port of the external test signal to realize bidirectional signal transmission; the switch module 50 realizes flexible switching of the signal transmission path between modules by controlling the on and off states of multiple groups of transmission gates.

[0057] Specifically, the system has multiple working modes during the actual working process: when the RF signal (test signal) is input, it first undergoes low-noise amplification and down-conversion processing by the RF front end 10. At this time, the switch module 50 can be configured into the following test modes: the first mode is to adjust the test signal transmission route through the switch module 50, and directly transmit the test signal processed by the RF front end 10 to the input-output interface 40 for output. This mode can evaluate the performance of the RF front end 10 alone; the second mode is to adjust the test signal transmission route through the switch module 50, so that the signal continues to pass through the filter module 20 for bandwidth limitation and spurious suppression, and then transmit the test signal to the input-output interface 40 for output. This mode can evaluate the overall performance of the RF front end 10 and the filter module 20 after cascading; the third mode is to adjust the test signal transmission route through the switch module 50, so that the signal passes through the RF front end 10, the filter module 20 and the gain module 30 completely, and then transmit the test signal to the input-output interface 40 for output. This mode can evaluate the performance of the complete signal link. In addition to these output test modes, the system also supports an operating mode of injecting test signals into the system through the input and output interface 40: the test signal can be directly injected into the input end of the filter module 20 or the gain module 30 through the switch module 50 to achieve separate testing of specific modules. This mode is particularly suitable for use during system debugging and fault diagnosis. Through these different operating mode combinations, the performance indicators of each functional module in the system can be comprehensively evaluated, providing detailed test data support for system performance optimization.

[0058] In this application, since a switch module 50 is used to control the signal transmission route and a single input / output interface 40 is used to obtain test data of different paths, there is no need to set a separate test port for each functional module, which effectively solves the problem of large chip area and large number of pins caused by the need for multiple test ports in traditional RF frequency conversion systems, thereby achieving the goal of obtaining performance indicators of each functional module while simplifying the chip structure. This solution not only reduces the number of required test ports by flexibly changing the signal transmission route, but also can collect test data under different combination paths, providing an effective test method for accurately evaluating the performance of each module and achieving flexible and efficient testing of RF chips.

[0059] The present invention proposes a second embodiment of the radio frequency conversion system structure diagram, please refer to Figure 2 , this embodiment provides a more specific radio frequency conversion system structure.

[0060] The filter module 20 includes: a first filter 201 and a second filter 202. The gain module 30 includes: a first gain amplifier 301 and a second gain amplifier 302. The input and output interface 40 includes: a first interface 401 and a second interface 402. The switch module 50 includes: a first switch unit 501 and a second switch S2 unit 502.

[0061] The input end of the first filter 201 is connected to the output end of the RF front end 10, the output end of the first filter 201 is connected to the input end of the first gain amplifier 301, the input end of the second filter 202 is connected to the output end of the RF front end 10, and the output end of the second filter 202 is connected to the second gain amplifier 302;

[0062] The output end of the first gain amplifier 301 is connected to the input end of the first interface 401 , and the output end of the second gain amplifier 302 is connected to the input end of the second interface 402 .

[0063] The first switch unit 501 is connected to the output end of the RF front end 10, the output end of the first filter 201, the output end of the first gain amplifier 301, and the output end of the first interface 401, and the second switch S2 unit 502 is connected to the output end of the RF front end 10, the output end of the second filter 202, the output end of the second gain amplifier 302, and the output end of the second interface 402.

[0064] Among them, the first filter 201 and the second filter 202 represent two independent intermediate frequency filter circuit units, which refer to filters used to limit the bandwidth of signals in different frequency ranges, and can specifically adopt low-pass, high-pass or band-pass filter structures. The first gain amplifier 301 and the second gain amplifier 302 refer to two independent variable gain amplifier circuit units, which represent amplifier circuits used to amplify the filtered signal with different gains. The first interface 401 and the second interface 402 represent two independent signal test ports, which refer to test buffer circuits with input and output bidirectional functions, which are used to test the signals of the two signal processing branches respectively. The first switch unit 501 and the second switch S2 unit 502 represent two groups of independent signal path control circuits, which refer to a switch matrix composed of multiple transmission gate switches, which are used to control the signal transmission paths in the two signal processing branches respectively, wherein the first signal processing branch includes: RF front end 10, first filter 201, first gain amplifier 301 and first interface 401. The second signal processing branch includes: RF front end 10, second filter 202, second gain amplifier 302 and second interface 402.

[0065] The function of the first filter 201 is to limit the bandwidth of the signal in the first signal processing branch, and the function of the second filter 202 is to limit the bandwidth of the signal in the second signal processing branch; the function of the first gain amplifier 301 is to amplify the signal after filtering in the first branch, and the function of the second gain amplifier 302 is to amplify the signal after filtering in the second branch; the function of the first interface 401 is to provide an output and input port for the test signal for the first branch, and the function of the second interface 402 is to provide an output and input port for the test signal for the second branch; the function of the first switch unit 501 is to control the signal transmission path of the first branch, and the function of the second switch S2 unit 502 is to control the signal transmission path of the second branch.

[0066] Specifically, the system adopts a dual-branch parallel processing architecture, but based on the design idea of ​​the present invention, the RF frequency conversion system can have more branches, and the down-converted signal output by the RF front end 10 is simultaneously introduced into two independent signal processing branches for parallel processing and testing. In the first branch, through the control of the first switch unit 501, three different signal transmission modes can be realized: Mode 1 is to directly transmit the test signal output by the RF front end 10 to the first interface 401 for test output. This mode can evaluate the performance of the RF front end 10 separately; Mode 2 is to let the test signal pass through the first filter 201 for bandwidth limitation and signal purification, and then transmit it to the first interface 401 for test output. This mode can evaluate the overall performance of the RF front end 10 and the first filter 201 after cascading; Mode 3 is to let the signal pass through the filtering processing of the RF front end 10, the first filter 201 and the amplification processing of the first gain amplifier 301, and then transmit it to the first interface 401 for test output. This mode can evaluate the performance of the complete signal link of the first branch.

[0067] Similarly, in the second branch, the second switch S2 unit 502 can also be configured with these three signal transmission modes: the signal of the RF front end 10 can be directly routed to the second interface 402 through the second switch S2 unit 502 for testing, or the signal can be processed by the second filter 202 before being output for testing, or the signal can be completely processed by the second filter 202 and the second gain amplifier 302 before being output for testing. The advantages of this dual-branch structure are: first, signals in different frequency ranges can be processed and tested at the same time, for example, the first branch is configured to process signals in a lower frequency range, and the second branch is configured to process signals in a higher frequency range; second, the performance under different gain configurations can be tested at the same time, for example, the first branch is configured in a high gain mode to test the processing capability of weak signals, and the second branch is configured in a low gain mode to test the processing capability of stronger signals, which greatly improves the test efficiency.

[0068] In addition to these output test modes, the system also supports injecting test signals into the corresponding branches through the first interface 401 and the second interface 402: in the first branch, the test signal can be input through the first interface 401, and then the signal can be directly injected into the input end of the first filter 201 or the first gain amplifier 301 through the first switch unit 501 to achieve separate testing of specific modules; similarly, in the second branch, similar module separate testing functions can also be achieved through the second interface 402 and the second switch S2 unit 502. This flexible testing mechanism enables the system to evaluate the performance of each module under different working conditions in detail.

[0069] Based on the first and / or second embodiments of the present invention, in the third embodiment of the present invention, the same or similar contents as those of the first and second embodiments can be referred to the above description, and will not be described in detail later. Based on the first and / or second embodiments, this embodiment further proposes a more specific structure of the switch module 50, refer to Figure 3 ,as follows:

[0070] The first switch unit 501 includes: first to seventh switches S7. The second switch S2 unit 502 includes: eighth switches S8 to fourteenth switches S14 which are numbered sequentially.

[0071] One end of the first switch is connected to the output end of the RF front end 10, and the other end of the first switch is connected to the seventh switch S7, and the other end of the seventh switch S7 is connected to the output end of the first interface 401. One end of the second switch S2 is connected to the input end of the first filter 201, and the other end of the second switch S2 is connected to the output end of the first filter 201. One end of the third switch S3 is connected to the input end of the first gain amplifier 301, and the other end of the third switch S3 is connected to the output end of the first gain amplifier 301. One end of the fourth switch S4 is connected to one end of the first switch connected to the seventh switch S7, and the other end of the fourth switch S4 is connected to the input end of the first interface 401. One end of the fifth switch S5 is connected to the output end of the first gain amplifier 301, and the other end of the fifth switch S5 is connected to the input end of the first interface 401. One end of the sixth switch S6 is connected to the input end of the first interface 401, and the other end of the sixth switch S6 is connected to the output end of the second gain amplifier 302.

[0072] One end of the eighth switch S8 is connected to the output end of the RF front end 10, the other end of the eighth switch S8 is connected to the fourteenth switch S14, the other end of the fourteenth switch S14 is connected to the output end of the second interface 402, one end of the ninth switch S9 is connected to the input end of the second filter 202, the other end of the ninth switch S9 is connected to the output end of the second filter 202, one end of the tenth switch S10 is connected to the input end of the second gain amplifier 302, and the other end of the tenth switch S10 is connected to the output end of the second gain amplifier 302. The output end is connected, one end of the eleventh switch S11 is connected to the eighth switch S8, one end of the fourteenth switch S14 is connected, the other end of the eleventh switch S11 is connected to the input end of the second interface 402, one end of the twelfth switch S12 is connected to the output end of the second gain amplifier 302, the other end of the twelfth switch is connected to the input end of the second interface 402, one end of the thirteenth switch S13 is connected to the input end of the second interface 402, and the other end of the thirteenth switch S13 is connected to the output end of the first gain amplifier 301.

[0073] Specifically, the system implements multiple test modes by precisely controlling the combination states of different switches, each of which targets a specific performance test goal:

[0074] In the first test mode, the system mainly tests the performance indicators of the RF front end 10. At this time, the switch configuration is: close the first switch S1, the fourth switch S4, the eighth switch S8 and the eleventh switch S11 so that the test signal output by the RF front end 10 is directly output to the first interface 401 and the second interface 402, and all other switches are closed in this configuration; or open the second switch S2, the ninth switch S9, the third switch S3, the tenth switch S10, the fifth switch S5 and the twelfth switch S12 to bypass the first filter 201, the second filter 202, the first gain amplifier 301 and the second gain amplifier 302, and all other switches are closed in this configuration. In the above two configurations, the key performance parameters of the RF front end 10 can be tested, including: the first down-conversion gain GAIN (RF), the first noise figure NF (RF) and the first linear output third-order intermodulation OIP3 (RF). These data are used as a reference data group for the calculation of subsequent cascade performance.

[0075] In the second test mode, the system tests the overall performance of the RF front end 10 and the first filter 201 after cascading. At this time, the switch configuration is: turn on the third switch S3, the tenth switch S10, the fifth switch S5 and the twelfth switch S12 to bypass the first gain amplifier 301 and the second gain amplifier 302. Under this configuration, the measured performance parameters include: the second down-conversion gain GAIN (RF + FILTER), the second noise figure NF (RF + FILTER) and the second linear output third-order intermodulation OIP3 (RF + FILTER). These data are used as a reference data set for the calculation of subsequent cascade performance.

[0076] In the third test mode, the system tests the performance of the complete signal chain. At this time, the switch configuration is: the fifth switch S5 and the twelfth switch S12 are turned on, and the other switches are turned off, so that the signal passes through the complete processing chain of the RF front end 10, the first filter 201, the second filter 202, the first gain amplifier 301 and the second gain amplifier 302 in sequence. The test parameters include: the third down-conversion gain GAIN_TOTAL, the second noise figure NF_TOTAL and the third linear output third-order intermodulation OIP3_TOTAL.

[0077] Each parameter can be calculated according to the following formula:

[0078] (1) Gain cascade formula: GAIN = GAIN1 + GAIN2 + GAIN3;

[0079] Among them, GAIN1=GAIN(RF), GAIN2=GAIN(FILTER), GAIN3=GAIN(PGA).

[0080] Unit: dB;

[0081] The first test mode can directly test the RF front-end gain (GAIN1), which can be calculated using the following formula:

[0082] GAIN1=GAIN(RF);

[0083] The second test mode can test the RF front end and filter cascade gain, namely:

[0084] GAIN(RF+FILTER)=GAIN1+GAIN2;

[0085] Based on the first test result, the filter gain (GAIN2) can be calculated using the following formula:

[0086] GAIN2=GAIN(RF+FILTER)-GAIN1;

[0087] The third test mode can test the RF front end, filter and PGA cascade gain, namely:

[0088] GAIN_TOTAL=GAIN1+GAIN2+GAIN3;

[0089] The PGA gain (GAIN3) can be calculated based on the second test result, using the following formula:

[0090] GAIN3=GAIN_TOTAL-GAIN1-GAIN2;

[0091] (2) Noise cascade formula: NF (Noise Figure) unit: dB;

[0092]

[0093] Among them, NF1=NF(RF) is the RF front-end noise figure, NF2=NF(filter) is the filter noise figure, and NF3=NF(PGA) is the PGA noise figure. NF (Noise Figure) unit is dB;

[0094] The first test mode can test the RF front-end noise figure, namely:

[0095]

[0096] The second test mode can test the RF front end and filter cascade noise, namely:

[0097]

[0098] According to the first test result NF1 and the gain first test result GAIN1, the filter noise factor NF2 can be calculated;

[0099] The third test mode can test the RF front end, filter and PGA cascade noise figure, namely:

[0100]

[0101] According to the first noise test result NF1, the second noise test result NF2, the first gain test result GAIN1, and the second gain test result GAIN2, the PGA noise factor NF3 can be calculated;

[0102] (3) Linearity cascade formula:

[0103]

[0104] Among them, OIP31=OIP3(RF), OIP32=OIP3(filter), OIP33=OIP3(PGA).

[0105] OIP3 (output third order intercept point) output third order intermodulation, unit: dBm;

[0106] The first test mode can test the RF front-end output third-order intermodulation OIP31, which can be calculated by the following formula:

[0107]

[0108] The second test mode can test the third-order intermodulation of the RF front-end and the filter cascade output. According to the first test result OIP31 and the first gain test result GAIN1, the third-order intermodulation of the filter output OIP32 can be calculated, which can be calculated by the following formula:

[0109]

[0110] The third test mode can test the third-order intermodulation of the cascade output of the RF front end, filter and PGA, namely:

[0111] According to the first gain test result GAIN1, the second gain test result GAIN2, the first output third-order intermodulation test result OIP31, and the second output third-order intermodulation test result OIP32, the PGA output third-order intermodulation OIP33 can be calculated, which can be calculated by the following formula:

[0112]

[0113] This systematic testing method can not only accurately evaluate the independent performance of each module, but also analyze the mutual influence between modules. For example, it can find the contribution of the filter to the system noise and the influence of the gain amplifier on the system linearity. These detailed test data provide a reliable basis for system performance optimization and problem diagnosis.

[0114] In addition, based on the above-mentioned radio frequency conversion system, the present invention also provides a radio frequency conversion method. It should be noted that the execution subject of this embodiment can be a computing service device with data processing, network communication and program running functions, such as a tablet computer, a personal computer, a mobile phone, etc., or an electronic device capable of realizing the above functions, etc. The following takes a device including a radio frequency conversion system as an example to illustrate this embodiment and the following embodiments.

[0115] Based on this, the fourth embodiment of the present invention provides a radio frequency conversion method, referring to Figure 4 , Figure 4This is a flow chart of the fourth embodiment of the radio frequency conversion method.

[0116] Step S10, adjusting the test signal transmission route between the RF front end 10, the filter module 20, the gain module 30 and the input / output interface 40 in the RF frequency conversion system to obtain different test signal transmission routes;

[0117] The test signal transmission route refers to the signal transmission path between different functional modules in the system, indicating the flow path of the test signal in the system. Adjustment refers to the process of changing the signal connection mode in the system by controlling the switch matrix, which is used to configure different test paths.

[0118] This step is performed before the system starts performance testing and is used to establish different test scenarios. By properly configuring the signal path, the performance of a single module or multiple modules in cascade can be tested.

[0119] Specifically, you first need to determine the combination of modules to be tested, and then configure the path by controlling the corresponding switches. For example, to test the performance of the RF front end 10, turn on the switch of the direct path and turn off the switches of other modules; to test the cascade performance of the RF front end 10 and the filter, turn on the input and output switches of the corresponding modules and ensure that the signal can flow through these modules correctly; to test the complete signal chain, you need to configure the path in which all modules participate in signal processing.

[0120] In some embodiments, the signal path can be adjusted in a variety of ways: optionally, first analyze the test requirements to determine the path type that needs to be configured, then set the switch state according to the switch control truth table, and finally verify the connectivity of the signal path; optionally, select a preset test mode through the test software interface, and the system automatically configures the corresponding switch state to complete the path adjustment. It is understandable that other methods can also be used to configure the signal path, such as using hardware configuration registers, programmable logic control, etc., which are not limited here.

[0121] Step S20, testing the RF front end 10, the filter module 20, and the gain module 30 through different test signal transmission routes to obtain test data;

[0122] The test data refers to the system performance parameters collected under a specific signal path, and refers to the original measurement results obtained by the test instrument. The test process refers to the operation of inputting a standard test signal to the system and collecting the output response to obtain performance data.

[0123] This step is performed after the signal path configuration is completed, and is used to collect performance data under different test scenarios. The test process needs to consider the setting of test conditions such as signal frequency and power level.

[0124] Specifically, for each configured signal path, a series of standard tests need to be performed. First, set the signal source to output a suitable test signal, including selecting a suitable frequency point and setting an appropriate signal level; then use the test instrument to collect various parameters of the output signal, such as gain, phase, noise, etc.; finally, save the test data and mark the corresponding test path configuration.

[0125] Step S30, determining the test performance data of the RF front end 10, the filter module 20 or the gain module 30 on the transmission route according to the test data output by different transmission routes;

[0126] Among them, the test performance data refers to the performance indicators of each functional module obtained after processing, which represents the actual working characteristics of the module. The data processing process refers to the method of calculating the performance of a single module using the cascade formula, which is used to extract module performance from system test data.

[0127] This step is performed after all test data collection is completed, and is used to analyze and process the test results to obtain independent performance indicators for each module.

[0128] Specifically, we first collect the raw data of different test paths, and then use mathematical calculations to separate the performance parameters of each module based on the cascade formula in circuit theory. For example, by comparing the gain data of different paths, we can calculate the gain of a single module; by using the noise coefficient formula, we can calculate the noise contribution of each module; and by using linearity data, we can evaluate the distortion characteristics of each module.

[0129] In some embodiments, performance data processing can be implemented in a variety of ways: optionally, firstly establish a mathematical model to describe the module cascade relationship, then substitute the test data into the equation to solve the equation, and finally obtain the module performance parameters; optionally, firstly process the raw data through a software algorithm, then perform error analysis and correction, and finally generate a performance report. It is understandable that other methods can also be used to implement performance data processing and analysis, such as statistical modeling, machine learning, etc., which are not limited here.

[0130] In general, the system first establishes a variety of different test signal transmission routes between the RF front end 10, the filter module 20, the gain module 30 and the input and output interface 40 of the RF frequency conversion system by controlling the internal signal connection relationship. Through this flexible path configuration method, the system can establish multiple independent test scenarios. Then, the system performs comprehensive performance tests on these different transmission routes in turn, and collects various test data, including but not limited to various key performance parameters. Finally, the system analyzes and compares the test data obtained from different transmission routes, combines the module composition characteristics of each transmission route, and successfully extracts the performance indicators of each functional module, thereby completing the performance evaluation of each component of the system.

[0131] In the embodiment of the present application, due to the innovative use of a method of adjusting the test signal transmission route, multiple groups of test data are obtained by configuring different signal transmission paths, and the performance indicators of each module are determined through data analysis, so that the performance characteristics of each functional module can be evaluated without disassembling the system, which effectively solves the technical problem that it is difficult to accurately evaluate the performance of a single module in traditional RF system testing, thereby realizing the accurate measurement and evaluation of the performance of each functional module within the RF frequency conversion system. At the same time, the method is also characterized by simple operation and controllable test process, which significantly improves the practicality and feasibility of the test. In addition, by adopting a multi-path testing solution, the method also provides richer data support for the performance analysis and optimization of the RF system, which helps to improve the system development efficiency and product quality. This innovative testing method not only avoids the disadvantage of the need to disassemble the system in traditional testing methods, but also provides a more convenient and practical solution for the performance evaluation of the RF system.

[0132] Based on the fourth embodiment of the present invention, in the fifth embodiment of the present invention, the same or similar contents as those in the fourth embodiment can be referred to the above introduction, and will not be described in detail later. Figure 5 Based on the fifth embodiment, this embodiment provides a more specific radio frequency conversion method as follows:

[0133] Step S201, controlling the on and off of the internal switch of the switch module 50, adjusting the test signal transmission route, obtaining a first test signal transmission route for testing the RF front end 10, a second test signal transmission route for testing the RF front end 10 and the filter module 20, and a third test signal transmission route for testing the RF front end 10, the filter module 20 and the gain module 30;

[0134] Among them, the on and off of the internal switch of the switch module 50 refers to the on and off state of each transmission gate switch in the control system, which is used to configure the signal transmission path. The first test signal transmission route represents a test path that only includes the RF front end 10, which refers to the path where the signal directly reaches the test interface from the output of the RF front end 10. The second test signal transmission route represents a cascade test path including the RF front end 10 and the filter, which is used to measure the impact of the filter on the system performance. The third test signal transmission route represents a complete signal processing link, which refers to the test path where the signal passes through the RF front end 10, the filter module 20 and the gain module 30 in sequence.

[0135] This step is performed after the system is initialized and before specific tests are started. It is used to establish three different standard test scenarios. By scientifically configuring these three test paths, the performance contribution of each module can be systematically evaluated.

[0136] Specifically, first, it is necessary to determine the configuration of three standard test paths according to the test requirements. For the first test signal transmission route, turn on the switch at the output end of the RF front end 10 and the direct path switch, and turn off all other switches, so that the signal bypasses the filter (filter module 20) and the gain amplifier (gain amplifier module) and directly reaches the test interface, so that the performance indicators of the RF front end 10 can be tested separately; for the second test signal transmission route, in addition to maintaining the connection of the RF front end 10, it is also necessary to turn on the switch at the input and output ends of the filter, so that the signal passes through the RF front end 10 and the filter in turn and reaches the test interface, so that the gain, noise and linearity changes introduced by the filter can be evaluated; for the third test signal transmission route, it is necessary to turn on the switches related to all signal processing modules so that the signal can pass through the entire processing link completely, so that the comprehensive performance of the system can be tested. After each path configuration is completed, connectivity verification is required to ensure that the signal can flow through the expected module correctly.

[0137] In some embodiments, the configuration of the test path can be implemented in a variety of ways: optionally, first formulate a switch control timing table to clarify the state requirements of each switch under different test paths, then set the switch state one by one through the control register, and finally verify the correctness of the signal path with an oscilloscope or spectrum analyzer; optionally, first develop a dedicated test software interface, including three graphical selection options for standard test paths, then automatically calculate the required switch configuration through the software, and finally automatically complete the setting and verification of the switch state through the test program. It is understandable that other methods can also be used to implement the configuration of the test path, such as using a field programmable gate array to implement the switch control logic, or using a microcontroller to execute a preset configuration program, etc., which are not limited here.

[0138] Step S202, testing the RF front end 10 based on the first test signal transmission route to obtain first test data;

[0139] The first test data refers to the performance parameters of the RF front end 10 measured through the first test signal transmission route, indicating the independent working characteristics of the RF front end 10. The first test data includes a first down-conversion gain GAIN(RF), a first noise factor NF(RF), and a first linear coefficient OIP3(RF), which are used to characterize the basic performance indicators of the RF front end 10.

[0140] This step is performed after the first test signal transmission route configuration is completed, and is used to obtain the benchmark performance data of the RF front end 10. These data will be used as reference values ​​for subsequent calculations of the performance of other modules.

[0141] Specifically, first, it is necessary to set appropriate test conditions, including parameters such as input signal frequency and power level. Then, the various performance indicators of the RF front end 10 are collected through the test equipment: for gain test, the amplitude-frequency response measurement at different frequencies is adopted; for noise test, the Y factor method is adopted to measure the noise coefficient; for linearity test, the dual-tone method is adopted to measure the third-order intermodulation performance. All test data need to be measured multiple times to take the average value to improve data reliability.

[0142] Step S203, based on the second test signal transmission route, the RF front end 10 and the filter module 20 are tested to obtain a second test data group;

[0143] The second test data represents the system performance parameters after the RF front end 10 and the filter module 20 are cascaded, and refers to the test results including the influence of the filter module 20. The second test data includes: the second down-conversion gain GAIN (RF + FILTER), the second noise factor NF (RF + FILTER) and the second linear output third-order intermodulation OIP3 (RF + FILTER). It is used to evaluate the influence of the filter on the system performance.

[0144] This step is performed after completing the configuration of the second test signal transmission route, and is used to measure the change in system performance after the introduction of the filter module 20. By comparing with the first test data, the performance contribution of the filter module 20 can be analyzed.

[0145] Specifically, first maintain the same test signal conditions as the first test to ensure the comparability of the test results. Then measure the performance indicators of the cascade system: focus on the frequency response characteristics of the filter module 20, including parameters such as passband gain, out-of-band suppression and group delay; at the same time, measure the change in noise performance and evaluate the noise contribution introduced by the filter module 20.

[0146] Step S204, based on the third test signal transmission route, the RF front end 10, the filter module 20 and the gain module 30 are tested to obtain a third test data group;

[0147] The third test data represents the system performance parameters of the complete signal chain, which refers to the final test results affected by all modules including the RF front end 10, the filter module 20, the gain module 30, etc. The third test data includes: the third down-conversion gain GAIN_TOTAL, the second noise factor NF_TOTAL and the third linear output third-order intermodulation OIP3_TOTAL. It is used to evaluate the linear performance of the entire system.

[0148] This step is performed after the third test signal transmission route configuration is completed, and is used to measure the final performance indicators of the system. These data reflect the performance level of the system under actual working conditions.

[0149] Specifically, we first maintained the same test conditions as the previous two tests. Then we fully tested the system performance: measured the gain response over the entire frequency range to verify the system bandwidth and flatness; measured the full-link noise figure to evaluate the system's minimum detectable signal level; measured the system's dynamic range and linearity to determine the system's signal processing capabilities.

[0150] Step S205, calculating the gain performance data in the test performance data of the RF front end 10, the filter module 20 and the gain module 30 based on the gain cascade formula and the first test data group, the second test data group and the third test data group;

[0151] The gain cascade formula indicates the gain calculation method when multiple amplifiers are connected in series, which refers to the gain addition in the dB domain. The gain performance data indicates the signal amplification or attenuation capability of each module, and is used to characterize the impact of the module on the signal amplitude. The test data group refers to the system gain data measured under different test paths, indicating the total gain value of each cascade combination.

[0152] This step is performed after obtaining three sets of test data to separate and calculate the actual gain value of each module. By comparing and analyzing the gain differences of different cascade combinations, the gain contribution of each module can be accurately evaluated.

[0153] Specifically, firstly, the gain value GAIN(RF) of the RF front end 10 is directly obtained using the first test data group; then the gain value GAIN(RF) of the RF front end 10 is subtracted from the second down-conversion gain GAIN(RF+FILTER) of the second test data to obtain the gain value GAIN(FILTER) of the filter module 20; finally, the gain value (GAIN3) of the gain module 30 is obtained by subtracting the first two-stage gains from the total gain of the third test data group. The influence of measurement error and system uncertainty needs to be considered in the calculation process, and multiple measurements are performed to obtain the average value if necessary.

[0154] Step S206, calculating the noise performance data in the test performance data of the RF front end 10, the filter module 20 and the gain module 30 based on the noise cascade formula and the first test data group, the second test data group and the third test data group;

[0155] The noise cascade formula refers to the noise coefficient calculation formula when multiple amplifiers are connected in series. The noise performance data refers to the noise coefficient of each module, which is used to characterize the degree of influence of the module on the signal quality. The cascade noise calculation needs to consider the influence of each stage gain and noise at the same time.

[0156] This step is performed after the gain data is obtained to calculate the noise contribution of each module. By inversely calculating the cascade noise formula, the noise coefficient of each module can be separated.

[0157] Specifically, the noise factor NF(RF) of the RF front end 10 is first obtained using the first test data; then the noise factor NF2 of the filter module 20 is calculated by combining the known RF front end gain GAIN1 and the second test data NF(RF+FILTER); finally, the noise factor NF3 of the gain module 30 can be calculated using the complete cascade formula according to the first noise test result NF1, the second noise test result NF2, the first gain test result GAIN1, and the second gain test result GAIN2. The influence of factors such as temperature and bandwidth needs to be considered during the calculation process.

[0158] Step S207, calculating linear performance data in the test performance data of the RF front end 10, the filter module 20 and the gain module 30 based on the linear cascade principle and the first test data group, the second test data group and the third test data group;

[0159] The linear performance data represents the signal distortion characteristics of each module. The linear cascade principle refers to the linearity calculation method of a multi-level system, which is used to evaluate the overall signal distortion of the system.

[0160] This step is performed after the gain and noise analysis is completed to evaluate the impact of each module on the system linearity. By analyzing the linearity changes of different cascade combinations, the distortion characteristics of each module can be determined.

[0161] Specifically, firstly, the OIP3(RF) value of the RF front end 10 is obtained from the first test data; then, according to the OIP3(RF) in the first test data and the GAIN(RF) in the first test data, the output third-order intermodulation OIP32 of the filter module 20 can be calculated; finally, according to the linearity cascade formula and the GAIN(RF) in the first test data, the filter module gain value GAIN(FILTER), the output third-order intermodulation first test result OIP31 of the RF front end 10, and the output third-order intermodulation OIP32 of the filter module 20, the output third-order intermodulation OIP33 of the gain module 30 can be calculated. The calculation process needs to consider the influence of each level of gain on linearity, especially the nonlinear effect under large signal conditions.

[0162] In general, the system first establishes three standardized test signal transmission routes by precisely controlling the on and off states of the switches inside the switch module 50: a first test route that only includes the RF front end 10, a second test route that includes the RF front end 10 and the filter module 20, and a third test route that includes the complete signal chain. Then, the system performs tests in these three route configurations in turn, and obtains the first test data, the second test data group, and the third test data group, respectively. Afterwards, the system uses scientific data processing methods to analyze from three dimensions: gain performance, noise performance, and linear performance: the gain characteristics of each module are calculated using the gain cascade relationship, the noise cascade formula is applied to determine the noise performance of each module, and the linearity characteristics of each module are evaluated based on the linear cascade principle, and finally the complete performance indicators of each functional module are obtained.

[0163] In the embodiment of the present application, due to the use of a systematic test path configuration scheme, the functional modules in the test link are added in a step-by-step manner, and the standardized test process and data processing method are combined, so that the specific performance parameters of each functional module can be accurately obtained and separated under the premise of maintaining the integrity of the system, which effectively solves the technical problem that it is difficult to accurately distinguish the performance contribution of each module in the traditional test method, and thus realizes the accurate evaluation and quantitative analysis of the performance of each functional module in the RF frequency conversion system. At the same time, the method significantly improves the repeatability and reliability of the test by establishing a standardized test path and data processing flow. In addition, this step-by-step test and analysis method not only provides more detailed and accurate performance data, but also provides strong data support for system performance optimization and fault diagnosis, which helps to improve product research and development efficiency and quality control level. This innovative test scheme not only avoids the inconvenience of repeatedly disassembling and assembling the system in the traditional test method, but also provides a more scientific and efficient solution for the performance evaluation and quality control of the RF system.

[0164] An embodiment of the present invention further provides a radio frequency chip, in which the radio frequency conversion system is provided.

[0165] An embodiment of the present invention further provides a radio frequency frequency conversion device, wherein the radio frequency frequency conversion system is provided in the radio frequency frequency conversion device.

[0166] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A radio frequency conversion system, characterized in that: The radio frequency conversion system includes: a radio frequency front end, a filter module, a gain module, an input and output interface and a switch module; The output end of the RF front end is connected to the input end of the filter module, the output end of the filter module is connected to the input end of the gain module, the output end of the gain module is connected to the input end of the input-output interface, and the switch module is connected to the output end of the RF front end, the output end of the filter module, the output end of the gain module, and the input-output interface; The switch module is used to change the test signal transmission route between the RF front end, the filter module, the gain module and the input and output interface; The input and output interface is used to output test data corresponding to different transmission routes, and the test data is used to calculate test performance data.

2. The radio frequency conversion system according to claim 1, characterized in that: The filtering module includes: a first filter and a second filter; The gain module comprises: a first gain amplifier and a second gain amplifier; The input and output interface includes: a first interface and a second interface; The input end of the first filter is connected to the output end of the RF front end, the output end of the first filter is connected to the input end of the first gain amplifier, the input end of the second filter is connected to the output end of the RF front end, and the output end of the second filter is connected to the second gain amplifier; The output end of the first gain amplifier is connected to the input end of the first interface, and the output end of the second gain amplifier is connected to the input end of the second interface.

3. The radio frequency conversion system according to claim 2, characterized in that: The switch module comprises: a first switch unit and a second switch unit; The first switch unit is connected to the output end of the RF front end, the output end of the first filter, the output end of the first gain amplifier, and the output end of the first interface, and the second switch unit is connected to the output end of the RF front end, the output end of the second filter, the output end of the second gain amplifier, and the output end of the second interface; The first switch unit is used to test the RF front end, the first filter, and the first gain amplifier by changing a test signal flow route of a first branch consisting of the RF front end, the first filter, the first gain amplifier, and the first interface; The second switch unit is used to test the RF front end, the second filter, and the second gain amplifier by changing the test signal flow route of the second branch consisting of the RF front end, the second filter, the second gain amplifier, and the second interface.

4. The radio frequency conversion system according to claim 3, characterized in that: The first switch unit includes: a first switch to a seventh switch; One end of the first switch is connected to the output end of the RF front end, the other end of the first switch is connected to the seventh switch, the other end of the seventh switch is connected to the output end of the first interface, one end of the second switch is connected to the input end of the first filter, the other end of the second switch is connected to the output end of the first filter, one end of the third switch is connected to the input end of the first gain amplifier, the other end of the third switch is connected to the output end of the first gain amplifier, one end of the fourth switch is connected to the first switch and one end of the seventh switch, the other end of the fourth switch is connected to the input end of the first interface, one end of the fifth switch is connected to the output end of the first gain amplifier, the other end of the fifth switch is connected to the input end of the first interface, one end of the sixth switch is connected to the input end of the first interface, and the other end of the sixth switch is connected to the output end of the second gain amplifier; The second switch unit includes: an eighth switch to a fourteenth switch numbered sequentially; One end of the eighth switch is connected to the output end of the RF front end, the other end of the eighth switch is connected to the fourteenth switch, the other end of the fourteenth switch is connected to the output end of the second interface, one end of the ninth switch is connected to the input end of the second filter, the other end of the ninth switch is connected to the output end of the second filter, one end of the tenth switch is connected to the input end of the second gain amplifier, the other end of the tenth switch is connected to the output end of the second gain amplifier, one end of the eleventh switch is connected to the eighth switch and one end of the fourteenth switch, the other end of the eleventh switch is connected to the input end of the second interface, one end of the twelfth switch is connected to the output end of the second gain amplifier, the other end of the twelfth switch is connected to the input end of the second interface, one end of the thirteenth switch is connected to the input end of the second interface, and the other end of the thirteenth switch is connected to the output end of the first gain amplifier.

5. A radio frequency chip, characterized in that: The radio frequency chip comprises the radio frequency conversion system as described in any one of claims 1 to 4.

6. A radio frequency conversion device, characterized in that: The radio frequency conversion device comprises the radio frequency conversion system as claimed in any one of claims 1 to 4.

7. A method for testing a radio frequency conversion system, characterized in that: The testing method of the radio frequency conversion system comprises: Adjusting the test signal transmission routes between the RF front end, the filter module, the gain module and the input and output interfaces in the RF frequency conversion system to obtain different test signal transmission routes; Testing the RF front end, the filter module, and the gain module through different test signal transmission routes to obtain test data; The test performance data of the RF front end, the filter module or the gain module on the transmission route is determined according to the test data output by different transmission routes.

8. The method for testing a radio frequency conversion system according to claim 7, characterized in that: The step of adjusting the test signal transmission route between the RF front end, the filter module, the gain module and the input and output interface in the RF frequency conversion system specifically includes: Control the on and off of the switch inside the switch module, adjust the test signal transmission route, and obtain a first test signal transmission route for testing the RF front end, a second test signal transmission route for testing the RF front end and the filter module, and a third test signal transmission route for testing the RF front end, the filter module and the gain module.

9. The method for testing a radio frequency conversion system according to claim 8, characterized in that: The step of testing the RF front end, the filter module, and the gain module respectively through different test signal transmission routes to obtain test data specifically includes: Based on the first test signal transmission route, the radio frequency front end is tested to obtain first test data; Based on the second test signal transmission route, the RF front end and the filter module are tested to obtain a second test data group; Based on the third test signal transmission route, the RF front end, the filter module and the gain module are tested to obtain a third test data group.

10. The method for testing a radio frequency conversion system according to claim 9, characterized in that: The step of determining the test performance data of the RF front end, the filter module or the gain module on the transmission route according to the test data output from different transmission routes specifically includes: Calculate the gain performance data in the test performance data of the RF front end, the filter module and the gain module based on the gain cascade formula and the first test data group, the second test data group and the third test data group; Calculate the noise performance data in the test performance data of the RF front end, the filter module and the gain module based on the noise cascade formula and the first test data group, the second test data group and the third test data group; Based on the linear cascade principle and the first test data group, the second test data group and the third test data group, the linear performance data in the test performance data of the RF front end, the filtering module and the gain module are calculated.

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