Radio frequency line loss calibration system
By combining RF switch paths and broadband matrix RF switches, the problem of insufficient ports in the integrated test instrument is solved, multi-port RF line loss calibration is achieved, testing costs are reduced, and automated testing is supported.
Patent Information
- Application Number
- CN202423177647.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2034-12-23
AI Technical Summary
The existing integrated test instrument has an insufficient number of ports, which cannot meet the automated testing requirements of multi-band and multi-antenna port RF terminal products. Furthermore, the existing RF line loss calibration instrument cannot meet the multi-port calibration testing requirements, resulting in increased testing costs.
By employing multiple RF switch paths and a broadband matrix RF switch, combined with multiple test cavities of the calibration fixture, the RF channels of the integrated tester are expanded, and line loss calibration testing is performed under the control of a host computer.
It enables multi-port RF line loss calibration, reduces testing costs, supports automated testing, and saves on the number of testing devices and floor space.
Smart Images
Figure CN223827809U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to radio frequency terminal test technical field, especially relate to a radio frequency line loss calibration system. BACKGROUND
[0002] The port of the comprehensive tester on the market only has 8, and faces the board end test of increasingly complex multi-frequency band, multi-antenna port radio frequency terminal product, cannot satisfy the condition that more than 8 ports are measured by single instrument, and the related art usually needs to manually replace the radio frequency channel, or splits into multiple test workstations, is not conducive to automatic test, and will increase the test cost.In addition, with the increase of the number of ports, the port of the current radio frequency line loss calibration instrument cannot satisfy the calibration test demand. UTILIT Y MODEL CONTENT
[0003] The utility model aims at at least solving one of the technical problems in prior art. For this purpose, the utility model provides a radio frequency line loss calibration system, which can satisfy the radio frequency line loss calibration demand of multiple ports.
[0004] The utility model embodiment provides a radio frequency line loss calibration system, which comprises:
[0005] A comprehensive tester;
[0006] A calibration fixture has multiple test cavities, and the test cavities include at least one of a short-circuit test cavity and an open-circuit test cavity;
[0007] One or more wideband matrix radio frequency switches have multiple input ports, multiple output ports, and multiple radio frequency switch paths, the number of output ports of the wideband matrix radio frequency switch is greater than the number of input ports, each input port of the wideband matrix radio frequency switch is connected to a corresponding output port of the comprehensive tester, the input end of each radio frequency switch path is connected to a corresponding input port, the output end of the multiple radio frequency switch paths is connected to the multiple output ports of the wideband matrix radio frequency switch, and the output ports of the wideband matrix radio frequency switch are connected to the multiple test cavities through wires.
[0008] A host computer is connected to the comprehensive tester and the wideband matrix radio frequency switch.
[0009] According to some embodiments of the utility model, the calibration fixture includes a bottom plate and a test plate, a plurality of short-circuit probes are arranged on the bottom plate, a short-circuit test cavity adapted to the short-circuit probes is arranged on the test plate, and the short-circuit probes are located in the short-circuit test cavity.
[0010] According to some embodiments of the utility model, the calibration fixture includes a bottom plate and a test plate, the test plate is installed on the bottom plate, and a plurality of open-circuit test cavities are arranged on the test plate.
[0011] According to some embodiments of the utility model, the calibration fixture includes a bottom plate and a test plate, a plurality of short-circuit probes are arranged on the bottom plate, short-circuit test cavities and open-circuit test cavities are arranged on the test plate, the short-circuit test cavities are adapted to the short-circuit probes, and the short-circuit probes are located in the short-circuit test cavities.
[0012] According to some embodiments of the utility model, the wire includes a first loop line and a second loop line, and the first loop line and the second loop line are mutually disconnected.
[0013] According to some embodiments of the utility model, the end portions of the first loop line and the second loop line are flush, or the end portions of the first loop line and the second loop line are connected with a loop interface.
[0014] According to some embodiments of the utility model, the radio frequency switch path includes a first switch module, a second switch module and a third switch module, the input end of each first switch module is connected with one input port, the output end of each first switch module is connected in cascade with the input ends of a plurality of second switch modules, the output end of each third switch module is connected with one output port, and the input end of each third switch module is connected in cascade with the output ends of a plurality of second switch modules.
[0015] According to some embodiments of the utility model, the number of second switch modules is four.
[0016] According to some embodiments of the utility model, the first switch module, the second switch module and the third switch module all adopt radio frequency switch integrated circuits of the same type.
[0017] According to some embodiments of the utility model, the number of input ports of the wideband matrix radio frequency switch is four, and the number of output ports of the wideband matrix radio frequency switch is sixteen.
[0018] The utility model embodiment has at least the following beneficial effects:
[0019] The connection of the input port and the output port is realized through the multi-path radio frequency switch path, the radio frequency channel of the comprehensive tester can be expanded, the problem of few ports of the comprehensive tester can be effectively solved by the wideband matrix radio frequency switch, the test cost is reduced, the calibration fixture has a plurality of test cavities, the radio frequency line loss calibration requirement of the multi-port can be met, the line loss calibration test of the comprehensive tester and the wideband matrix radio frequency switch is controlled by the host computer.
[0020] The additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter in the description of embodiments of the present application. BRIEF DESCRIPTION OF DRAWINGS
[0021] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description of embodiments, given by way of example, and with reference to the following drawings, wherein:
[0022] Figure 1 A principle block diagram of a radio frequency line loss calibration system of an embodiment of the present application;
[0023] Figure 2 An internal schematic diagram of a wideband matrix radio frequency switch of an embodiment of the present application;
[0024] Figure 3 A top view plane schematic diagram one of a calibration fixture of an embodiment of the present application;
[0025] Figure 4 A top view plane schematic diagram two of a calibration fixture of an embodiment of the present application;
[0026] Figure 5 A top view plane schematic diagram three of a calibration fixture of an embodiment of the present application;
[0027] Figure 6 An internal principle schematic block diagram of a wideband matrix radio frequency switch of an embodiment of the present application;
[0028] Figure 7 A circuit principle diagram of a first switch module and a second switch module of a wideband matrix radio frequency switch of an embodiment of the present application;
[0029] Figure 8 A circuit principle diagram of one of a third switch module of a wideband matrix radio frequency switch of an embodiment of the present application.
[0030] Reference signs:
[0031] Comprehensive tester 100, calibration fixture 200, short circuit test cavity 201, open circuit test cavity 202, bottom plate 210, short circuit probe 211, test plate 220, wideband matrix radio frequency switch 300, first switch module 310, second switch module 320, third switch module 330, upper computer 400. DETAILED DESCRIPTION
[0032] The embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary only, and are used for explaining the present application, and should not be understood as a limitation of the present application.
[0033] In the description of the present application, the meaning of "several" is one or more, the meaning of "multiple" is two or more, greater than, less than, more than, etc. are understood as not including the number, "above", "below", "within", etc. are understood as including the number. If there is a description of "first", "second", etc. is only used to distinguish technical features for the purpose, and should not be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the order of indicated technical features.
[0034] In the description of the present application, unless otherwise explicitly limited, the words "set", "install", "connect" and the like should be broadly understood, and the skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.
[0035] Please refer to Figure 1 The embodiment discloses a kind of radio frequency line loss calibration systems, including comprehensive tester 100, calibration fixture 200, wideband matrix radio frequency switch 300 and host computer 400, calibration fixture 200 has multiple test cavities, test cavity includes at least one of short-circuit test cavity 201 and open-circuit test cavity 202, the number of wideband matrix radio frequency switch 300 is one or more, for example 2. Wideband matrix radio frequency switch 300 has multiple input ports, multiple output ports and multiple radio frequency switch paths, the number of output ports of wideband matrix radio frequency switch 300 is more than the number of input ports, each input port of wideband matrix radio frequency switch 300 is connected with the corresponding output port of comprehensive tester 100 respectively, the output port of comprehensive tester 100 can be channel expansion,
[0036] Please refer to Figure 2 The number of input ports of wideband matrix radio frequency switch 300 is 4 (such as Figure 2 Port marked A~D in figure), the number of output ports of wideband matrix radio frequency switch 300 is 16 (such as Figure 2The 4-channel can be expanded to 16 channels by the wideband matrix RF switch 300 (as shown in the ports #1, #2, …, #15, #16). The input end of each RF switch channel is connected to the corresponding input port, the output end of the multi-channel RF switch is connected to the multiple output ports of the wideband matrix RF switch 300, and the output ports of the wideband matrix RF switch 300 are connected to the multiple test cavities through wires. The host computer 400 is connected to the comprehensive tester 100 and the wideband matrix RF switch 300. The number of output ports is more than that of input ports, which can expand the RF channel of the comprehensive tester 100. The wideband matrix RF switch 300 can effectively solve the problem of too few ports of the comprehensive tester 100, which is conducive to reducing the test cost.
[0037] In some application examples, please refer to Figure 3 The calibration fixture 200 includes a bottom plate 210 and a test plate 220. The bottom plate 210 is provided with a plurality of short-circuit probes 211, and the test plate 220 is provided with a short-circuit test cavity 201 adapted to the short-circuit probes 211, and the short-circuit probes 211 are located in the short-circuit test cavity 201. The wire includes a first loop line and a second loop line, and the first loop line and the second loop line are disconnected. When the wire is inserted into the short-circuit test cavity 201, the short-circuit probes 211 contact the first loop line and the second loop line of the wire, so that the first loop line and the second loop line are short-circuited, thereby realizing short-circuit test calibration. Alternatively, the short-circuit probes 211 contact one of the first loop line and the second loop line, and the other of the first loop line and the second loop line contacts the inner wall of the short-circuit test cavity 201, and the short-circuit probes 211 and the inner wall of the short-circuit test cavity 201 are short-circuited, thereby realizing the short-circuit of the first loop line and the second loop line.
[0038] In some application examples, please refer to Figure 4 The calibration fixture 200 includes a bottom plate 210 and a test plate 220. The test plate 220 is installed on the bottom plate 210, and the test plate 220 is provided with a plurality of open-circuit test cavities 202. The open-circuit test cavity 202 is a semi-enclosed cavity. When the wire is inserted into the open-circuit test cavity 202, the first loop line and the second loop line of the wire are in an open-circuit state, thereby realizing open-circuit test calibration.
[0039] In some application examples, please refer to Figure 5 The calibration fixture 200 includes a bottom plate 210 and a test plate 220. The bottom plate 210 is provided with a plurality of short-circuit probes 211, and the test plate 220 is provided with a short-circuit test cavity 201 and an open-circuit test cavity 202. The short-circuit test cavity 201 is adapted to the short-circuit probes 211, and the short-circuit probes 211 are located in the short-circuit test cavity 201. The short-circuit test cavity 201 and the open-circuit test cavity 202 have small volumes and can be provided in multiple on the test plate 220, thereby meeting the increasing demand for line loss calibration of the number of ports.
[0040] The wire includes a first loop line and a second loop line, the first loop line and the second loop line are mutually disconnected, the ends of the first loop line and the second loop line are flush, when the first loop line and the second loop line are inserted into the short circuit test cavity 201, the first loop line and the second loop line can be in contact with the short circuit probe 211, so as to realize the short circuit of the first loop line and the second loop line. Alternatively, the ends of the first loop line and the second loop line are connected with loop interfaces, the structure of the loop interfaces is matched with the short circuit test cavity 201 or the open circuit test cavity 202 to meet the test requirements.
[0041] Please refer to Figure 6 The radio frequency switch path includes a first switch module 310, a second switch module 320 and a third switch module 330, the input end of each first switch module 310 is connected with an input port, the output end of each first switch module 310 is connected with the input end of a plurality of second switch modules 320 in cascade, the output end of each third switch module 330 is connected with an output port, and the input end of each third switch module 330 is connected with the output end of a plurality of second switch modules 320 in cascade. For example, the number of radio frequency switch paths is 4, and the 4 radio frequency switch paths are numbered A, B, C and D in turn, and the number of input ports is also 4, and the 4 input ports are named as port A, port B, port C and port D. Taking the radio frequency switch path numbered A as an example, Figure 7 The circuit principle diagram of the first switch module 310 and the 4 second switch modules 320 is shown in Similarly, for the radio frequency switch path numbered B, each second switch module 320 is numbered B1, B2, B3 and B4 in turn, and the same is true for the other radio frequency switch paths. Figure 8The circuit schematic of one of the third switch modules 330 is shown in the figure, and the number of the third switch modules 330 is 16, and the 16 third switch modules 330 are evenly divided into 4 groups, and the 4 third switch modules 330 in each group correspond to the radio frequency switch paths numbered A, B, C and D respectively. The number of output ports is 16, and they are sequentially named as port #A1, port #A2, port #A3, …, port #A16. Taking port #A1 as an example, the port #A1 is connected with the output end of one of the third switch modules 330, and the third switch module 330 has 4 input ends, and the 4 input ends are respectively connected with one of the output ends of the module A1 (as shown by the mark A1-5), one of the output ends of the module B1 (as shown by the mark B1-14), one of the output ends of the module C1 (as shown by the mark C1-14) and one of the output ends of the module D1 (as shown by the mark D1-5), wherein the module C1 and the module D1 are respectively one of the second switch modules 320 under the radio frequency switch paths numbered C and D. In order to facilitate the design and reduce the cost, the first switch module 310, the second switch module 320 and the third switch module 330 all adopt the same type of radio frequency switch integrated circuit. Specifically, the type of the radio frequency switch integrated circuit is QPC6044.
[0042] The radio frequency calibration comprehensive test system comprises a comprehensive tester 100 and two wideband matrix radio frequency switches 300, wherein the comprehensive tester 100 has 8 output ends numbered #1~#8, the number of the input ports of the wideband matrix radio frequency switch 300 is 4, and the number of the output ports of the wideband matrix radio frequency switch 300 is 16. In this way, the 8 output ends of the comprehensive tester 100 can be expanded into 32 output ends numbered #1~#32. The host computer 400 is connected with the comprehensive tester 100 and the two wideband matrix radio frequency switches 300 through USB ports respectively, so as to control the test. The host computer 400 controls the wideband matrix radio frequency switch 300 to switch the test ports numbered #1~#32 to the test ports of the comprehensive tester 100 in turn, and at the same time, the host computer 400 cooperates with the calibration fixture 200 to calibrate the radio frequency line loss, and then the host computer 400 controls the comprehensive tester 100 to complete the test of the radio frequency parameters of the measured piece. Through system networking, 3 comprehensive testers 100 can be saved, which has obvious advantages in cost and machine space.
[0043] The embodiments of the utility model are described in detail above combined with the drawings, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range possessed by the ordinary skilled in the art without departing from the purpose of the utility model.
Claims
1. A radio frequency line loss calibration system, characterized by, The utility model relates to a kind of comprehensive testing apparatuses, calibration fixture and wideband matrix radio frequency switch, and the upper computer. Comprehensive testing apparatus; Calibration fixture, with multiple test cavities, the test cavities include at least one of short-circuit test cavity and open-circuit test cavity; One or more wideband matrix radio frequency switches, with multiple input ports, multiple output ports and multiple radio frequency switch paths, the number of output ports of the wideband matrix radio frequency switch is more than the number of input ports, each input port of the wideband matrix radio frequency switch is connected to the corresponding output port of the comprehensive testing apparatus respectively, the input end of each radio frequency switch path is connected to the corresponding input port, the output end of the multiple radio frequency switch paths is connected to the multiple output ports of the wideband matrix radio frequency switch, and the output port of the wideband matrix radio frequency switch is plugged into the multiple test cavities through a wire respectively. Upper computer, connected to the comprehensive testing apparatus and the wideband matrix radio frequency switch respectively.
2. The radio frequency line loss calibration system of claim 1, wherein, The calibration fixture includes a bottom plate and a test plate, a plurality of short-circuit probes are arranged on the bottom plate, and a short-circuit test cavity adapted to the short-circuit probes is arranged on the test plate, and the short-circuit probes are located in the short-circuit test cavity.
3. The radio frequency line loss calibration system of claim 1, wherein, The calibration fixture includes a bottom plate and a test plate, the test plate is installed on the bottom plate, and a plurality of open-circuit test cavities are arranged on the test plate.
4. The radio frequency line loss calibration system of claim 1, wherein, The calibration fixture includes a bottom plate and a test plate, a plurality of short-circuit probes are arranged on the bottom plate, and a short-circuit test cavity and an open-circuit test cavity are arranged on the test plate, the short-circuit test cavity is adapted to the short-circuit probes, and the short-circuit probes are located in the short-circuit test cavity.
5. The radio frequency line loss calibration system of any of claims 1 to 4, wherein, The wire includes a first loop line and a second loop line, and the first loop line and the second loop line are disconnected from each other.
6. The radio frequency line loss calibration system of claim 5, wherein, The ends of the first loop line and the second loop line are flush, or the ends of the first loop line and the second loop line are connected to a loop interface.
7. The radio frequency line loss calibration system of claim 1, wherein, The radio frequency switch path includes a first switch module, a second switch module and a third switch module, the input end of each first switch module is connected to an input port, the output end of each first switch module is connected to the input end of a plurality of second switch modules in cascade, the output end of each third switch module is connected to an output port, and the input end of each third switch module is connected to the output end of a plurality of second switch modules in cascade.
8. The radio frequency line loss calibration system of claim 7, wherein, The number of second switch modules is 4.
9. The radio frequency line loss calibration system of claim 7 or 8, wherein, The first switch module, the second switch module and the third switch module all use the same type of radio frequency switch integrated circuit.
10. The radio frequency line loss calibration system of claim 1, wherein, The number of input ports of the wideband matrix radio frequency switch is 4, and the number of output ports of the wideband matrix radio frequency switch is 16.