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CN-122026042-A - With test functional circulator

CN122026042ACN 122026042 ACN122026042 ACN 122026042ACN-122026042-A

Abstract

The invention discloses a circulator with a test function, wherein a test cabin is arranged below a main radio frequency cabin, a test cavity is formed in the test cabin in a hollow design, an SPDT radio frequency switch and a load part are arranged in the test cavity, a test structure for testing is arranged in the test cavity in a vertically lifting manner, the test structure is provided with a plurality of shielding structures for electromagnetic shielding of an upper cabin body and a lower cabin body, an electric push rod for driving the test structure to move is also arranged in the test cavity, a non-signal main path test point is reserved in the PCB type central conductor, and the test cavity is matched with the lifting test structure in the test cabin, so that the in-situ test function of the circulator is realized, and the circulator is not required to be detached from a system during test, and the indexes such as insertion loss, standing wave ratio and the like can be detected only by connecting an external test instrument with a test port.

Inventors

  • ZHAO JIANXIN
  • ZHAO YUNLIANG
  • LIU MENGXING

Assignees

  • 南京金宁微波有限公司

Dates

Publication Date
20260512
Application Date
20260403

Claims (8)

  1. 1. The utility model provides a circulator with test function, its characterized in that includes main radio frequency cabin (1), main radio frequency cabin (1) inside cavity design forms radio frequency cavity (11), install ferrite core, PCB formula center conductor (5) in radio frequency cavity (11), be provided with test point (51) on PCB formula center conductor (5), the embedding has three evenly distributed's radio frequency connector (3) on main radio frequency cabin (1), still the embedding has test port (4) on main radio frequency cabin (1), three radio frequency connector (3) respectively with three terminal electric connection of PCB formula center conductor (5), test cabin (2) are installed to main radio frequency cabin (1) below, cavity design forms test chamber (21) in test chamber (2), install SPDT radio frequency switch (22) and load portion (23) in test chamber (21), test structure (6) that are used for carrying out the test with test point (51) of PCB formula center conductor (5) are installed to the oscilaltion, test structure (6) are used for installing in test structure (7) and are used for carrying out the test in the electromagnetic shield structure (8) under the test of PCB, test structure (7) are installed on test chamber (7).
  2. 2. A circulator with test function according to claim 1, characterized in that the common end of the SPDT radio frequency switch (22) is connected to the test port (4) by a microstrip line, one path of the SPDT radio frequency switch (22) is connected to the test structure (6), and the other path of the SPDT radio frequency switch (22) is connected to the load part (23).
  3. 3. The circulator with the test function according to claim 1, wherein three groups of evenly distributed penetrating openings are formed in the bottom end of the inside of the radio frequency cavity (11), and an insulating sleeve (12) is fixed in each penetrating opening; The test structure (6) comprises a lifting plate (62) with a Y-shaped structure, three groups of uniformly distributed test probes (61) are fixed on the lifting plate (62), each test probe (61) is located under an insulating sleeve (12), each test probe (61) is located under one corresponding test point (51), a pushing plate (63) is fixed below the lifting plate (62), lifting sliding grooves (64) are formed in the pushing plate (63), and the lifting sliding grooves (64) are in sliding connection with a push rod of an electric push rod (8).
  4. 4. A circulator with a test function according to claim 3, wherein a driving head (81) is fixed on a push rod of the electric push rod (8), the lifting chute (64) is arranged obliquely downwards, and the driving head (81) is in sliding connection in the lifting chute (64); A plurality of lifting ports are formed in the lifting plate (62), guide posts (621) are inserted in the lifting ports in a vertically sliding mode, and the upper end and the lower end of each guide post (621) are respectively fixed with the main radio frequency cabin (1) and the test cavity (21).
  5. 5. The circulator with the test function according to claim 4, wherein the shielding structure (7) comprises two groups of translation plates (71) which are slidably arranged below the main radio frequency cabin (1), the two groups of translation plates (71) are symmetrically distributed about the test probe (61), the translation plates (71) are in an inverted L-shaped structure, and a shielding head (711) is integrally formed at one end of the translation plates (71) close to the test probe (61); a driving groove (72) is formed in the translation plate (71), a linear roller (73) is rotatably mounted on the lifting plate (62) through a support, and the linear roller (73) is inserted in the driving groove (72) in a rolling mode.
  6. 6. The circulator with the test function according to claim 5, wherein the driving groove (72) comprises a vertically arranged disengaging groove (722), a horizontally moving groove (721) is formed in the lower end of the disengaging groove (722), and the distance between the bottom end of the horizontally moving groove (721) and the lifting plate (62) is smaller than the distance between the horizontally moving groove and is larger than the distance between the upper end of the horizontally moving groove (721) and the lifting plate (62).
  7. 7. The circulator with the test function according to claim 6, wherein a linear sliding groove (712) is formed in the upper surface of the translation plate (71), a linear sliding block (713) is slidably inserted in the linear sliding groove (712), and the linear sliding block (713) is fixed with the lower surface of the main radio frequency cabin (1) through a screw.
  8. 8. The circulator with the test function according to claim 7, wherein a linkage rod (82) is fixed on the side surface of a driving head (81) of the electric push rod (8) through a screw, an opening and closing chute (83) with a strip-shaped structure is formed in the linkage rod (82), and a deflector rod of the SPDT radio frequency switch (22) is arranged in the opening and closing chute (83) in a sliding mode.

Description

With test functional circulator Technical Field The invention relates to the field of circulators, in particular to a circulator with a test function. Background The circulator is used as a passive radio frequency device with unidirectional transmission characteristics, and has become a key core component in radio frequency systems such as a mobile communication base station, a phased array radar, a microwave communication module, satellite communication equipment and the like by virtue of the core advantages of low insertion loss and high isolation, and the performance stability of the circulator directly determines the communication quality and the operation reliability of the whole radio frequency link. The structural design of the traditional circulator is only focused on the realization of a core radio frequency function, and a built-in test channel and related mechanisms are not reserved. If the traditional circulator needs to detect core radio frequency indexes such as insertion loss, isolation, standing wave ratio and the like, the traditional circulator needs to be detached from a complete machine system and is connected with devices such as a vector network analyzer and the like through a special fixture for testing. The process is time-consuming and labor-consuming, the maintenance efficiency of the system is seriously affected, and the abrasion of the radio frequency interface of the circulator and the position deviation of core components (such as a central conductor and a ferrite core) can be caused by repeated disassembly and assembly, so that the performance stability of the device is affected, and even the permanent damage is caused. Disclosure of Invention The circulator with the test function solves the problems. In order to achieve the above purpose, the present invention adopts the following technical scheme: The circulator with the test function comprises a main radio frequency cabin, a radio frequency cavity is formed by hollow design in the inner part of the main radio frequency cabin, a ferrite core and a PCB type central conductor are arranged in the radio frequency cavity, a test point is arranged on the PCB type central conductor, the test point is a tiny bonding pad reserved when the PCB type central conductor is designed, and is positioned in a non-signal main path area of the PCB type central conductor, such as a conductor edge and a pin root, impedance matching transition is carried out between the bonding pad and a signal path of the PCB type central conductor, three groups of uniformly distributed radio frequency connectors are embedded in the main radio frequency cabin, test ports are also embedded in the main radio frequency cabin, the three radio frequency connectors are respectively and electrically connected with three tail ends of the PCB type central conductor, the radio frequency connectors and the test ports are all SMA interfaces, and an integrated structure in which the main radio frequency cabin and the test cabin are processed in a split mode and are integrally assembled is arranged below the main radio frequency cabin, and physical isolation and electromagnetic shielding are realized through a metal partition board and a conductive liner; The test cabin is installed to main radio frequency cabin below, the cavity design forms the test chamber in the test cabin, SPDT radio frequency switch and load portion are installed to the test intracavity, test structure that is used for carrying out the test with the test point contact of PCB type center conductor is installed to the lift-type in the test chamber, install a plurality of shielding structures that are used for upper and lower cabin body electromagnetic shield on the test structure, still install the electric putter that is used for driving test structure to remove in the test chamber. Preferably, the public end of the SPDT radio frequency switch is connected to the test port through a microstrip line, one path of the SPDT radio frequency switch is connected to the test structure, and the other path of the SPDT radio frequency switch is connected to the load part, wherein the load part is a miniature 50 ohm load. Preferably, three groups of evenly distributed penetrating openings are formed in the bottom end of the radio frequency cavity, an insulating sleeve is fixed in the penetrating openings, and the insulating sleeve adopts a ceramic guide sleeve to ensure the lifting verticality of the test probe; the test structure comprises a lifting plate with a Y-shaped structure, three groups of test probes which are uniformly distributed are fixed on the lifting plate, each test probe is positioned under an insulating sleeve, each test probe is positioned under one corresponding test point, the test probes adopt miniature and spring-loaded radio frequency coaxial ejector pins, under the test mode, the test probes can accurately rise and are in soft contact with a specific test point on a PCB type central conducto