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CN-121995088-A - Multi-degree-of-freedom ultra-wideband time domain radiation antenna testing device

CN121995088ACN 121995088 ACN121995088 ACN 121995088ACN-121995088-A

Abstract

The invention discloses a multi-degree-of-freedom ultra-wideband time domain radiation antenna testing device, and belongs to the technical field of antennas. The device comprises a base, a cylindrical framework, an azimuth rotating mechanism, a height lifting mechanism, a polarization adjusting mechanism and accessory equipment. The base is provided with universal wheels and leveling supporting legs, the cylindrical framework supports the azimuth rotating mechanism, precise adjustment of the azimuth angle of the antenna is achieved through gear transmission and a manual rocking handle, the height lifting mechanism utilizes racks and linkage rods to synchronously lift the antenna and lock the height, and the polarization adjusting mechanism adjusts the polarization direction of the antenna through the I-shaped fixing seat and the rotating assembly and adapts to various antenna types. The invention integrates the azimuth, height and polarization multi-degree-of-freedom adjusting functions, can efficiently and conveniently realize ultra-wideband radiation antenna time domain pattern test, cross polarization level test and the like under the condition that the position of a measuring sensor is unchanged, obviously improves the test efficiency, adapts to test sites with different flatness, and is convenient to erect and remove and retract in emergency.

Inventors

  • WANG BINWEN
  • LIU QILONG
  • CHEN YUQING
  • CAI HAO
  • ZHANG TENGHAO
  • JIA HAO

Assignees

  • 中国人民解放军63660部队

Dates

Publication Date
20260508
Application Date
20260214

Claims (10)

  1. 1. The multi-degree-of-freedom ultra-wideband time domain radiation antenna testing device is characterized by comprising a base (1), a cylindrical framework (2), an azimuth rotating mechanism (3), a height lifting mechanism (4), a polarization adjusting mechanism (6) and auxiliary equipment (7); the base (1) is of a circular or polygonal structure, a cross beam (12) is arranged in the base, and a universal wheel (13) with a brake and a manual rotation leveling supporting leg (14) are arranged at the bottom of the base and used for moving and horizontally adjusting the device; the cylindrical framework (2) is of a polygonal column structure and is fixed above the base (1), and a supporting cross beam (22) and an inclined beam (23) are arranged in the cylindrical framework; The azimuth rotating mechanism (3) comprises a bearing end cover (31) fixed on the top of the cylindrical framework (2), an azimuth bearing (32) arranged in the bearing end cover (31), a gear (33) connected with the inner ring of the azimuth bearing (32), a rotating frame (34) fixed above the gear (33), a screw (35) meshed with the gear (33), an azimuth rotating manual rocking handle (36) connected with the screw (35) and an azimuth locking structure (37) and is used for driving and locking the rotating frame (34) to rotate in azimuth; The height lifting mechanism (4) comprises a support frame (41) fixed on the rotating frame (34), a sliding rail (42) arranged in a supporting column of the support frame (41), a rack (43) embedded in one side of the support frame (41), gears meshed with the rack (43), a height lifting manual rocking handle (48) for connecting the gears, sliding blocks (45) connected with two ends of the rack (43), a linkage rod (47) arranged on the other side of the support frame (41), a connecting rod (46) for connecting the rack (43) and the linkage rod (47) and a locking pin (49), wherein the rack (43) and the linkage rod (47) slide along the sliding rail (42) through the sliding blocks (45) so as to realize height lifting and locking of the antenna; The polarization adjustment mechanism (6) comprises an I-shaped fixing seat (61), a radiation unit clamp, a polarization adjustment manual rotation structure (68) and a polarization locking structure (69), wherein the I-shaped fixing seat (61) is fixed on a sliding block (45) of the height lifting mechanism (4), a bearing is arranged at the corner point of the I-shaped fixing seat, the radiation unit clamp is used for fixing an antenna (63) and a signal source box (64), the polarization adjustment manual rotation structure (68) is used for driving the radiation unit to rotate so as to adjust the polarization direction, and the polarization locking structure (69) is used for locking the polarization direction; The accessory device (7) comprises a laser range finder arranged outside the support frame (41).
  2. 2. The multi-degree-of-freedom ultra-wideband time domain radiation antenna testing device according to claim 1, wherein the number of the universal wheels (13) is not less than three, the number of the manual rotation leveling supporting legs (14) is not less than three, and the universal wheels (13) and the manual rotation leveling supporting legs (14) are uniformly and alternately arranged at the bottom of the base (1).
  3. 3. The multi-degree-of-freedom ultra-wideband time domain radiation antenna testing apparatus of claim 1, wherein the number of the columns (21) of the cylindrical skeleton (2) is not less than three, and the exterior thereof can be set as a closed structure.
  4. 4. The multi-degree-of-freedom ultra-wideband time domain radiation antenna testing device according to claim 1, wherein the outer shape of the bearing end cover (31) is matched with the cross section shape of the cylindrical framework (2), the rotating frame (34) is disc-shaped, the outer diameter of the rotating frame is not smaller than the outer diameter of the gear (33), and azimuth scale marks (38) are arranged on the periphery of the rotating frame (34) above the bearing end cover (31).
  5. 5. The multi-degree-of-freedom ultra-wideband time domain radiation antenna testing device according to claim 1, wherein the support frame (41) is in a flat quadrangular prism shape, a cross beam (50) and an oblique beam are arranged in the support frame, and a space for arranging a polarization adjustment mechanism (6) is reserved between two support columns on one side of a short side of the support frame (41).
  6. 6. The multi-degree-of-freedom ultra-wideband time domain radiation antenna testing apparatus according to claim 1 or 5, wherein the length of the rack (43) is larger than the space height required by the polarization adjustment mechanism (6), and a height scale (51) is arranged outside the support frame (41) where the rack (43) is located.
  7. 7. The multiple degree of freedom ultra wideband time domain radiation antenna testing apparatus of claim 1, wherein the number of the connecting rods (46) is plural, or a cross beam and an oblique beam are added to ensure the fastening connection of the rack (43) and the linkage rod (47).
  8. 8. The multi-degree-of-freedom ultra-wideband time domain radiation antenna testing device according to claim 1, wherein radiation units or balancing weights can be placed on two sides of the I-shaped fixing seat (61), the radiation unit clamp comprises an antenna clamp (66) used for fixing an antenna (63) and a signal source box fixing structure used for fixing a signal source box (64), and a contact part of the antenna clamp (66) and the antenna (63) is made of non-metal materials.
  9. 9. The multi-degree-of-freedom ultra-wideband time domain radiation antenna testing apparatus of claim 1, wherein said polarization adjustment manual rotation structure (68) is disc-shaped, and the center of the disc is coaxial with the center of the bearing inner ring at the corner of the i-shaped fixing seat (61).
  10. 10. The multiple degree of freedom ultra wideband time domain radiating antenna testing apparatus of claim 1 wherein the azimuth lock structure (37) and the polarization lock structure (69) are both locating pins.

Description

Multi-degree-of-freedom ultra-wideband time domain radiation antenna testing device Technical Field The invention belongs to the technical field of antenna testing, and particularly relates to a multi-degree-of-freedom adjusting device for testing characteristics of an ultra-wideband time domain radiation antenna. Background The radiation characteristics of the ultra-wideband time-domain radiation antenna mainly comprise a main shaft far-zone radiation field waveform, a time-domain directional diagram and the like. In general, the radiation characteristics of the ultra-wideband time-domain radiation antenna are tested in an open field, and the antenna is elevated by a certain height to avoid ground reflection during testing. In the existing test process, a simple supporting structure is often adopted to fix the ultra-wideband radiation antenna, a measuring system is arranged in a radiation far zone of the ultra-wideband time domain radiation antenna, when only the radiation field of the far zone of the antenna main shaft is tested, the measuring system is elevated to the same height as the radiation antenna, and the measuring system and the radiation antenna are aligned, namely, the mode completely meets the test requirement when the radiation field of the far zone of the antenna main shaft is tested. However, if the radiation field waveforms of the antenna in different angle directions are tested, the measuring system needs to be moved left and right or lifted up and down, which requires the auxiliary facilities of the measuring system, namely the measuring bracket, to have the functions of moving and lifting up and down, but the height range of the lifting of the measuring system is limited because the ground reflection needs to be avoided, and if the cross polarization level of the ultra-wideband time domain radiation antenna is measured, the polarization mode of the measuring sensor needs to be changed and the measuring sensor needs to be re-fixed, and in the process, the measuring point position can shift with great probability due to the movement of the measuring bracket, the re-fixation of the measuring sensor, and the like. Rechecking the position of the measuring point can obviously increase the test duration and reduce the test efficiency, and if the position of the measuring point is not checked, the accuracy of the test result can be affected. In addition, the excitation source of part of ultra-wideband time domain radiation antenna has poor stability and poor consistency, and too long test time can lead to inaccurate test results of time domain patterns and the like. In addition, when researching the near-ground propagation problem of ultra-wideband electromagnetic pulse, the antenna needs to be flexibly elevated to different heights, and when testing the field with poor flatness, the field cleaning and other works need to be carried out before the test. In summary, the existing ultra-wideband time-domain radiation antenna radiation characteristic measurement method and process have the problems of large test workload, low test efficiency, inaccurate test results, high requirements on the field and the like, and if a fixed measurement system is not moved, the antenna is lifted, polarized adjusted, rotated in azimuth, leveled, measured and the like at the fixed point position through the antenna test bracket, so that the radiation characteristic test efficiency of the ultra-wideband time-domain radiation antenna can be remarkably improved. Therefore, the ultra-wideband time-domain radiation antenna testing device with multiple degrees of freedom needs to be researched and designed, the antenna radiation characteristic testing requirement is met, and the ultra-wideband time-domain antenna testing process is standardized. Disclosure of Invention First, the technical problem to be solved The invention aims to solve the technical problems that in the existing ultra-wideband time domain radiation antenna test technology, a measuring point is easy to deviate, the test efficiency is low, the requirement on the flatness of a test field is high and multi-angle multi-polarization test is difficult to complete rapidly due to the fact that a measurement system needs to be moved. (II) technical scheme In order to solve the problems, the invention provides a multi-degree-of-freedom ultra-wideband time domain radiation antenna testing device integrating azimuth rotation, elevation, polarization adjustment, mobile leveling and ranging functions, and the core thought is to organically integrate all functional mechanisms through a modularized design, so that the antenna is subjected to multi-dimensional accurate adjustment under the condition that the position of a fixed measurement system is unchanged, the testing efficiency and accuracy are improved, and different testing scenes are adapted. The specific technical scheme is as follows: The testing device specifically comprises a base 1, a cylindrical framework