CN-121978421-A - Movable stationary phase center air interface test turntable structure

CN121978421ACN 121978421 ACN121978421 ACN 121978421ACN-121978421-A

Abstract

The invention discloses a movable fixed-phase center hollow test turntable structure which comprises a rotary base, a deflection adjusting part, a first movement adjusting part and a second movement adjusting part, wherein the rotary base can be moved, the deflection adjusting part comprises a deflection table, the swinging center of the deflection table forms the center of a turntable, the first movement adjusting part and the second movement adjusting part are arranged on the deflection table, a tested device is connected to the first movement adjusting part or the second movement adjusting part, the first movement adjusting part and the second movement adjusting part are used for driving the tested device to move along the horizontal direction and the vertical direction respectively, and the phase center of the tested device is overlapped with the center of the turntable by adjusting the first movement adjusting part and the second movement adjusting part. The invention adopts the deflection adjusting part swinging around the horizontal axis as the main rotating part and is assisted with the first moving adjusting part and the second moving adjusting part which can respectively move along the horizontal direction and the vertical direction, thereby realizing flexible adjustment of the tested equipment in the three-dimensional space.

Inventors

MA ZHIGUO
JIN HONGJI
CHEN LEI
ZHANG XIANG
JIN JIAN
LIAN CHANGLIANG
WANG YUKUN
HAO YULIN
JI HONGYAN
ZHENG YI
YU TIANQI
WANG XU

Assignees

博鼎实华(北京)技术有限公司

Dates

Publication Date: 20260505
Application Date: 20251226

Claims (10)

1. The movable type fixed-phase-center hollow test turntable structure is characterized by comprising a rotary base, a deflection adjusting part, a first movement adjusting part and a second movement adjusting part, wherein the rotary base is movably arranged, the deflection adjusting part comprises a deflection table which is arranged on the rotary base and can swing around a horizontal axis, the swinging center of the deflection table forms a turntable center, the first movement adjusting part and the second movement adjusting part are arranged on the deflection table, the first movement adjusting part or the second movement adjusting part is connected with tested equipment, and the first movement adjusting part and the second movement adjusting part are used for driving the tested equipment to move along the horizontal direction and the vertical direction respectively, and the phase center of the tested equipment is overlapped with the turntable center by adjusting the first movement adjusting part and the second movement adjusting part.
2. The movable stationary phase center empty test turntable structure according to claim 1, wherein a deflection circular arc top surface is provided on the top surface of the rotating base, a deflection circular arc bottom surface is provided on the bottom surface of the deflection table, and the centers of the deflection circular arc top surface and the deflection circular arc bottom surface are both located on a horizontal axis passing through the center of the turntable.
3. The movable type fixed phase center air interface testing turntable structure according to claim 2, wherein a deflection guide rail is arranged on the side wall of the rotary base, the deflection guide rail is arranged in a circular arc shape, the circle center of the deflection guide rail is positioned on a horizontal axis passing through the center of the turntable, and a deflection sliding block capable of moving along the deflection guide rail is arranged on the side wall of the deflection table.
4. The movable stationary phase center air interface test turret structure of claim 2, wherein a rotary drive is coupled to the yaw deck, the rotary drive driving the yaw deck to oscillate about the horizontal axis.
5. The movable stationary phase center air interface test turret structure of claim 1, wherein the first movement adjustment portion includes a first support, a first moving platform and a first movement driving portion, the first support is disposed above the yaw deck, the first moving platform is disposed above the first support and is connected to the first movement driving portion, and the first moving platform is driven by the first movement driving portion to move in a horizontal direction.
6. The movable stationary phase center hollow test turntable structure according to claim 5, wherein the first moving driving part comprises a first screw rod, a first sliding block and a rotating handle, the first screw rod is hinged in the first support along the horizontal direction, the first sliding block is fixedly sleeved on the first screw rod in the circumferential direction, the first moving platform is connected above the first sliding block, one end of the first screw rod is connected with the rotating handle, and the rotating handle drives the first screw rod to rotate so as to drive the first sliding block and the first moving platform to move along the horizontal direction.
7. The movable stationary phase center air interface test turret structure of claim 5, wherein the first support is provided with a first rail in a horizontal direction, and the first moving platform moves along the first rail.
8. The movable stationary phase center air interface test turntable structure according to claim 1, wherein the second movement adjusting part comprises a second support, a second moving platform and a second movement driving part, the second support is arranged in a vertical structure and is arranged above the first movement adjusting part, the second support can move in a horizontal direction under the driving of the first movement adjusting part, the second moving platform is positioned on one side of the second support and is connected with the second movement driving part, and the second moving platform moves in a vertical direction under the driving of the second movement driving part.
9. The movable stationary phase center hollow test turntable structure according to claim 8, wherein the second moving driving part comprises a second screw rod, a second sliding block and a rotating motor, the second screw rod is hinged in the second support in the vertical direction, the second sliding block is fixedly sleeved on the second screw rod in the circumferential direction, one side of the second sliding block is connected with the second moving platform, one end of the second screw rod is connected with the rotating motor, the rotating motor drives the second screw rod to rotate so as to drive the second sliding block and the second moving platform to move in the vertical direction, and the second moving platform is supported and connected with the tested equipment.
10. The portable stationary phase center air interface test turret structure of claim 1, wherein a test structure support is provided on one side of the rotating base.

Description

Movable stationary phase center air interface test turntable structure Technical Field The invention relates to the technical field of antenna performance test, in particular to a movable fixed phase center air interface test turntable structure. Background With the rapid development of wireless communication technology, the requirements of mobile communication devices on antenna performance are continuously increasing. The traditional antenna test method mostly adopts a static test mode under the wired connection and no reflection environment, and can not truly restore the wireless signal receiving and transmitting condition of the equipment in actual use. In order to evaluate the wireless performance of the device more accurately, an OTA (Over-the-Air) test technique has been developed and becomes an important step in the wireless device authentication and optimization process. OTA testing is typically performed in a microwave darkroom, by simulating a real electromagnetic environment, measuring the transmission and reception performance of the device in different directions in three dimensions. The turntable is used as one of key components of the OTA test system and is used for precisely controlling the gesture (such as azimuth angle, pitch angle and the like) of the tested equipment, so that space channel scanning and data acquisition are realized. Currently mainstream OTA test turntable is driven by an electric motor or a servo motor, and angle adjustment is achieved through a single-shaft or multi-shaft rotating platform. However, existing turrets suffer from several disadvantages: 1. the mechanical structure is complex, and the multi-axis cooperative precision is not enough; 2. The dynamic performance is limited, and the high-frequency test requirement is difficult to meet; 3. when the turntable moves, the phase center cannot meet the test development condition; 4. the bearing capacity contradicts the accuracy. Currently, for OTA testing of base station type large-scale wireless communication devices, a U-shaped biaxial turntable structure is widely adopted, and the structure mainly comprises a horizontal azimuth axis and a vertical elevation axis. The Device Under Test (DUT) is generally fixedly mounted on a pitching axis, and the pitching axis is connected to two sides of an azimuth axis through a supporting structure, so that the device can be adjusted in any posture in the horizontal and vertical directions to meet the requirements of spherical coverage test. Although the U-turn table structure is widely used in OTA testing of base station type devices, the following problems still exist: 1. the structure is huge, the darkroom space is occupied, and particularly, when large equipment is tested, the whole turntable system has larger size, which is not beneficial to the high-efficiency utilization of the microwave darkroom; 2. The dynamic gesture adjustment efficiency is low, the inertia of the driving mechanism is large and the response speed is limited when the frequent switching angle test is performed; 3. the problem of cable winding or interference is that a feeder line or a control line connected with the DUT is easy to wind along with angle conversion, so that the stability and repeatability are affected; 4. the integration level and the expansibility are limited, namely the turntable control system and the test platform are often mutually independent, and the degree of automation is required to be improved; 5. In the existing U-shaped structure, because the rotation center of the turntable is not completely coincident with the phase center of electromagnetic radiation of the tested equipment, especially when multi-axis linkage or the testing equipment is large, the offset of the phase center in space causes measurement errors, and the requirements of high-precision OTA testing on space consistency and directivity consistency cannot be met. With the development of millimeter wave, high frequency communication and 5G technology, higher requirements are being put on the test frequency range, accuracy, reliability and test efficiency. Therefore, the inventor provides a movable fixed-phase central air interface test turntable structure by virtue of experience and practice of related industries for many years, so as to overcome the defects of the prior art. Disclosure of Invention The invention aims to provide a movable fixed-phase center air-interface testing turntable structure, which solves the problems of heavy structure, poor adaptability, phase center deviation and the like in the conventional U-shaped double-shaft turntable in the process of carrying out OTA (over-the-air) testing on large antenna products such as base station equipment and the like. The invention aims to achieve the movable stationary phase center hollow test turntable structure, which comprises a rotary base, a deflection adjusting part, a first movement adjusting part and a second movement adjusting part, wherein the r