Novel positioning rotating table used for OTA testing

Abstract

The invention relates to a novel positioning rotating table used for OTA testing. The rotating table consists of a three-axis displacement platform, a polarization rotating table, a base, a servo unitand a control unit. The three-axis displacement platform comprises an X axis, a Y axis and a Z axis, and is used to realize translational positioning of an antenna to be tested along the X direction,the Y direction, the Z direction. A polarization rotating table can be used to realize that equipment to be tested is moved to a designated coordinate in a spherical coordinate, and mainly compriseshorizontal polarization and vertical polarization. According to the invention, the testing and positioning of the radiation characteristic and the receiving characteristic of the antenna sheet of theequipment to be tested can be realized through the linkage of the high precision rotating table, a conical gear set and a connecting rod. By ordered horizontal rotation and vertical rotation, the polarization center of the antenna is adjusted to a limited space position, thereby improving the comprehensive testing capability of the antenna testing rotating table. The reliability of the testing data is improved by high precision positioning, and at the same time, a built-in transmission structure is capable of guaranteeing that the equipment is more concise and attractive.

Description

technical field [0001] The patent of the invention belongs to the field of microwave communication measurement technology, and is a new type of positioning turntable for OTA testing. Background technique [0002] Radio antennas are an essential component of radio systems, providing the conversion from guided waves on transmission lines to "free space" waves. With the rapid development of science and technology, antennas play an increasingly important role in many fields such as mobile communications, broadcasting, urban radio, remote sensing and industrial applications. In order to improve the performance of radio systems, it is necessary to improve the technical indicators of antennas . The design of antennas with high specification requirements not only requires mastering modern antenna design theory and design methods, but also requires advanced testing equipment and testing methods to carry out theoretical verification or performance index testing of the designed antenn...

AI Technical Summary

Problems solved by technology

For the traditional belt-driven OTA test turntable, due to structural reasons, the cable layout is complicated, the test function is single, and one operation can only test the data of one test point. During the entire test cycle, it is necessary to manually adjust and switch the antenna position to test the next set of parameters. , making the operation complicated and time-consuming

At the same time, manual intervention and the aging of the timing belt make the positioning accuracy low, which cannot meet the needs of automated testing, and cannot realize automatic monitoring, automatic statistics, and performance optimization and upgrades. It is increasingly unable to meet the requirements of antenna technical index testing.

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