Compact antenna feed calibration network

Abstract

The invention provides a compact antenna feed calibration network, and aims at providing the highly-versatile and reliable integrated feed calibration network used for antennas of a base station. According to the compact antenna feed calibration network, an upper-layer antenna metal floor (1) as a top layer is provided with a corresponding intermediate-layer antenna combiner feed network (2) and embedded grooves, combiner modules are embedded into the embedded grooves, the embedded grooves are arranged in a staggered manner at the same interval, combiners are connected antenna ports and ports corresponding to a lower-layer antenna calibration network (3) via four different model design modules, two combiners needed by dual polarization of every two unit subarrays serve as one module, and the modules are fastened and combined with the upper-layer antenna metal floor in a modularized installation way. the intermediate-layer antenna combiner feed network for connecting an antenna unit with the lower-layer antenna calibration network is formed, the lower-layer antenna calibration network is of a strip line structure, and 32 parallel coupling linear directional couplers (15) and a 1-to-32 power divider (14) are distributed in an H-shaped PCB of the lower-layer antenna calibration network.

Description

technical field [0001] The invention relates to a design of a comprehensive network for feed calibration with a compact structure. More specifically, the present invention relates to a feed network for a base station antenna and its underlying antenna calibration network. [0002] technical background [0003] The antenna is one of the key hardware devices of the mobile communication system. With the rapid development of mobile communication technology, the system is becoming more and more complex, and the requirements for antenna performance are getting higher and higher. With the continuous development of communication technology, mobile communication has entered the 4G-LTE era from the initial analog communication, and gradually entered the 5G era, and the mobile communication base station antenna has also evolved into a smart antenna form. Mobile base station antennas generally adopt the form of an array, and usually two units are used as its sub-array to reduce the num...

AI Technical Summary

Problems solved by technology

The current base station antenna calibration network mostly adopts an open type. Although the structure is simple and the installation is relatively convenient, its electrical performance is significantly affected by the electromagnetic environment inside the antenna, the anti-interference ability is relatively poor, and the space occupied is relatively large.

Although the general closed calibration network has strong anti-interference ability, it will cause crosstalk between the signals of each channel of the antenna, resulting in poor amplitude and phase consistency of the calibration network.

In order to solve the problem of mutual crosstalk between channels improved by the closed calibration network, the calibration network can improve its amplitude and phase consistency by adding a metal shielding box, but its processing and installation are relatively complicated and occupy a large space

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