Antenna-feeder system and phase calibration method

Abstract

The invention provides an antenna-feeder system and a phase calibration method. The antenna-feeder system comprises a first phase shift network and a second phase shift network, wherein the first phase shift network and the second phase shift network comprise corresponding phase shift devices with the same number, the antenna-feeder system also comprises a first phase shift control module, a coupler module, a phase difference detection module and a second phase shift control module, the first phase shift control module is used for receiving phase change quantity control signals and regulates the phase shift quantity of the phase shift devices in the first phase shift network according to the phase change quantity control signals, the coupler module is used for coupling radio frequency signals of each path of phase shift devices passing through the first phase shift network and the second phase shift network, in addition, the radio frequency signals are sent to the phase difference detection module, the phase difference detection module is used for obtaining the phase difference of the phase shift devices with the corresponding relationship in the first phase shift network and the second phase shift network according to the phase value of the radio frequency signals and sending the phase difference to the second phase shift control module, and the second phase shift control module is used for regulating the phase shift quantity of the phase shift devices in the second phase shift network according to the phase difference.

Description

technical field [0001] The invention relates to signal calibration technology, in particular to an antenna feed system and a phase calibration method, and belongs to the technical field of communication. Background technique [0002] In mobile communication, the pitch angle of the antenna is an important parameter for network maintenance and optimization, and setting the pitch angle of the antenna reasonably is the basic guarantee for the quality of the entire mobile communication network. The adjustment of the elevation angle of the antenna beam can be realized by adjusting the relative phase of the feed signal on each array element. [0003] A dual-polarized antenna consists of two groups of radiating elements with mutually orthogonal polarization directions, and each group of radiating elements has the same array characteristics. Since the correlation between signals in different polarization directions is weak, a dual-polarization antenna can produce a better polarizati...

AI Technical Summary

Problems solved by technology

Since the radio frequency signals of the two polarized arrays of the dual-polarized antenna are transmitted through independent feed networks (power dividing network and phase-shifting network), the cable length error in the feeding network, the influence of the power dividing network and the shifting of the phase-shifting network Factors such as phase error cause the phases of the feed signals of the two polarized arrays to be inconsistent. In the above scheme, although the phase change of the signal phase is set at the phase shift control port to adjust the phase of the two polarized arrays, the two RF signals cannot be calibrated. The phase error generated by the independent feed network leads to inconsistent pitch angles of the antenna radiation pattern in the two polarization directions, and the problem of inconsistent electromagnetic wave coverage in the two polarization directions at the edge of the cell, which reduces the polarization diversity Effect

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