A phase shifter and antenna

Abstract

The embodiment of the invention provides a phase shifter and an antenna, and relates to the field of communication. The phase position of a signal cannot be changed due to relative motion between a sliding strip line and a fixed strip line, so that the effect of the phase shifter is improved. The phase shifter comprises an input port, a fixed strip line, a sliding strip line, at least one phase-shifting branch and a compensating medium, wherein each phase-shifting branch is connected with two first output ports; the compensating medium is partially overlapped with the sliding strip line when the sliding strip line slides relative to the fixed strip line, and is used for changing the effective dielectric constant of the sliding strip line partially overlapped with the compensating medium; when the sliding strip line slides relative to the fixed strip line along a first direction or a second direction, the first phase shifting of the signal and the second phase shifting of the signal are equal in magnitude and are opposite in phase positions.

Description

technical field [0001] The invention relates to the communication field, in particular to a phase shifter and an antenna. Background technique [0002] In a communication system, an antenna is an array composed of a certain number of antenna elements. In practical applications, in order to optimize the coverage of wireless signals in a cell, the maximum radiation direction of the antenna needs to be changed according to the demand. The method of the maximum radiation direction is to change the phase of the electromagnetic wave fed to each antenna unit in the antenna array, so that there is a certain phase difference between the antenna units in the array. The device that realizes the phase change of this electromagnetic wave is a phase shifter. Existing phase shifters are mainly divided into two types: the first type achieves phase shifting by changing the effective dielectric constant of the signal transmission path; the second type achieves phase shifting by changing the l...

AI Technical Summary

Problems solved by technology

When some phase shifters (such as linear phase shifters) slide the main feeder, the length of the main feeder changes, and the distance that the signal propagates in the main feeder also changes, so the signal is phase shifted in the main feeder , thus affecting the effect of the phase shifter

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