Liquid crystal phase shifter based on vector orthogonal method and regulation and control method

Abstract

The invention discloses a liquid crystal phase shifter based on a vector orthogonal method and a regulation and control method. The method is applied to the field of communication, and aims to solve the problems that the insertion loss and the size of a traditional liquid crystal microwave phase shifter are difficult to reduce, and the traditional liquid crystal microwave phase shifter is not suitable for high-gain and high-integration-level array antennas. The liquid crystal phase shifter comprises a power divider, four phase shifters, a coplanar waveguide coupling microstrip structure and a coplanar waveguide delay line. A microwave signal is divided into two paths of coherent electromagnetic signals with the same amplitude through a power divider, the two paths of electromagnetic signals enter four phase shifting units from a coplanar waveguide in an up-down coupling mode, delay lines with different lengths are loaded at a second port and a third port, and when the length difference of the two delay lines is 1 / 4 wavelength, orthogonal signals with adjustable amplitude ratios are formed, the orthogonal signals are synthesized and then are output. According to the method, the disadvantages of large phase shifting unit area and large insertion loss of a traditional phase shifting module are avoided, the device performance is enhanced, and the integration level and the area utilization rate of a system are improved.

Description

technical field [0001] The invention belongs to the technical field of communication, in particular to a liquid crystal phase shifter technology based on a vector orthogonal method. Background technique [0002] The rapid development of society has brought about the rapid growth of information flow. Communication in modern society is inseparable from antennas. The microwave phase shifter is the core component of the antenna, which can change the phase change of the electromagnetic wave. Compared with ferrite and digital phase shifters, liquid crystal phase shifters have the advantages of low cost, low loss, and low power consumption; the overall weight is light and miniaturized, so the entire system has high integration and strong portability , easy to control. [0003] Broadband, large capacity, high efficiency, multi-function, low cost, and miniaturization of antennas are the development trend in the field of wireless communication, and also the improvement of social ne...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above-mentioned technical problems, the present invention proposes a liquid crystal phase shifter and a control method based on the vector orthogonal method, which can effectively solve the problems of large insertion loss and low integration of traditional liquid crystal phase shifters

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