A phase shifter based on liquid crystal material

Abstract

The invention discloses a phase shifter based on liquid crystal material, in particular to a phase shifter based on liquid crystal material. The solution is to encapsulate the upper and lower layers of the phase shifter with glass plates, and pour liquid crystal into the middle. The thickness of the liquid crystal layer is reduced as much as possible without affecting the performance of the phase shifter through simulation calculations, and then the structure is sealed with glass glue to ensure The air tightness and uniformity of the liquid crystal layer. And the lower surface of the upper glass plate and the double-sided metal layer of the lower glass plate are patterned by photolithography. The new liquid crystal phase shifter structure proposed by the present invention solves the problems of too thick liquid crystal layer, difficult alignment, long response time and large loss, and also solves the packaging, power feeding and bias circuit of the liquid crystal phase shifter Difficult to coordinate issues.

Description

Technical field [0001] The invention relates to the field of antennas, in particular to a phase shifter based on liquid crystal materials. Background technique [0002] The development of modern communication technology has higher and higher requirements for phased array antennas, and as the core component of the phased array unit, the electrically-tuned phase shifter plays a vital role in the performance of the entire array. Currently, there is an urgent need for low-loss, miniaturized, and low-cost electrically-tuned phase shifters. [0003] Phase shifters can be divided into two categories: active and passive. Many active phase shifters are based on the interpolation of two orthogonal signals. They can exist in the radio frequency front end or the baseband of the transceiver. Although the active phase shifter has advantages such as small package, it introduces additional power consumption, which is not suitable for large-scale mobile equipment or automated equipment. [0004] ...

AI Technical Summary

Problems solved by technology

[0010] The present invention is aimed at the problems that the thickness of the liquid crystal layer is too thick, it is difficult to achieve alignment, and the response time is long, the loss is large, and the packaging, feeding and biasing circuits of the liquid crystal electric tuning phase shifter are difficult to coordinate. Liquid crystal phase shifter structure

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