A phase shifter and antenna

Abstract

The invention discloses a phase shifter and an antenna. Wherein, the phase shifter includes a first substrate and a second substrate oppositely arranged and at least one phase shifting unit, the phase shifting unit includes a microstrip line, a driving electrode, a liquid crystal layer and a first metal layer, and the microstrip line is located near the second substrate On one side of the first substrate, the first metal layer is located on the side of the first substrate close to the second substrate, the liquid crystal layer is located between the first substrate and the second substrate; the driving electrode is located on the side of the liquid crystal layer away from the first substrate, and the driving The electrodes are used to drive liquid crystal molecules in the liquid crystal layer to deflect, and the microstrip line includes a radio frequency signal receiving end for receiving radio frequency signals. The phase shifter and the antenna provided by the embodiment of the present invention separate the drive electrode for driving the deflection of the liquid crystal molecules and the microstrip line for transmitting the radio frequency signal, so that there is no need to set an isolation gap structure between the microstrip line and the radio frequency signal transmission line, thereby reducing the The insertion loss is reduced, and the phase shift performance of the phase shifter is improved.

Description

technical field [0001] Embodiments of the present invention relate to the field of communications technologies, and in particular, to a phase shifter and an antenna. Background technique [0002] Liquid crystal antenna is a new type of reconfigurable antenna system that combines traditional microstrip patch antenna and liquid crystal material. It combines liquid crystal and microstrip line to adjust the arrangement of liquid crystal, thereby realizing the adjustment of relative permittivity of liquid crystal. A liquid crystal phase shifter is formed, and the liquid crystal phase shifter is combined with a patch radiator to form a liquid crystal antenna structure that can perform electrical scanning. [0003] In the existing liquid crystal antenna, the microstrip line is used as the liquid crystal deflection electrode to drive the deflection of the liquid crystal molecules. There is an isolation gap structure between the feeding network and the microstrip line. The radio freq...

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Problems solved by technology

[0003] In the existing liquid crystal antenna, the microstrip line is used as the liquid crystal deflection electrode to drive the deflection of the liquid crystal molecules. There is an isolation gap structure between the feed network and the microstrip line, and the radio frequency signal on the feed network is transmitted to the microstrip line through coupling. To prevent crosstalk between the driving voltages on the microstrip lines in different phase shifters, but the isolation slot structure will introduce additional insertion loss and reduce the performance of the antenna

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