Liquid crystal phase shifting unit, a manufacturing method thereof, a liquid crystal phase shifting device and an antenna

Abstract

The embodiment of the invention provides a liquid crystal phase shifting unit, a manufacturing method thereof, a liquid crystal phase shifting device and an antenna and relates to the technical fieldof phase shifting. A liquid crystal filling area is stably supported through a supporting structure; the uniformity of box thickness is improved, and the transmission stability of microwave signals isimproved. The liquid crystal phase shifting unit includes a first substrate, a second substrate, microstrip lines, a supporting structure and liquid crystal molecules; the first substrate and the second substrate are arranged opposite to each other, and areas between the first substrate and the second substrate include the liquid crystal filling area; the microstrip lines are arranged on the surface, facing the second substrate, of the first substrate, and the orthographic projection of the microstrip lines on the first substrate is positioned in the liquid crystal filling area; the supporting structure is arranged between the first substrate and the second substrate and positioned in the liquid crystal filling area, and the orthographic projection of the supporting structure on the firstsubstrate is not overlapped with the microstrip lines; the liquid crystal filling area is filled with the liquid crystal molecules. The liquid crystal phase shifting unit is used for conducting phaseshifting on microwave signals.

Description

【Technical field】 [0001] The invention relates to the technical field of phase shifting, in particular to a liquid crystal phase shifting unit and a manufacturing method thereof, a liquid crystal phase shifter and an antenna. 【Background technique】 [0002] A phase shifter is a device that can adjust the phase of a wave. It is widely used in radar, accelerator, communication, instrumentation, and even music. Currently, the most widely used phase shifter is a liquid crystal phase shifter. [0003] The liquid crystal phase shifter includes multiple liquid crystal phase shifting units, such as figure 1 as shown, figure 1 It is a structural schematic diagram of a liquid crystal phase shifting unit in the prior art. The liquid crystal phase shifting unit includes a first rigid substrate 1', a second rigid substrate 2' and a third rigid substrate 3' which are oppositely arranged, wherein the first rigid substrate 1' There is a microstrip slot 4' for arranging microstrip lines, t...

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Problems solved by technology

[0004] Because the cell thickness of the current liquid crystal phase shifting unit is relatively large, which can reach hundreds of microns, and based on the structure of the existing liquid crystal phase shifting unit, on the one hand, when the liquid crystal tank 5' is set in the second rigid substrate 2', There will inevitably be process errors, resulting in uneven thickness of the liquid crystal tank 5', which in turn leads to poor cell thickness uniformity and large fluctuations in the filling volume of liquid crystal molecules; on the other hand, this structure cannot realize the liquid crystal tank 5'. The corresponding area is effectively supported, which further leads to the problem of uneven box thickness

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