A liquid crystal phase shifter and its manufacturing method, liquid crystal phase shifter and antenna

Abstract

Embodiments of the present invention provide a liquid crystal phase shifting unit and a manufacturing method thereof, a liquid crystal phase shifter, and an antenna, which relate to the field of phase shifting technology. A support structure is used to achieve stable support for the liquid crystal filling area, which improves the uniformity of the cell thickness, and improves The transmission stability of the microwave signal is improved. The liquid crystal phase shifting unit includes: a first substrate and a second substrate oppositely arranged, and the area between the first substrate and the second substrate includes a liquid crystal filling area; a microstrip line, and the microstrip line is arranged on the first substrate towards the second substrate. On the surface, the orthographic projection of the microstrip line on the first substrate is located in the liquid crystal filling area; the supporting structure, the supporting structure is arranged between the first substrate and the second substrate, the supporting structure is located in the liquid crystal filling area, and the supporting structure is in the first The orthographic projection on the substrate does not overlap with the microstrip line; the liquid crystal molecules are filled in the liquid crystal filling area. The liquid crystal phase shifting unit is used for phase shifting the microwave signal.

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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