Liquid crystal phase shifter, manufacturing method thereof and liquid crystal antenna
A manufacturing method and a technology of a phase shifter, which are applied to antennas, antenna arrays, loop antennas, etc., can solve problems such as difficulty in impedance matching of microstrip lines, and achieve the effects of reducing the difficulty of impedance matching, reducing inductive impedance, and reducing size
Active Publication Date: 2022-04-22
SHANGHAI TIANMA MICRO ELECTRONICS CO LTD
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[0004]
In view of this, the embodiment of the present invention provides a liquid crystal phase shifter and its manufacturing method, and a liquid crystal antenna, which simplifies the problem of difficult impedance matching of the microstrip line caused by the design of the microstrip line
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[0042] In order to better understand the technical solutions of the present invention, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0043] It should be clear that the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0044] Terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. As used in the embodiments of the present invention and the appended claims, the singular forms "a", "said" and "the" are also intended to include the plural forms unless the context clearly indicates otherwise.
[0045] It should be understood that the term "an...
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The embodiment of the invention provides a liquid crystal phase shifter, a manufacturing method thereof and a liquid crystal antenna, relates to the technical field of liquid crystal antennas, and solves the problem that microstrip line impedance matching is difficult due to microstrip line design. The liquid crystal phase shifter comprises a first substrate and a second substrate which are oppositely arranged, and the first substrate is located on the side, facing the signal emitting direction of the liquid crystal phase shifter, of the second substrate; the microstrip line is located on the side, facing the first substrate, of the second substrate and comprises a first transmission line and a second transmission line, the first transmission line and the second transmission line are spiral, and the first transmission line and the second transmission line are nested in the direction perpendicular to the plane where the second substrate is located. The spiral directions of radio frequency signal transmission in the first transmission line and the second transmission line are opposite; the grounding electrode is located on the side, facing the second substrate, of the first substrate, and the grounding electrode is overlapped with the first transmission line and the second transmission line in the direction perpendicular to the plane where the second substrate is located; and the liquid crystal is positioned between the microstrip line and the grounding electrode.
Description
【Technical field】 [0001] The invention relates to the technical field of liquid crystal antennas, in particular to a liquid crystal phase shifter, a manufacturing method thereof, and a liquid crystal antenna. 【Background technique】 [0002] With the gradual evolution of the communication system, the phase shifter has been more and more widely used. Take the liquid crystal phase shifter as an example. Rotating under the action of the electric field formed between them, the dielectric constant of the liquid crystal changes, thereby shifting the phase of the radio frequency signal transmitted in the liquid crystal phase shifter. [0003] In the prior art, in order to make the phase shift of the radio frequency signal more sufficient, such as figure 1 as shown, figure 1 It is a schematic diagram of the structure of the microstrip line in the prior art. The microstrip line 1' is usually designed as a spiral to increase its length. However, in this arrangement, the impedance of ...
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IPC IPC(8): H01P1/18H01P11/00H01Q3/36
CPCH01P1/18H01P1/184H01P11/00H01Q3/36H01Q3/44H01Q21/061H01Q1/38H01Q1/48H01Q7/00
Inventor 贾振宇席克瑞林柏全段勤肄秦锋
Owner SHANGHAI TIANMA MICRO ELECTRONICS CO LTD
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