Phase shifter, manufacturing method thereof and antenna

Abstract

The embodiment of the invention provides a phase shifter, a manufacturing method thereof and an antenna, relates to the technical field of liquid crystal antennas, and aims to realize box thickness test and optical judgment of the phase shifter and improve the yield. The phase shifter comprises a first substrate and a second substrate which are oppositely arranged; a grounding electrode arranged on one side, facing the second substrate, of the first substrate; a transmission electrode arranged on the side, facing the first substrate, of the second substrate, wherein the transmission electrode and the grounding electrode are overlapped in the direction perpendicular to the plane where the second substrate is located; and liquid crystal which fills the space between the first substrate and the second substrate, wherein the grounding electrode is provided with a detection hollow-out part, and at least part of the detection hollow-out part is not overlapped with the transmission electrode in the direction perpendicular to the plane where the second substrate is located.

Description

【Technical field】 [0001] The invention relates to the technical field of liquid crystal antennas, in particular to a phase shifter, a manufacturing method thereof, and an antenna. 【Background technique】 [0002] With the gradual evolution of the communication system, the phase shifter has been more and more widely used. Taking the liquid crystal phase shifter as an example, the liquid crystal phase shifter changes the dielectric constant of the liquid crystal by controlling the rotation of the liquid crystal, so as to realize the The RF signal transmitted in the liquid crystal phase shifter is phase shifted. [0003] In the prior art, the ground electrode in the liquid crystal phase shifter covers a large area. Therefore, in the manufacturing process of the liquid crystal phase shifter, after the two substrates are paired to form a liquid crystal cell, no light can pass through the liquid crystal cell, so it cannot Carry out cell thickness testing and optical judgment on th...

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Problems solved by technology

[0003] In the prior art, the ground electrode in the liquid crystal phase shifter covers a large area. Therefore, in the manufacturing process of the liquid crystal phase shifter, after the two substrates are paired to form a liquid crystal cell, no light can pass through the liquid crystal cell, so it cannot Carry out cell thickness testing and optical judgment on the liquid crystal phase shifter, and then the liquid crystal phase shifter with reduced function or function failure may be applied to the antenna, which will not only lead to waste of cost in the subsequent module manufacturing process, but also seriously affect the radiation of the antenna performance

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