Antenna structure, its driving method and communication device

Abstract

The invention discloses an antenna structure, a driving method thereof and a communication device, comprising a first substrate, a liquid crystal layer, a plurality of first electrodes and a plurality of second electrodes arranged on one side of the first substrate, the first The electrodes and the second electrodes are insulated from each other and arranged alternately, the liquid crystal layer is arranged on the first electrodes and the second electrodes, and the first electrodes and the second electrodes are used to control the orientation of liquid crystal molecules in the liquid crystal layer. The present invention can overcome the shortcomings of the alignment layer that has undergone photo-alignment or photopolymerization alignment process. The antenna structure provided by the embodiment of the present invention avoids the trouble of the rubbing alignment process for the alignment layer, and does not require any photo-alignment or photo-alignment of the alignment layer. The photopolymerization alignment process simplifies the process flow, greatly reduces the difficulty of the process, and also reduces the processing cost.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to an antenna structure, a driving method thereof, and a communication device. Background technique [0002] Liquid crystal metamaterial antennas can be used in a wide range of applications. Whether it is communication between vehicles and satellites, array radar for unmanned driving, or array radar for active safety protection, the anisotropy of liquid crystals can be used to achieve scanning functions. The liquid crystal metamaterial antenna is composed of a resonant unit. When the liquid crystal arrangement in the resonant unit changes, the resonant frequency will change. By controlling the liquid crystal at this place, the final antenna scanning function can be realized. Generally speaking, liquid crystals are aligned by controlling the required alignment direction of the liquid crystals, and the electrodes on the upper and lower substrates give electric fields in ...

AI Technical Summary

Problems solved by technology

[0003] Since the metal film thickness of microwave devices is much thicker than that used in displays, the rubbing process will encounter many difficulties in the production of liquid crystal antennas, while the photo-aligned alignment film is expensive and has low anchoring energy. poor reliability

The application scenarios of liquid crystal antennas will have a high and low temperature range of 80 degrees Celsius and minus 50 degrees Celsius. The alignment film after photoalignment is much weaker than the general alignment film, so it cannot adapt to such a severe temperature range.

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