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High-sensitivity millimeter wave metasurface sensor based on liquid crystal dual mechanism

A metasurface and sensor technology, applied in the direction of instruments, alarms, electrical components, etc., can solve problems such as inability to work in the millimeter wave frequency band, and achieve the effects of small error, high sensitivity, and low profile

Active Publication Date: 2020-10-13
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, most sensors only respond to one external condition, and cannot work in the mmWave frequency band

Method used

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  • High-sensitivity millimeter wave metasurface sensor based on liquid crystal dual mechanism
  • High-sensitivity millimeter wave metasurface sensor based on liquid crystal dual mechanism
  • High-sensitivity millimeter wave metasurface sensor based on liquid crystal dual mechanism

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Embodiment Construction

[0020] The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings.

[0021] The working principle of the metasurface sensor designed in the present invention is to use the liquid crystal's unique response to the sensitive change of the dielectric constant of the two external conditions of electricity and temperature, and it can be applied in the millimeter wave frequency band to realize the dual detection of the external temperature and electricity. inductive sensor. When the metasurface sensor senses the increase of the external temperature, the dielectric constant of the liquid crystal decreases rapidly and linearly, and it works. Similarly, when the metasurface sensor senses the change of the external voltage, the dielectric constant of the liquid crystal changes linearly with the voltage. The change of the electric constant will move the resonance point of the high-quality factor Q value of the metasurf...

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Abstract

The invention discloses a high-sensitivity millimeter wave metasurface sensor based on a liquid crystal dual mechanism. The high-sensitivity millimeter wave metasurface sensor is formed by arranging m* n metasurface units according to a certain periodic structure. The metasurface unit comprises an upper-layer glass dielectric substrate, a metal strip-shaped rectangular structure and a bias circuit module which are etched on the lower surface of the upper-layer glass dielectric substrate, liquid crystals, a metal ground etched on the upper surface of a lower-layer glass dielectric substrate, and the lower-layer glass dielectric substrate. Resonance can be generated to a certain frequency point through each metal strip-shaped rectangular structure, and the resonance has a high Q value and is extremely sensitive to a dielectric constant caused by liquid crystal. The liquid crystal has an induction effect on temperature and electricity. Therefore, whether an instrument leaks electricity or not or whether a fire occurs or not can be detected. The sensor has double mechanisms, and is low in cost, high in sensitivity, low in profile and simple in design.

Description

technical field [0001] The invention relates to a novel artificial electromagnetic material technology, in particular to a liquid crystal dual-mechanism high-sensitivity millimeter-wave metasurface sensor. Background technique [0002] Metasurfaces are two-dimensional metamaterials with subwavelength structures arranged periodically. They are highly self-designable and can realize many functions or strange phenomena that cannot be realized in nature. The currently known metasurfaces can realize negative refraction, perfect wave absorption, asymmetric transmission, break non-reciprocity, and other functions that cannot be realized in nature. Metasurfaces are gradually changing from laboratory research to engineering applications. [0003] The sensor is an indispensable device in the field of artificial intelligence. It is similar to the human photosensitive organ, which can sense the measured information and convert the information into electrical signals or other informatio...

Claims

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Application Information

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IPC IPC(8): H01Q15/00G08B19/00
CPCG08B19/00H01Q15/0026H01Q15/0086
Inventor 蒋卫祥王强沈海洋崔铁军
Owner SOUTHEAST UNIV
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