Terahertz dynamic phase modulator based on microstructure

A dynamic phase and phase modulation technology, which is applied in the connection of antenna grounding switch structures, waveguide devices, electrical components, etc., can solve the problems of small size and undeveloped, and achieve high modulation speed, good application potential and prospects, and processing The effect of mature technology

Inactive Publication Date: 2020-11-13
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Application Information

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Problems solved by technology

As a new type of radar, terahertz radar has the characteristics of small size, high speed and large-scale inte

Method used

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  • Terahertz dynamic phase modulator based on microstructure
  • Terahertz dynamic phase modulator based on microstructure
  • Terahertz dynamic phase modulator based on microstructure

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[0029] The technical solution of the present invention will be described in detail below with reference to the drawings and embodiments.

[0030] The present invention provides a terahertz dynamic phase modulator based on microstructures. First, the overall transmission line structure from the waveguide to the microstrip line to the waveguide is designed, and then the ground structure and the microstructure on the microstrip line are designed. The power feeding changes the carrier concentration of the HEMT in the microstructure to realize the on-off of the microstructure, thereby realizing the dynamic modulation of the phase.

[0031] The structure can also adjust the respective lengths, widths and shapes of the metal capacitor structure of the microstructure, the microstrip line and the two metal segments connected to the feed metal block to obtain the required phase modulation degree and S parameters.

[0032] The principle of phase modulation is: when the modulation signal is fed ...

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Abstract

The invention relates to a dynamic phase modulation device used in a terahertz waveband, and particularly relates to a terahertz dynamic phase modulator based on a microstructure. The terahertz dynamic phase modulator is dynamic and continuously adjustable in phase, and belongs to the technical field of electromagnetic functional devices. According to the invention, the microstructure provided with an HEMT is combined with a microstrip line, and a feed metal block of the microstructure is used for inputting a modulation signal, so that the carrier concentration of the HEMT (High Electron Mobility Transistor) is changed to realize the on-off of the microstructure, and the phase modulation of terahertz waves is realized. According to the invention, the insertion loss is lower than 1.87dB while accurate small-phase dynamic modulation is realized, good working performance is ensured while the phase is dynamically modulated, and the modulation speed is high; the structure is simple, the processing technology is mature, and the manufacturing is convenient; and secondly, the phase modulator is convenient to use, can work in a normal-temperature and normal-pressure environment, and has good application potential and prospect.

Description

technical field [0001] The invention relates to a dynamic phase modulation device used in the terahertz band, in particular to a microstructure-based terahertz dynamic phase modulator, which is dynamic and continuously adjustable in phase, and belongs to the technical field of electromagnetic functional devices. Background technique [0002] The terahertz frequency range is 0.1THz to 10THz. The electromagnetic waves in this frequency range are collectively called terahertz waves. The frequency of this electromagnetic wave is above the millimeter wave and below the infrared. The latter two have been developed relatively maturely, while the former has been developed so far. still at the forefront of research. It can solve some basic scientific problems in physics, chemistry, astronomy, informatics and life sciences, and has demonstrated outstanding performance in the fields of high-speed communication, high-precision imaging, life detection science, outer space technology, rad...

Claims

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Application Information

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IPC IPC(8): H01P1/18H01Q3/34H01Q1/50
CPCH01P1/182H01P1/184H01Q1/50H01Q3/34
Inventor 梁华杰张雅鑫董亚洲曾泓鑫杨梓强梁士雄
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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