Terahertz low-noise communication system transceiving front end based on GaAs monolithic integration

Abstract

The invention provides a terahertz low-noise communication system transmit-receive front end based on GaAs monolithic integration, and belongs to the technical field of terahertz wireless communication, the terahertz low-noise communication system transmit-receive front end comprises an intermediate frequency circuit and a terahertz circuit, the terahertz circuit comprises a local oscillator frequency tripler, a local oscillator homodromous 3dB filtering coupler, a radio frequency 180-degree filtering coupler and two terahertz GaAs monolithic integration subharmonic mixers; the local oscillator equidirectional 3 dB filtering coupler and the radio frequency 180-degree filtering coupler comprise an annular cylindrical resonant cavity and four rectangular waveguides, the annular cylindrical resonant cavity is divided into a large fan annular resonant cavity and three small fan annular resonant cavities through four fan annular grooves, and the central angle of the large fan annular resonant cavity is twice that of the small fan annular resonant cavities; and the four rectangular waveguides are correspondingly connected with the four sector-ring-shaped resonant cavities respectively. According to the invention, the local oscillator same-direction 3dB filtering coupler and the radio frequency 180-degree filtering coupler which have coupling and filtering functions are adopted, so that the low local oscillator noise suppression transceiving front end is realized.

Description

technical field [0001] The invention belongs to the technical field of terahertz wireless communication, and in particular relates to a GaAs single-chip integrated terahertz low-noise communication system transceiver front end. Background technique [0002] With the increasing development of high-speed interconnection applications in space networking, the contradiction between limited spectrum resources and rapidly growing high-speed service requirements faced by wireless communications has put forward an urgent demand for the development of new high-speed communication technologies, and the development of broadband and large-capacity wireless information transmission Technology is the primary key technology for future communication systems. [0003] Terahertz waves are in the transition region between macroelectronics and microphotonics, and have characteristics different from microwaves and light waves. It is a new frequency band in the electromagnetic spectrum that has no...

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Problems solved by technology

[0006] Aiming at the problems existing in the above-mentioned prior art, the present invention provides a terahertz low-noise communication system transceiver front-end based on GaAs monolithic integration, which solves the inherent problem of deterioration of the noise performance of the transceiver front-end caused by multiple frequency doubling of the local oscillator drive source

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