Terahertz Low Noise Miniaturized Image Frequency Suppression Transceiver Front-End Based on Heterogeneous Integration

Abstract

The invention provides a terahertz low-noise miniaturized image frequency suppression transceiver front-end based on heterogeneous integration, which belongs to the technical field of terahertz wireless communication and includes an intermediate frequency circuit and a terahertz circuit arranged up and down. The terahertz circuit includes a local oscillator frequency tripler, 135° 3 dB filter coupler, RF waveguide power divider and two quartz heterogeneous integrated subharmonic mixers; input unit, first output unit, isolation unit and second output unit of 135° 3 dB filter coupler The resonant cavity of the input unit is coupled through the resonant groove in turn to form a ring structure. The cavity length of the input unit is twice that of the other three units, and the waveguide length difference between the first output unit and the second output unit is 45°. The present invention adopts a ring-shaped 135° 3 dB filter coupler with dual functions of filtering and coupling, realizes circuit miniaturization, suppresses intrinsic noise at the same time, and obtains a low-noise image frequency suppressing transceiver front end.

Description

technical field [0001] The invention belongs to the technical field of terahertz wireless communication, and in particular relates to a terahertz low-noise miniaturized image frequency suppression transceiver front end based on heterogeneous integration. Background technique [0002] Terahertz waves refer to electromagnetic waves with a frequency in the range of 0.1 to 10 THz. Its spectrum is between millimeter waves and infrared light waves. An important extension of scientific research. Due to the moderate beam width, large bandwidth and high confidentiality of terahertz waves, its application prospects in the field of high-speed wireless communication have attracted widespread attention at home and abroad, and it is urgent to carry out research on new systems and methods for terahertz high-speed communication. Integrated transceiver front-end technology is one of its core. [0003] The reported front-ends of terahertz solid-state high-speed communication systems have pr...

AI Technical Summary

Problems solved by technology

[0004] Terahertz image frequency suppression receiving front-end has been reported abroad[B. Thomas, S. Rea, B. Moyna, et al. A 320-360 GHz subharmonically pumped image rejection mixer using planarSchottky diodes[J]. IEEE Microwave and Wireless Components Letters, 2009, 19(2): 101-103], but due to the imperfect circuit structure, the image frequency suppression is poor

Images