Terahertz wave detector based on array patch antenna

Abstract

The invention discloses a terahertz wave detector based on an array patch antenna. The terahertz wave detector comprises an array antenna, a transmission line matching network and a field effect transistor. The array antenna is connected with the field effect transistor through utilization of the transmission line matching network. The array antenna is composed of four identical on-chip rectangular patch antennas and a feed network. The four patch antennas are set in an array form of 2x2. The four patch antennas are connected through utilization of the feed network. The transmission line matching network is a T-shaped impedance matching network composed of three segments of transmission lines. A source of the field effect transistor is connected with the transmission line matching network.A drain of the field effect transistor is taken as a signal output end. A gate of the field effect transistor is connected with a bias voltage source and an open quarter-wave transmission line. According to the terahertz wave detector, the problem that transmission power between the antenna and the field effect transistor is not high due to the fact that a terahertz wave receiving antenna is nothigh in gain can be effectively solved, and the effect that the terahertz wave detector is high in responsivity can be realized.

Description

technical field [0001] The present invention relates to the technical field of terahertz wave detection, and more specifically relates to a terahertz wave detector based on an array patch antenna. Background technique [0002] Terahertz technology is considered to be "one of the top ten technologies that will change the world in the future". At present, the international research level on electromagnetic wave technology on both sides of the terahertz radiation band, that is, infrared technology and microwave technology, has been very mature. Due to the lack of effective terahertz radiation generation and detection means, and this wave band is neither completely suitable for optical theory, nor is it completely suitable for microwave electronics theory, so the current scientific community has limited understanding of this wave band. As a result, terahertz has become the last frequency window that has not been fully studied in the electromagnetic spectrum, so that it is calle...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a terahertz wave detector based on an array patch antenna, which can effectively solve the problem between the antenna and the field effect transistor caused by the low gain of the terahertz wave receiving antenna. The problem of low transmission power achieves the effect of high responsivity of terahertz detectors

Images