Novel heterodyne detector based on substrate integrated waveguide antenna

Abstract

The invention discloses a novel heterodyne detector based on a substrate integrated waveguide antenna. The detector comprises the substrate integrated waveguide antenna and a three-push oscillator. The substrate integrated waveguide antenna is connected with the three-push oscillator. The substrate integrated waveguide antenna is used for receiving a terahertz wave signal in an external space andthen transmitting the signal to the three-push oscillator. The three-push oscillator can be used as a local oscillator signal source and a mixer, and is used for generating a local oscillator signal,receiving the terahertz wave signal from the substrate integrated waveguide antenna, and then mixing the local oscillator signal with the terahertz wave signal to generate an intermediate frequency signal to be detected. According to the novel heterodyne detector based on the substrate integrated waveguide antenna, which is provided by the invention, the structure is relatively simple, scientificand reasonable; the output response of the detector can be increased; the noise equivalent power is reduced; the requirement of terahertz wave detection is fully satisfied; and the detector has a great production practice significance.

Description

technical field [0001] The invention relates to the technical field of terahertz wave detection, in particular to a novel heterodyne detector based on a substrate integrated waveguide antenna. Background technique [0002] Terahertz ray is a kind of electromagnetic wave, or terahertz wave, between microwave and infrared, also called T-ray (T-Ray), its frequency range is generally 0.1THz-10THz. In the field of optics, it is called far-infrared radiation, and in the field of radio physics, it is called submillimeter wave according to its wavelength smaller than the millimeter level. [0003] For a long time, for terahertz rays, due to the lack of high-emissivity terahertz signal sources and high-performance detectors, terahertz rays in this band have been in a state to be studied, and have not been deeply explored and explored. application, and is called the "terahertz gap". [0004] At present, terahertz waves and their applications have become a hot field in the scientific...

AI Technical Summary

Problems solved by technology

[0006] Incoherent detection detectors have the advantages of simple system and low power consumption, but there are problems such as low detector responsivity and poor noise equivalent power performance, so it is difficult to receive very weak terahertz signals

The coherent detection detector has the advantages of high responsivity, good noise equivalent power performance, and can receive very weak terahertz signals, but there are problems such as complex system, large area, and large power consumption.

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