Novel monolithic integrated terahertz second harmonic mixer

Abstract

The invention discloses a novel monolithic integrated terahertz second harmonic mixer, and relates to the technical field of terahertz mixers. The mixer comprises a substrate; a mixing circuit is formed on the substrate, the mixing circuit comprises a radio frequency input port, the radio frequency input port is connected with one end of a radio frequency filtering structure through a radio frequency matching structure, the other end of the radio frequency matching structure is divided into two paths, the first path is connected with one end of an intermediate frequency filtering structure, and the second path is connected with the input end of the mixing diode pair; the local oscillation port is connected with one end of the local oscillation filtering structure through the local oscillation matching structure, the other end of the local oscillation filtering structure is connected with the input end of the frequency mixing diode pair, and the other end of the intermediate frequency filtering structure is connected with the intermediate frequency output port. The mixer is mature in process, good in chip consistency and capable of being tested and screened on a chip.

Description

technical field [0001] The invention relates to the technical field of terahertz mixers, in particular to a novel single-chip integrated terahertz second harmonic mixer. Background technique [0002] Terahertz (THz) waves refer to electromagnetic waves in the frequency range of 0.3THz~3THz, where 1THz=1000GHz. Now the industry generally believes that the range of terahertz frequency can be extended to 0.1THz~10THz, that is, the frequency higher than 100GHz belongs to terahertz frequency. THz waves occupy a unique position in the electromagnetic spectrum, and have broad application prospects in security imaging, high-speed wireless communications, etc., and are currently the focus of the international scientific and technological circles and industrial circles. [0003] Since it is difficult to obtain a large local oscillator driving power in the terahertz frequency band, the mixer in the terahertz frequency band usually adopts the form of harmonic mixing to reduce the local...

AI Technical Summary

Problems solved by technology

However, this method cannot realize the metal through hole connecting the back of the substrate when making the circuit, and the finished chip still needs to be additionally designed with a grounded peripheral circuit

At the same time, the pre-fabricated Schottky diode is affected by the subsequent sputtering plating process, resulting in the risk of performance degradation is also unavoidable

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