Fin line structure-based terahertz third-harmonic mixer

Abstract

The invention discloses a fin line structure-based terahertz third-harmonic mixer. The fin line structure-based terahertz third-harmonic mixer comprises a metal cavity used for placing circuits, a substrate, a radio frequency input circuit and a local oscillation transitional circuit; the substrate is positioned in the metal cavity; the radio frequency input circuit and the local oscillation transitional circuit are positioned on the substrate; the radio frequency input circuit and the local oscillation transitional circuit are connected through local oscillation matching branches; the input end of the radio frequency input circuit is connected with radio frequency transitional waveguide; the fin line branch structure arranged on the radio frequency input circuit is directly connected withthe metal cavity; a Schottky diode pair on the radio frequency input circuit is mounted on the fin line; the fin line branch structure is also in grounding connection with a direct current; and the direct current grounding is positioned at the radio frequency input end of the radio frequency input circuit. By adoption of the structure, and by adopting the fin line structure in the radio frequencyport, high grounding of the direct current component in the Schottky diode can be ensured, so that the universality problem of the existing old harmonic mixer can be solved; and the terahertz third-harmonic mixer has less spurious signals and high compression point.

Description

technical field [0001] The invention relates to the field of mixers, in particular to a terahertz third harmonic mixer based on a fin wire structure. Background technique [0002] Terahertz waves refer to electromagnetic waves with a frequency in the range of 0.1THz to 10THz, and a wavelength in the range of 0.03mm to 3mm, which is between microwave and infrared; at both ends of the wave band, they coincide with millimeter waves and infrared light respectively, so that terahertz waves have It has some characteristics that electromagnetic waves in other frequency bands do not have. Before the 1980s, the microwave frequency band and the infrared frequency band became mature after considerable development; however, the terahertz wave band was in the transition zone between macroscopic classical theory and microscopic quantum theory, and at the same time in the transition zone between electronics and photonics. The level of cognition and research techniques are relatively limit...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to ensure that the DC component in the Schottky diode in the odd mixer is well grounded, and the purpose is to provide a terahertz third harmonic mixer based on a fin wire structure. The line structure ensures that the DC component in the Schottky diode can be well grounded, and solves the common problem of the existing odd-order mixer. The third-order harmonic mixer of the terahertz has fewer stray signals and a high compression point.

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