Broadband terahertz mixer with low frequency conversion loss

A frequency conversion loss and terahertz technology, applied in the field of solid-state terahertz devices, can solve the problems of complex RF and local oscillator matching circuits, increase or decrease of circuit size, increase of circuit loss, etc., to improve operating frequency and stability, and reduce transmission loss , The effect of simplifying the circuit size
CN112332780AActive Publication Date: 2021-02-0510TH RES INST OF CETC
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
10TH RES INST OF CETC
Publication Date
2021-02-05

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Abstract

The invention discloses a broadband terahertz mixer with low frequency conversion loss, and aims to achieve high isolation, simple structure, high working frequency, low frequency conversion loss andwide working bandwidth. According to the technical scheme, a quartz circuit cavity penetrates through a radio frequency height reduction waveguide and a local oscillation height reduction waveguide, an anti-parallel terahertz Schottky diode is arranged between a radio frequency direct current ground microstrip line and a radio frequency matching branch knot on the upper surface of a quartz substrate, and the radio frequency direct current ground microstrip line and the radio frequency matching branch knot sequentially pass through a radio frequency transition suspension microstrip line; a local oscillator low-pass filter and a local oscillator matching network are connected in series, the local oscillator transition microstrip penetrates through the local oscillator height reduction waveguide and is connected with the intermediate frequency low-pass filter in series, and finally a frequency mixing signal is output through an intermediate frequency port.
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Description

technical field

[0001] The invention relates to a solid-state terahertz device applied in the technical field of terahertz, more specifically, to a wide-band low-frequency conversion loss terahertz mixer. Background technique

[0002] With the development of terahertz technology, terahertz solid-state devices have shown unprecedented application potential in radio astronomy, nondestructive testing, object imaging, security inspection, high-speed communication and other fields. For a superheterodyne receiver in the terahertz frequency band, the mixer is an essential key component of the receiving front end, which can realize the function of spectrum shifting. However, due to the lack of mature terahertz low-noise amplifier chips, the first stage of the terahertz receiving front end is usually a terahertz mixer. Therefore, the specifications of the mixer greatly affect the overall performance of the receiving system. For example, the size of the frequency conversion loss of t...

Claims

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