Terahertz broadband even harmonic mixing circuit based on distributed radio frequency loop and mixer

A radio frequency circuit and even-order harmonic technology, which is applied in the field of terahertz broadband even-order harmonic mixing circuits and mixers, to achieve the effect of improving performance, solving the mutual constraints between broadband and high efficiency, and reducing the impact

Pending Publication Date: 2020-11-03
CHINA ELECTRONIS TECH INSTR CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The broadband mixing detector based on the planar Schottky diode is the core component of the terahertz test instrument. Its main function is to convert the high-frequency terahertz signal into a low-frequency microwave signal, and then realize the analysis of the terahertz signal through the analysis of the microwave signal. Processing; since there is no terahertz broadband commercial low-noise amplifier above 200 GHz, the mixer has become the first stage of the signal receiving front end in the terahertz test instrument. How to realize the low conversion loss of the terahertz mixer in the broadband Performance indicators such as noise and temperature have become the key to improving the performance of terahertz test instruments. However, the inventors found that the technical route of existing terahertz even-order harmonic mixers mostly adopts a single-loop technical approach. The wavelength of the frequency band is long, and the influence of the circuit of the mixer on the performance of the mixer is relatively small, but as the frequency continues to increase, the influence of the circuit becomes larger and larger, making the broadband of the terahertz even harmonic mixer The contradiction between band characteristics and low frequency conversion loss characteristics is becoming more and more prominent

Method used

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  • Terahertz broadband even harmonic mixing circuit based on distributed radio frequency loop and mixer
  • Terahertz broadband even harmonic mixing circuit based on distributed radio frequency loop and mixer

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Embodiment 1

[0025] The purpose of this embodiment is to provide a terahertz broadband even-order harmonic mixing circuit based on a distributed radio frequency loop.

[0026] Terahertz broadband even-order harmonic mixing circuit based on distributed RF loop, including RF input probe, anti-parallel diode pair, cascaded wide stopband high rejection local oscillator filter, local oscillator input probe, intermediate frequency filter And the intermediate frequency output port, and the sequential connection is integrated on the microstrip line;

[0027] The radio frequency input probes are grounded, and the near radio frequency input ends of the antiparallel diode pairs are distributedly grounded, forming a distributed multi-radio frequency loop.

[0028] Further, the distributed grounding of the parallel diode pair adopts a high and low impedance line structure, and the high and low impedance line structure is as follows figure 2 The above 9 and 10; the distributed grounding of the paralle...

Embodiment 2

[0032]The purpose of this embodiment is to provide a terahertz broadband even-order harmonic mixer based on a distributed radio frequency loop.

[0033] A terahertz broadband even harmonic mixer based on a distributed radio frequency circuit, comprising a radio frequency input waveguide, a local oscillator input waveguide, and the above-mentioned terahertz broadband even harmonic mixer circuit based on a distributed radio frequency circuit.

[0034] The terahertz broadband even-order harmonic mixing circuit and mixer based on the distributed radio frequency loop provided by the above embodiments can be fully realized and have broad application prospects.

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Abstract

The invention provides a terahertz broadband even harmonic mixer circuit based on a distributed radio frequency loop and a mixer, and the mixer circuit comprises a radio frequency input probe, an anti-parallel diode pair, a cascaded wide stop band high suppression local oscillator filter, a local oscillator input probe, an intermediate frequency filter and an intermediate frequency output port, which are sequentially connected and integrated on a microstrip line. The radio frequency input probe is grounded, and the near radio frequency input end of the antiparallel diode pair is grounded to form a distributed multi-radio frequency loop. According to the circuit, the distributed multi-radio-frequency loop is utilized, the influence of the ground loop on the bandwidth, low frequency conversion loss and other performance of the terahertz even-order mixer is effectively reduced, the local oscillation harmonic clutter is matched through the distributed multi-radio-frequency loop, the influence of the terahertz harmonic clutter is reduced, the bandwidth of the mixer is expanded, and the frequency conversion loss of the mixer is reduced.

Description

technical field [0001] The present disclosure relates to the technical field of even-order harmonic mixers, and in particular to a terahertz broadband even-order harmonic mixing circuit and a mixer based on a distributed radio frequency loop. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] The broadband mixing detector based on the planar Schottky diode is the core component of the terahertz test instrument. Its main function is to convert the high-frequency terahertz signal into a low-frequency microwave signal, and then realize the analysis of the terahertz signal through the analysis of the microwave signal. Processing; since there is no terahertz broadband commercial low-noise amplifier above 200 GHz, the mixer has become the first stage of the signal receiving front end in the terahertz test instrument. How to realize the low convers...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03D7/16
CPCH03D7/16
Inventor 邓建钦王沫年夫顺姜万顺贾定宏辛海鸣张胜洲王明超陈卓
Owner CHINA ELECTRONIS TECH INSTR CO LTD
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