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145GHz noise coefficient analyzer radio-frequency front-end circuit and processing method

A radio frequency front-end and noise figure technology, applied in the microwave field, can solve the problems of inability to achieve complete frequency coverage of the waveguide frequency band, uncertainty of measurement results, and low test efficiency, so as to reduce the number of interconnection operations, improve test efficiency, and simple structure Effect

Inactive Publication Date: 2018-04-20
THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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Problems solved by technology

[0005] The input end of the millimeter-wave spread spectrum module is a standard rectangular waveguide. Because the waveguide has a low-frequency cut-off characteristic, the operating frequency of the millimeter-wave spread spectrum module can only cover one waveguide frequency band, and cannot achieve complete frequency coverage from low frequency to waveguide frequency band.
In order to realize frequency scanning from low frequency to waveguide frequency band, multiple connection tests can only be carried out with millimeter wave spread spectrum module and without millimeter wave spread spectrum module, and the test efficiency is low
And because of the need to transfer between the waveguide and the coaxial port, the test is more complicated, and the uncertainty of the measurement result is introduced

Method used

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  • 145GHz noise coefficient analyzer radio-frequency front-end circuit and processing method

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[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0033] At present, due to the limitation of technical conditions, it is impossible to realize a broadband preselection filter with a frequency above 50 GHz, and it is necessary to down-convert the measured signal above 50 GHz to below 50 GHz for noise figure measurement. The noise figure test of the frequency signal above 50GHz is generally realized by using the coaxial noise figure analyzer and the millimeter wave noise figure test spread spectrum module of th...

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Abstract

The invention provides a 145GHz noise coefficient analyzer radio-frequency front-end circuit. Input 10MHz-145GHz radio-frequency signals are divided into six channels of signals in 10MHz-4GHz, 4GHz-50GHz, 50GHz-72GHz, 72GHz-86GHz, 86GHz-110GHz and 110GHz-145GHz, wherein after being subjected to low-noise amplification, the four channels of signals in 50GHz-72GHz, 72GHz-86GHz, 86GHz-110GHz and 110GHz-145GHz are subjected to image frequency suppression filtering, and then mixed with intrinsic signals; generated four channels of intermediate-frequency signals and the 4GHz-50GHz radio-frequency signals are output through switch gating; and the 10MHz-4GHz signals are directly output. The 145GHz noise coefficient analyzer radio-frequency front-end circuit provided by the invention has wide working band; the testing efficiency is greatly increased; and the 145GHz noise coefficient analyzer radio-frequency front-end circuit has the characteristics of being simple in structure and low in processing difficulty.

Description

technical field [0001] The invention relates to the field of microwaves, in particular to a radio frequency front-end circuit of a 145GHz noise figure analyzer, and also relates to a processing method for a radio frequency front end of a 145GHz noise figure analyzer. Background technique [0002] With the development of millimeter-wave radar, guidance, communication and other systems, technical indicators such as sensitivity and dynamic range are key technical indicators to measure the excellent performance of a millimeter-wave system; among them, system noise is closely related to these indicators, and noise reflects from another angle. The performance of the system is of great significance to the accurate measurement of the noise figure. There is an urgent need for a high-performance broadband millimeter-wave noise figure analyzer whose working frequency covers the millimeter frequency band. It is mainly used for testing and evaluating various microwave and millimeter-wave...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/04
Inventor 代秀徐从玉朱伟峰魏连成张枢宋青娥韦柳泰
Owner THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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