Radio-frequency front-end circuit and processing method for 110GHz noise coefficient analyzer

Abstract

The invention provides a radio-frequency front-end circuit for a 110GHz noise coefficient analyzer. An input 10MHz-110GHz radio-frequency signal is separated into five channels of signals including a10MHz-4GHz signal, a 4GHz-50GHz signal, a 50GHz-72GHz signal, a 72GHz-86GHz signal and a 86GHz-110GHz signal, wherein after being subjected to low-noise amplification, three channels of signals including the 50GHz-72GHz signal, the 72GHz-86GHz signal and the 86GHz-110GHz signal are subjected to mirror frequency suppression filtering, and then mixed with an intrinsic signal; the generated three channels of intermediate-frequency signals and the 4GHz-50GHz radio-frequency signal are gated and output through a switch; and the 10MHz-4GHz signal is directly output. The radio-frequency front-end circuit for the 110GHz noise coefficient analyzer provided by the invention has the advantages of being simple in structure and low in processing difficulty; and a high-efficiency and accurate millmeterwave signal nose coefficient characteristic test can be realized.

Description

technical field [0001] The invention relates to the technical field of testing, in particular to a radio frequency front-end circuit of a 110GHz noise figure analyzer, and also to a processing method for a radio frequency front end of a 110GHz noise figure analyzer. Background technique [0002] With the development of millimeter-wave radar, guidance, communication and other systems, there is an urgent demand for high-performance broadband millimeter-wave noise figure analyzers with operating frequencies covering millimeter frequency bands, which are mainly used for research and development of various microwave and millimeter-wave communication equipment and components Testing and evaluation during production. It is required that a noise figure analyzer can cover a wide enough frequency range to minimize the number of test instruments while meeting the test requirements of various communication equipment, reduce test cost, shorten test time and facilitate maintenance. [00...

AI Technical Summary

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

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