A switch frequency conversion component

Abstract

The invention provides a switching frequency conversion component, which includes a radio frequency input duplex circuit, and the radio frequency input duplex circuit is composed of a zero-frequency expansion circuit and a single-pole four-throw switch, so as to realize the separation and transmission of a low-frequency input signal and a high-frequency input signal; The frequency expansion circuit has the characteristics of low-loss transmission in the low-frequency range, and has a filtering effect on the high-frequency signal, so as to realize the low-loss transmission of the low-frequency input signal and the high-frequency input signal respectively; the two output ports output the low-frequency output signal respectively. and IF output signal. The switching frequency conversion component proposed by the invention can realize accurate measurement of signal frequency and power parameters of 3 Hz to 86 GHz in a single connection; and has the advantages of simple structure, low processing difficulty and low cost, and solves the problem of low test efficiency and low cost of the existing spectrum test scheme. The problem of poor measurement accuracy of frequency power parameters.

Description

technical field [0001] The invention relates to the technical field of testing, in particular to a switch frequency conversion component. 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 spectrum analyzers with operating frequencies covering millimeter frequency bands, which are mainly used for the R&D and production of various microwave and millimeter-wave communication equipment and components testing and evaluation during the process. It is required that a spectrum 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. [0003] At present, due to the limitation of technical conditions, it is impossible to realize the broadband pre-selection filter for frequenc...

AI Technical Summary

Problems solved by technology

[0009] It can be known from the principle of the measurement signal frequency of the millimeter-wave module in formula (1), since there is no pre-selection filter, it will be very difficult to determine the "±" in the formula to accurately measure the frequency of the signal under test

[0010] Since the input terminal of the millimeter-wave spread spectrum module is a standard rectangular waveguide, and the waveguide has a low-frequency cut-off characteristic, the working frequency of the millimeter-wave spread spectrum module can only realize the spectrum test whose frequency range covers one waveguide frequency band, and cannot achieve complete frequency coverage from low frequency to waveguide frequency band. , and the millimeter wave spread spectrum module has the problems of low compression point and difficult identification of false signals

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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