Switch frequency conversion assembly

Abstract

The invention provides a switch frequency conversion assembly, including a radio frequency input duplex circuit. The radio frequency input duplex circuit is composed of a zero frequency expanded circuit and a single-pole-four-throw switch. Separate transmission of low frequency input signals and high frequency input signals is achieved. The zero frequency expanded circuit is characterized by low-loss transmission in the low frequency range, has a filtering effect on high frequency signals, and achieves the effect of separate low-loss transmission of the low frequency input signals and the high frequency input signals. Two output ports output low frequency output signals and intermediate frequency output signals respectively. The switch frequency conversion assembly achieves precise measurement of 3Hz-86GHz signal frequency and power parameters by once connection. The switch frequency conversion assembly is advantaged by simple structure, low processing difficulty and low cost, and solves the problem that the existing frequency spectrum testing scheme is low in testing frequency and poor in frequency power parameter measurement accuracy.

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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