Intermediate frequency processing system of vector network analyzer and method for intermediate frequency processing

Abstract

The invention discloses an intermediate frequency processing system of a vector network analyzer and a method for intermediate frequency processing. The intermediate frequency processing system comprises a field programmable gate array. The FPGA is respectively connected with a logic phase-locked loop circuit unit and an analog-digital conversion unit, the logic phase-locked loop circuit unit is connected with an intermediate unit, the intermediate unit is connected with the analog-digital conversion unit, the intermediate unit comprises an intermediate reference signal end, a first reflected signal end and a second reflected signal end, and the intermediate reference signal end is connected with the logic phase-locked loop circuit unit. The technical mode of the FPGA, the logic phase-locked loop circuit unit, the analog-digital conversion unit and the intermediate unit is adopted, so that the technical problem that due to the fact that the size of a circuit board is limited, the local arrangement of a multi-pin connector is difficult is solved, the number of devices and pins of the connector is effectively reduced, the size of the product is reduced, power consumption is reduced, and cost is reduced.

Description

technical field [0001] The invention relates to an intermediate frequency processing system and an intermediate frequency processing method of a vector network analyzer. Background technique [0002] The vector network analyzer is the main test instrument for the performance of radio frequency and microwave products. The traditional two-port vector network analyzer generates excitation signals through the excitation signal source module. The test port output is used as an excitation signal source to stimulate the DUT, and the signal reflected by the DUT is output through the coupling port of the directional coupler, and the signal is sent to the frequency conversion receiving module as a test signal. In the frequency conversion receiving module, the reference signal and the test signal are mixed with the local oscillator signal from the local oscillator signal source module to obtain the intermediate frequency signal, and the three intermediate frequency signals of the refer...

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Problems solved by technology

[0003] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide an intermediate frequency processing system and an intermediate frequency processing method of a vector network analyzer, to solve the technical problems of limited circuit board volume and difficult layout of multi-pin connectors, and to realize variable Efficient acquisition and processing of intermediate frequency signals, reducing circuit size and power consumption

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