An inverter phase consistency test device and method

Abstract

The present invention proposes a phase consistency test device for frequency converters. The frequency converters that pass the test are used as calibration frequency converters and reference frequency converters, and the phase consistency test is performed on the test frequency converters to be tested; the internal excitation adopts the same frequency reference standard, the first The first signal source divides the signal into two paths through the power divider, which acts on the RF input port of the calibration frequency converter and the reference / test frequency converter; the second signal source divides the signal into two paths through the power divider, and acts on the calibration frequency converter and the local oscillator drive port of the reference / test inverter; the output of the calibration inverter is connected to the first receiver, the output of the reference / test inverter is connected to the second receiver, and the first receiver and the second receiver are connected through the local oscillator source. The received signal of the receiver is down-converted to an intermediate frequency, and then the intermediate frequency signal is processed by digital sampling and vector calculation, and the obtained complex signal is transmitted to the computer module. The invention is not limited to the internal structure of the frequency converter, the calibration process is simple, and the hardware cost is lower.

Description

technical field [0001] The invention relates to the technical field of testing, in particular to a frequency converter phase consistency testing device, and also to a frequency converter phase consistency testing method. Background technique [0002] Microwave frequency converters are used in radar, communication, electronic reconnaissance and other electronic equipment and microwave and millimeter wave test instruments to realize frequency conversion functions. They are important components of microwave and millimeter wave systems, and their characteristics directly affect the performance of equipment or instruments. In the signal receiving and processing of radar, communication, and test instruments, large bandwidth processing is required, and there are requirements for the phase flatness and group delay of the frequency converter. However, since the input, local oscillator and intermediate frequency ports of the frequency converter work at different frequencies, they cann...

AI Technical Summary

Problems solved by technology

Both of these methods need to perform frequency conversion settings on the test network instrument to ensure that the received signals can be compared, which in turn increases the complexity of connection settings

Moreover, there are many calibration steps in these two methods, at least 11 steps for vector calibration, and at least 9 steps for scalar + phase. The calibration process is complicated and easy to cause operational errors.

[0004] In the face of mass production and manufacturing, the complex connection and calibration of the phase test of the existing inverter will affect the efficiency

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