Frequency converter phase consistency testing device and method

Abstract

The invention provides a frequency converter phase consistency testing device; the frequency converter passing the test can serve as a calibration frequency converter and a reference frequency converter, thus carrying out phase consistency test for a tested frequency converter; internal excitation employs the same frequency basis reference, signals of a first signal source are divided into two routes by a power divider, and the signals are applied to radio frequency input ports of the calibration frequency converter and reference /test frequency converter; signals of the second signal source are divided into two routes, and the signals are applied to local oscillator drive ports of the calibration frequency converter and reference /test frequency converter; the calibration frequency converter output is connected with a first receiver, and the reference /test frequency converter output is connected with a second receiver; the local oscillator source down-converting the signals received by the first and second receivers to an intermediate frequency; the intermediate frequency signals are digitally sampled and vector calculation is carried out, thus obtaining complex number signals and sending same to a computer module. The frequency converter phase consistency testing device and method are not limited by the frequency converter internal structure, 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...

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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 v

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