Signal source for multi-carrier micro-discharge test of spaceborne microwave component

Abstract

A signal source for a multi-carrier micro-discharge test of a spaceborne microwave component comprises a digital multi-carrier signal generation module, a digital analog signal fast conversion module and a signal output module, can directly generate multi-carrier composite signals with different initial phase distributions and different frequency distributions, and is used for a multi-carrier micro-discharge test of a spacebrone microwave component. The signal source can generate multi-carrier signal digital sampling point values together with the multi-carrier time-domain expressions with different phase distributions, and outputs the generated multi-carrier digital sampling points to the digital analog signal fast conversion module; after that, the digital analog signal fast conversion module processes multi-carrier signals into an I analog signal and a Q analog signal, and sends the analog signals to the signal output module; and the signal output module achieves low-pass filtering, baseband amplification, mixing and radio frequency output of the analog signals, and generates output baseband signals and radio frequency signals. The signal source provided by the invention dispenses with a multiplexer, does not need a phase shifter for manual phase regulation, and can accurately control the initial phases of all carriers.

Description

technical field [0001] The invention relates to a signal source for multi-carrier micro-discharge testing of space-borne microwave components, which belongs to the field of space microwave special effects. Background technique [0002] Before the satellite-borne microwave components fly in orbit, strict ground simulation test verification must be carried out to ensure the safety of the satellite in orbit. The micro-discharge effect is one of the most important problems encountered by spaceborne resonant microwave components, so a series of tests must be carried out on the ground to ensure that no micro-discharge occurs at the maximum operating power. At present, most communication satellites work in multi-carrier mode, that is, multiple carriers with different frequencies are transmitted simultaneously in the same transmission channel. For multi-carrier microwave components, the single-carrier equivalent method is usually used for experimental verification. For example, for...

AI Technical Summary

Problems solved by technology

This method mainly uses a phase shifter to manually adjust the initial phase of a single signal, but it can only achieve the same phase distribution of each carrier, and cannot effectively and accurately adjust the initial phase

Studies have shown that spaceborne microwave components are not the most prone to micro-discharge under the action of multi-carrier composite signals with the same initial phase, so the traditional method of generating multi-carrier signals cannot effectively carry out multi-carrier micro-discharge test verification

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