Multi-channel synchronization excitation source system

Abstract

The invention provides a multi-channel radar synchronization excitation source system which comprises a high-precision frequency source system, a multi-channel radar signal waveform synthesis system and a detection feedback system. The high-precision frequency source system provides a high-precision reference clock for the multi-channel radar signal waveform synthesis system. The multi-channel radar signal waveform synthesis system achieves direct synthesis of output radar signal waveforms through DDS. The detection feedback system couples output signals of all channels of the multi-channel radar signal waveform synthesis system, the amplitude difference values and the phase difference values among all the channels are extracted through a series of algorithms, the amplitude difference values and the phase difference values are fed back into the radar signal waveform synthesis system, the multi-channel radar signal waveform synthesis system adjusts the amplitude and the phase of the output signals of all the channels in real time according to the feedback difference values, and all the channels of the radar signal waveforms output by the entire multi-channel radar system are made to be strictly the same in frequency, amplitude and phase in the end, namely a multi-channel synchronization excitation source is formed.

Description

technical field [0001] The invention relates to a multi-channel synchronous excitation source system in which the output waveform amplitude, frequency and phase of each channel are strictly consistent in a multi-channel radar system. Background technique [0002] With the continuous development and progress of multi-channel phased array technology, the requirements for the waveform characteristics of each channel output are becoming more and more stringent. For a multi-channel radar system, the consistency of the amplitude, frequency, and phase of the output waveforms of each channel is an important indicator to measure the quality of a multi-channel radar system. The amplitude, frequency and phase of the output waveform signal of each channel of the radar will directly affect the beamforming of the entire phased array radar system, and the multi-channel radar system whose consistency is not ideal can not even work normally. [0003] Traditional multi-channel excitation sou...

AI Technical Summary

Problems solved by technology

The centralized type refers to the equal-power output through an excitation source. However, due to the subtle differences in the length and material process of each channel, the characteristics of the channels cannot be completely consistent, which affects the radar waveform signal at the output end. amplitude and phase

Distributed means that each channel has an independent source, and the parameters of each source can be adjusted independently, so it is more flexible and changeable than distributed. However, because the sources are independent of each other, it is difficult to make source synchronous output

[0004] Therefore, neither the centralized excitation source nor the distributed excitation source can strictly guarantee the consistency of the amplitude, frequency and phase characteristics of the output radar signal waveform between the various channels.

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