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In radar systems, detectors are mainly used to convert the echo signal received by radar from radio frequency (RF) signal into baseband signal for further processing such as distance measurement and target speed measurement. Specifically, the high-frequency RF signals emitted by the radar excite the scattered waves on the target, and after these echo waveform signals are received, the signal demodulation processing needs to be carried out through the detector. The detector converts changes in the amplitude and frequency of high-frequency RF signals into DC or low-frequency electrical signals for subsequent signal processing.
The detector is actually part of the functional module in the radar receiving path, mainly including a signal amplifier, mixer, local oscillator, filter and amplifier composed of echo signal receiver. Among them, the local oscillator can be used as a reference signal source (Local Oscillator, LO) to provide a co-signal for mixer mixing, and filters and amplifiers are mainly used for weak clutter filtering of circuits and IF signal amplification. Therefore, the detector plays an important role in the radar system, and its performance and working stability directly affect the detection and tracking ability of the radar system.
Post time: Jun-25-2023