Measuring phase noise from high-end signal sources for radar systems
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چکیده
Signal source quality is a primary driver of performance in advanced radar systems. Lower phase noise in signal sources means better spatial resolution and more accurate velocity measurements of moving objects. Developers have to be able to measure phase noise, even in pulsed mode, in order to minimize it. These measurements have previously required complex systems consisting of phase detectors, FFT spectrum analyzers and extremely low-noise reference signal sources. These sources have to deliver significantly better quality than those of the DUT in order to ensure accurate measurement results. If the reference signal sources are too noisy, developers can also use cross-correlation based on two Fig. 1: R&S®FSWP phase noise analyzer and VCO tester.
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