Why Is Low Phase Noise Critical For Radar Systems?
Source: Wireless Telecom Group
An ideal, mathematically calculated carrier signal is free of distortions with respect to time. In the frequency domain, it appears as a clean carrier signal at a specific power level.
Real-world carrier signals have random fluctuations in amplitude and phase over time, which results in spectrum spreading. Instead of a narrow carrier frequency, unwanted sidebands develop on both sides of the carrier. Phase noise measurements are used to analyze these random frequency instabilities.
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