应用文章
Modern radar systems Introduction – Part 1
Since the introduction of the radar technology back in the thirties, there has been a continuous race to increase range, resolution and accuracy. The need to avoid jamming and countermeasures has resulted in extremely complex signal generation, reception and analysis scenarios. The initial scheme of a simple fixed or rotating directional antenna emitting short, unmodulated pulses has been dramatically extended through the implementation of complex intra-pulse modulation schemes. To improve resolution while extending the range signal emission was abandoned, completely or partially by methods of pulse compression. Antennas are often based on phase-array architectures where radar beams can be swept over a region of the sky or even electronically track multiple targets simultaneously without pointing directly to them.
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