Abstract
A free-space measurement system at 220 GHz ∼ 300 GHz has been built with stepped frequency continuous wave (SFCW) for Radar cross section (RCS) measurements. The system consists of vector network analyzer, Millimeter-Wave Converters and target support structure. The measurement techniques such as background subtraction, synchronous calibration and range distance compensation are verified by RCS measurement data. The system measurement accuracy is control within about ±3 dB at −21 dBsm.
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