A 1.56 THz Spot Scanning Radar Range for Fully Polarimetric W-Band Scale Model Measurements
نویسندگان
چکیده
A radar transceiver operating at 1.56 THz has recently been developed to obtain coherent, fully polarimetric W-band (98 GHz) RCS images of 1:16 scale model targets. The associated optical system operates by scanning a small focused beam of sweptfrequency radiation across a scale model target to resolve individual scattering centers and obtain the scaled RCS values for the centers. Output from a tunable microwave source (10 17 GHz) is mixed with narrow band submillimeter-wave radiation in a Schottky diode mixer to produce the chirped transmit signal. Two high-frequency Schottky diode mixers are used for reception of the V-pol and H-pol receive states, with a fourth mixer providing a system phase reference. The full 2x2 complex polarization scattering matrix (PSM) for each resolved center is obtained following off-line data processing. Measurement examples of five simple calibration objects and a tank are presented.
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