Analysis and Testing of a Bistatic Radar Cross Section Measurement Capability for the AFIT Anechoic Chamber
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING
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This research effort examined the feasibility of performing bistatic radar cross section RCS measurements in the AFIT anechoic chamber. The capability was established to measure the bistatic RCS of a target versus frequency and versus target azimuth angle. In either case, one of three bistatic angles angle between transmit and receive antennas is available 45 degrees, 90 degrees, and 135 degrees. Accurate bistatic RCS measurements were obtained using a CW radar and utilizing background subtraction, bistatic calibration, and software range gating. Simple targets were selected for validation purposes since their bistatic RCS could be predicted. These consisted of spheres and flat plates square, triangle, and five sided. Several computer codes were utilized for system validation. Two codes based on the Uniform Theory of Diffraction were used to predict the scattering from the flat plates. A program using a Mie series solution provided the exact scattering from the flat plates. A program using a Mie series solution provided the exact scattering for the spheres, which were used for both RCS predictions and system calibrations.
- Active and Passive Radar Detection and Equipment