Accession Number : ADA325523

Title :   Measurements and Calculations of the Millimeter Wavelength RCS of a Top Hat and Bruderhedrals.

Descriptive Note : Final rept. 1995-1996,

Corporate Author : ARMY RESEARCH LAB ADELPHI MD

Personal Author(s) : Silverstein, Joseph D. ; Bender, Robert

PDF Url : ADA325523

Report Date : MAR 1997

Pagination or Media Count : 42

Abstract : Polarimetric radar cross sections (RCSs) were measured for a large top hat and three large Bruderhedrals at 35 and 93 GHz. The overall spread in the measured RCSs was 2 dB. It was found that the absolute RCS, as well as the dependence of the RCS on elevation angle, could be significantly altered by a slight misalignment of the target reflector. The calculations of these RCSs by theories and RCS simulation codes based on geometric and physical optics generally agreed with the measurements to within 3 dB. Radar calibrations using these reflectors, which are based on the predictions, are not reliable, however, if accuracy better than 3 dB is required. The measured values of the cross polarization RCS were very small compared to the copolarization ones, consistent with theoretical predictions.

Descriptors :   *RADAR CROSS SECTIONS, *CALIBRATION, *RADAR REFLECTORS, FREQUENCY, SIMULATION, ANGLES, MILLIMETER WAVES, POLARIMETRY, CODING, MATHEMATICAL PREDICTION, CROSS POLARIZATION.

Subject Categories : Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE