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Measurements and predictions of the RCS of Bruderhedrals at millimeter wavelengths

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2 Author(s)
Silverstein, J.D. ; Army Res Lab., Adelphi, MD, USA ; Bender, R.

Polarimetric radar cross sections (RCSs) were measured for two large Bruderhedrals at 35 and 93 GHz. The overall spread in the measured RCS 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 Bruderhedral. The calculations of these RCSs by theories for a top hat and RCS simulation codes based on geometric and physical optics (PO) generally agreed with the measurements to within 3 db. Radar calibrations using these Bruderhedrals that are based on the predictions are not reliable, however, if accuracies better than 3 dB are required, The measured values of the cross-polarization RCS were very small compared to the copolarization ones, consistent with the codes and theoretical considerations

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Antennas and Propagation, IEEE Transactions on  (Volume:45 ,  Issue: 7 )