Backscattering from resistive strips
Abstract
Strips made of a resistive sheet material have lower backscattering cross sections than the corresponding perfectly conducting strips, and this is true in particular when the illumination is edgeon with the electric vector parallel to the edge. Attention is focused on this case. Using the moment method applied to an appropriate integral equation, data are obtained for the surface field and backscattered far field of a resistive strip for a variety of strip widths w and uniform resistances R. The front and rearedge contributions to the far field are then extracted. It is shown that for strips whose width is greater than about a halfwavelength the former is the same as for a halfplane having the same resistance, whereas the latter is proportional to the square of the current at that point on the halfplane corresponding to the rear edge of the strip. The implications of these results on the selection of a strip resistance for low backscattering are discussed.
 Publication:

IEEE Transactions on Antennas and Propagation
 Pub Date:
 November 1979
 DOI:
 10.1109/TAP.1979.1142189
 Bibcode:
 1979ITAP...27..808S
 Keywords:

 Antenna Arrays;
 Backscattering;
 Electrical Resistivity;
 Electromagnetic Scattering;
 Grazing Incidence;
 Scattering Cross Sections;
 Dielectrics;
 Far Fields;
 Half Planes;
 Wave Diffraction;
 Communications and Radar