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A corrugated surface with low backscatter

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2 Author(s)
A. Bhattacharyya ; Indian Institute of Technology, Kharagpur, India ; S. Tandon

A low backscatter corrugated metal surface has been designed, fabricated, and tested for H -polarized transverse electromagnetic (TEM) incident waves. The problem has been formulated using the scattering matrix approach and reflection and transmission co-efficients at the fin-air interface are determined using an integral equation approach. Hence, an expression for monostatic radar cross section (RCS) is obtained. The RCS has been experimentally measured using a continous wave (CW) radar and good agreement has been obtained with theoretical results. The fin-corrugated surface gives a rather small return (35 dB down with respect to the flat conducting plate of same size) for incident angles up to 80.6\deg when the period of corrugation a is in the range \lambda /2 < a < \lambda .

Published in:

IEEE Transactions on Antennas and Propagation  (Volume:32 ,  Issue: 8 )