Final scientific rept. 1 Apr 1964-30 Jun 1967
TECHNICAL UNIV OF DENMARK LYNGBY LAB OF ELECTROMAGNETIC THEORY
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The Van Atta reflector was first described in a patent by Dr. L. C. Van Atta in 1959. The advantage of this passive reflector type should be that the reradiated field has a maximum back in the direction of arrival of the primary plane wave. Since this retrodirective effect of the reflector might be of great importance if used as a navigational aid in the air or at sea, it seemed worth while to carry out a theoretical investigation of such reflectors, especially since only experimental investigations had been made before this contract was initiated. The work performed dealt mainly with theoretical and numerical investigations of Van Atta reflectors consisting of dipoles. A survey of the literature concerning active or passive Van Atta reflectors was made. Both a linear and a two-dimensional plane Van Atta reflector was investigated numerically and a theory for arbitrary Van Atta reflectors was developed. An experimental investigation of a linear Van Atta reflector was carried out and the results compared with the theoretical results.
- Electrical and Electronic Equipment