Radar retroreflector with polarization control

Details Radar retroreflector with polarization control Radar retroreflector with polarization control

1992-09-16

1994-01-04

Tubbesing, T. H.

Communications: directive radio wave systems and devices (e.g.,

Radar reflector

342188, 342361, 342370, H01Q 2106

Patent

active

052764494

ABSTRACT:
Disclosed is a method and an apparatus which act as a retroreflector of circularly polarized electromagnetic radiation over a broad range of incident angles. The apparatus includes dipole antenna pairs which are orthogonally disposed in relation to one another about a central point to create antennas which consist, for example, of crossed dipoles but can be other circular polarization sensitive antennas. Antenna pairs are then arranged symmetrically in an array and interconnected by means which control the circular polarization of the returned signals to provide retroreflection of impinging signals while maintaining the same sense of polarization. The array thereby provides enhancement of the radar cross-section of a target when circularly polarized radar is employed. Conversely, the array can be connected so as to enhance opposite-polarization returns should there be any desire to do so.

REFERENCES:
patent: 3757343 (1973-09-01), Bogner
Panasiewicz, J. J., "Enhancement of Aircraft Radar Return by Use of Airborne Reflectors and Circular Polarization", IRE Convention Record, vol. 4, pt. 8, pp. 89-96, 1956.

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