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Electromagnetic analysis of active radar absorbers

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4 Author(s)
Kaleeba, P.N. ; Dept. of Electron. & Electr. Eng., Univ. of Sheffield, UK ; Tennant, A. ; Chambers, B. ; Idez, J.P.

The details of an experimental active radar absorber have been presented. The absorber is based on the topology of a Salisbury screen but uses an active impedance layer to provide reflectivity tuning. The active impedance layer is a FSS controlled by semiconductor pin diodes. Measured reflectivity characteristics have been presented and compared to predictions obtained from a simple equivalent circuit transmission line model. The structure has also been analysed using the Ansoft HFSS electromagnetic simulator software in which the diode has been modelled by a small planar slab of material with variable surface impedance. This model provides superior result to the transmission line model in predicting the resonance frequencies of the FSS.

Published in:

Antennas and Propagation Society International Symposium, 2003. IEEE  (Volume:4 )

Date of Conference:

22-27 June 2003