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Fresnel zone plate reflector incorporating rings

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2 Author(s)
Guo, Y.J. ; Dept. of Electr. Eng., Bradford Univ., UK ; Barton, S.K.

A novel high-efficiency Fresnel zone plate reflector antenna is presented. The reflector consists of an inhomogeneous array of circular conducting rings printed on a grounded substrate. By adjusting the geometrical parameters of the rings and the distances between them, the reflector provides a space-varying phase correction required for focusing an incoming plane wave. Compared with a phase reversal zone plate, an average of 3-dB gain improvement and significant sidelobe reduction have been obtained.<>

Published in:

Microwave and Guided Wave Letters, IEEE  (Volume:3 ,  Issue: 11 )