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Shadow blockage improvement using a perforated dielectric Fresnel lens

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3 Author(s)
Petosa, A. ; Commun. Res. Centre Canada, Ottawa, Ont., Canada ; Ittipiboon, A. ; Thirakoune, S.

Shadow blockage can lead to a significant reduction in the efficiency of grooved dielectric Fresnel lenses, especially for small values of F/D. This paper presents a multi-dielectric Fresnel lens which does not suffer from the effects of shadow blockage The lens is fabricated from a single dielectric sheet where perforations in the material are used to obtain the required dielectric constants. Measurements carried out at 30.5 GHz show nearly 1 dB gain improvement of the perforated dielectric Fresnel lens over a corresponding grooved lens.

Published in:

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

Date of Conference:

22-27 June 2003