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Design and performance of a perforated dielectric Fresnel lens

Design and performance of a perforated dielectric Fresnel lens

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A phase-compensating Fresnel lens using a perforated dielectric material has been designed and fabricated. The perforations in the dielectric material were designed to create the zones of different dielectric constants needed to obtain proper phase compensation in a Fresnel lens. A prototype lens designed to operate at 30 GHz was fabricated, and consisted of zones with four different synthesised values of dielectric constant. The 15 cm diameter lens had a peak gain of 28 dBi, resulting in an aperture efficiency of 33%.

Inspec keywords: dielectric bodies; lens antennas; microwave antennas; antenna radiation patterns; permittivity

Other keywords: phase-compensating lens; 30 GHz; perforated dielectric lens; perforated dielectric Fresnel lens; 15 cm; prototype antennas; radiation patterns; dielectric constant; 28 dB; lens antennas

Subjects: Single antennas

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