D.N. Black, James C. Wiltse
Abstract
Characteristics are given for Fresnel zone plates used as quasi-optical focusing or frequency-filtering elements at frequencies from 35 to 210 GHz. An analytical description of the far-field pattern has been developed. Design data, measured results are given for a new type of flat lens.
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Characteristics are given for Fresnel zone plates used as quasi-optical focusing or frequency-filtering elements at frequencies from 35 to 210 GHz. An analytical description of the far-field pattern has been developed. Design data, measured results are given for a new type of flat lens.
Key concepts: Fresnel zone antenna, Zone plate, Fresnel zone, Fresnel lens, Optics, Fresnel number, Millimeter, Extremely high frequency