1 October 1991 Recent developments in Fresnel zone plate antennas at millimeter wavelengths
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Proceedings Volume 1576, 16th International Conference on Infrared and Millimeter Waves; 15766Y (1991) https://doi.org/10.1117/12.2297963
Event: 16th International Conference on Infrared and Millimeter Waves, 1991, Lausanne, Switzerland
Abstract
The Fresnel zone plate antenna has seen further development in the recent past. Analytical results and measured data have been obtained at various frequencies to describe the efficiency, bandwidth, far-field pattern, and focal-region and off-axis behavior. Both transmission (i.e., lens-like) and reflective configurations have been used [1,2]. Horn antennas have typically been used as feeds, but recent measurements at 220 GHz have utilized a dipole (or an array of dipoles) for a feed [3,4]. Off-axis feed methods have recently been developed for reflective zone plates (of elliptical cross-section). This arrangement can produce a better far-field pattern (lower sidelobes), because the feed blockage is reduced.
© (1991) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
James C. Wiltse, James C. Wiltse, } "Recent developments in Fresnel zone plate antennas at millimeter wavelengths", Proc. SPIE 1576, 16th International Conference on Infrared and Millimeter Waves, 15766Y (1 October 1991); doi: 10.1117/12.2297963; https://doi.org/10.1117/12.2297963
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