Double-sided split-step MM-wave Fresnel lenses: design, fabrication and focal field measurements

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Yurchenko V. B., Ciydem M., Gradziel M., Murphy J. A., Altintas A.

JOURNAL OF THE EUROPEAN OPTICAL SOCIETY-RAPID PUBLICATIONS, cilt.9, 2014 (SCI-Expanded, Scopus)

Özet

Design, fabrication and focal field measurements of W-band Fresnel lenses to produce well-shaped Gaussian beams in the focal domain are presented. Two lenses, one of Teflon and another of Polyamide, have been compared in their performance with a double-sided Fresnel lens of different design, with full height of Fresnel steps. Experiments show that a good focusing ability of all the lenses is achieved. They produce the target beam according to the design. Yet, the lenses of split-step design are thinner, have lower insertion losses, and a greater focal depth as compared to more conventional Fresnel lenses.