NDLI: Flat-Lens Design Using Field Transformation and Its Comparison With Those Based on Transformation Optics and Ray Optics

Content Provider	IEEE Xplore Digital Library
Author	Jain, S. Abdel-Mageed, M. Mittra, R.
Copyright Year	2002
Abstract	This letter proposes a technique for designing flat lenses using field transformation (FT), as opposed to ray optics (RO) or transformation optics (TO). The lens design consists of 10 layers of graded index dielectric in the radial direction and 5 layers in the longitudinal direction. The central layer in the longitudinal direction primarily contributes to a bulk of the phase transformation, while the other four layers, above and below this middle layer on either side, act as matching layers that help reduce the reflections introduced by the impedance mismatch at the interfaces of the middle layer. The letter compares the performance of the lens, so designed, to those based on the RO and TO techniques. We show that the proposed lens design using FT is broadband, has a better than 1 dB higher gain compared to the RO- and TO-based designs over a wider frequency band, and that its scan capability is superior as well.
Sponsorship	IEEE Antennas and Propagation Society
Starting Page	777
Ending Page	780
Page Count	4
File Size	910769
File Format	PDF
ISSN	15361225
Volume Number	12
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	zone plate lens Field transformation flat lens graded index lens multilayered lens transformation optics
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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