Journal
OPTICS EXPRESS
Volume 19, Issue 21, Pages 19925-19934Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.19.019925
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Funding
- Office of Naval Research Global (ONRG) under Naval International Cooperative Opportunities (NICOP) [N00014-09-1-1013]
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Luneburg lens is a marvellous optical lens but is extremely difficult to be applied in any practical antenna system due to its large spherical shape. In this paper, we propose a transformation that reduces the profile of the original Luneburg lens without affecting its unique properties. The new transformed slim lens is then discretized and simplified for a practical antenna application, where its properties were examined numerically. It is found that the transformed lens can be used to replace conventional antenna systems (i.e. Fabry-Perot resonant antennas) producing a high-directivity beam with low side-lobes. In addition, it provides excellent steering capabilities for wide angles, maintaining the directivity and side-lobes at high and low values respectively. (C) 2011 Optical Society of America
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