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Flat Luneburg Lens via Transformation Optics for Directive Antenna Applications.
- Source :
-
IEEE Transactions on Antennas & Propagation . Apr2014 Part 2, Vol. 62 Issue 4, p1945-1953. 9p. - Publication Year :
- 2014
-
Abstract
- The great flexibility offered by transformation optics for controlling electromagnetic radiation by virtually re-shaping the electromagnetic space has inspired a myriad of dream-tailored electromagnetic devices. Here we show a 3D-transformed microwave Luneburg lens antenna which demonstrates high directivity, low side-lobe level, broadband response and steerable capabilities. A conventional Luneburg lens is redesigned accounting for dielectric materials that implement a coordinate transformation, modifying the lens geometry to accommodate its size and shape for easy integration with planar microwave antenna applications. An all dielectric lens is manufactured following a thorough holistic analysis of ceramic materials with different volume fractions of bi-modal distributed titanate fillers. Fabrication and measurements of a 3-D flat Luneburg lens antenna validate the design and confirm a high-directivity performance. A directivity of 17.96 dBi, low side-lobe levels for both main planes \sim -26~dB, excellent directivity performance within the X-band and beam-steering up to 34^\circ were achieved. [ABSTRACT FROM PUBLISHER]
Details
- Language :
- English
- ISSN :
- 0018926X
- Volume :
- 62
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Antennas & Propagation
- Publication Type :
- Academic Journal
- Accession number :
- 95635256
- Full Text :
- https://doi.org/10.1109/TAP.2014.2302004