Flat-base broadband multibeam Luneburg lens for wide-angle scan

References

• Ma HF, Cui TJ. Three-dimensional broadband and broad-angle transformation-optics lens. Nat. Commun. 2010;1:124–130.
   Google Scholar
• Driscoll T, Lipworth G, Hunt J, et al. Performance of a three-dimensional transformation-optical-flattened luneburg lens. Opt. Express. 2012;20:264–273.
   Web of Science ®Google Scholar
• Leonhardt U. Optical conformal mapping. Science. 2006;312:77–80.
   Web of Science ®Google Scholar
• Pendry JB, Schurig D, Smith DR. Controlling electromagnetic fields. Science. 2006;312:80–82.
   Web of Science ®Google Scholar
• Li J, Pendry JB. Hiding under the carpet: a new strategy for cloaking. Phys. Rev. Lett. 2008;101:901–904.
   Google Scholar
• Bosiljevac M, Casaletti M, Caminita F, Sipus Z, Maci S. Non-uniform metasurface luneburg lens antenna design. IEEE Trans. Antennas Propag. 2012;60:065–073.
   Google Scholar
• Jain S, Mittra R, Abdel-Mageed M. Broadband flat-base luneburg lens antenna for wide angle scan. In: IEEE Antennas and Propagation Society International Symposium (APSURSI); 2014 July; Memphis, TN; p. 771–772.
   Google Scholar
• Jain S, Mittra R. Field transformation approach to designing lenses. In: Mittra R, editor. Computational electromagnetics. New York (NY): Springer; 2014. p. 539–552.
   Google Scholar
• Luneburg RK. Mathematical theory of optics. Berkeley (CA): University of California Press; 1964.
   Google Scholar
• Koschny T, Markos P, Economou E, Smith D, Vier D, Soukoulis C. Impact of inherent periodic structure on effective medium description of left-handed and related metamaterials. Phys. Rev. B. 2005;71:105–111.
   Google Scholar
• Zhang Y, Mittra R, Hong W. On the synthesis of a flat lens using a wideband low-reflection gradient-index metamaterial. J. Electromagn. Waves Appl. 2011;25:178–187.
   Google Scholar
• Njoku C, Whittow W, Vardaxoglou J. Simulation methodology for synthesis of antenna substrates with microscale inclusions. IEEE Trans. Antennas Propag. 2012;60:194–202.
   Web of Science ®Google Scholar
• Hunt J, Kundtz N, Landy N, Smith DR. Relaxation approach for the generation of inhomogeneous distributions of uniformly sized particles. Appl. Phys. Lett. 2010;97:024104 ( pages 3).
   Google Scholar
• Liang M, Ng WR, Chang K, Gehm M, Xin H. An x-band luneburg lens antenna fabricated by rapid prototyping technology. In IEEE International Microwave Symposium; 2011 June; Baltimore, MD; p. 1–4.
   Google Scholar
• Wu Z, Ng WR, Gehm ME, Xin H. Terahertz electromagnetic crystal waveguide fabricated by polymer jetting rapid prototyping. Opt. Express. 2011;19:62–72.
   Google Scholar
• Wu L, Tian X, Ma H, Yin M, Li D. Broadband flattened luneburg lens with ultra-wide angle based on a liquid medium. Appl. Phys. Lett. 2013;102:103–106.
   Google Scholar
• Pfeiffer C, Grbic A. A printed, broadband luneburg lens antenna. IEEE Trans. Antennas Propag. 2010;58:3055–3059.
   Web of Science ®Google Scholar
• Kundtz N, Smith D. Extreme-angle broadband metamaterial lens. Nat. Mater. 2010;9:129–132.
   PubMed Web of Science ®Google Scholar
• Gu X, Jain S, Mittra R, Zhang Y. On the enhancement of angular resolution of a flat-base luneburg lens antenna by using correlation method. Prog. Electromagn. Res. M. 2014;37:203–211.
   Google Scholar
• Gu X, Jain S, Mittra R, Zhang Y. Doa estimation by using luneburg lens antenna with mode extraction and signal processing technique. Prog. Electromagn. Res. C. 2015;56:145–151.
   Google Scholar
• Gu X, Mittra R, Pelleti C, Jain S, Zhang Y. Performance enhancement of microwave subwavelength imaging and lens-type DOA by using signal processing techniques (invited paper). Prog. Electromagn. Res. 2014;147:203–226.
   Web of Science ®Google Scholar
• Gu X, Jain S, Mittra R, Zhang Y. Enhanced angular resolution for doa estimation by using a luneburg lens antenna with a waveguide array basement. In: URSI Atlantic Radio Science Conference; 2015 May; Gran Canaria. (accepted).
   Google Scholar
• Gu X, Jain S, Mittra R, Zhang Y. Doa estimation by using randomly distributed radar array with signal processing technique. In: URSI Atlantic Radio Science Conference; 2015 May; Gran Canaria. (accepted).
   Google Scholar