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Effective dielectric constant and design of sliced Lüneberg lens
Author(s) -
Zouganelis Georgios,
Budimir Djuradj
Publication year - 2007
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.22751
Subject(s) - dielectric , microwave , slab , optics , materials science , finite difference time domain method , plane wave , ground plane , lens (geology) , computational physics , condensed matter physics , physics , optoelectronics , engineering , electrical engineering , antenna (radio) , structural engineering , quantum mechanics
In this article, a design of Lüneberg lens with slices made from low loss dielectric material with hemispherical air‐holes drilled appropriately on the top and bottom surface of each of them is presented. A formula to estimate the values of radial dependent effective dielectric constant of air‐holes dielectric composite material is suggested. The estimated values are compared with the ones calculated from finite difference time domain method electromagnetic simulations of a periodic lattice of spherical and cylindrical air‐holes embedded in a dielectric slab using Nicolson–Ross method. Calculation of S‐parameters and near field of lens with hemispherical air‐holes under an incident plane wave, using estimated effective constants by the suggested formula are compared with ones using precise theoretical values of dielectric constants. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 2332–2337, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22751