Title :
Axisymmetric Resonant Lens Antenna With Improved Directivity in Ka-Band
Author :
Rolland, Anthony ; Ettorre, Mauro ; Boriskin, Artem V. ; Le Coq, Laurent ; Sauleau, Ronan
Author_Institution :
Inst. of Electron. & Telecommun. of Rennes (IETR), Univ. of Rennes 1, Rennes, France
fDate :
7/3/1905 12:00:00 AM
Abstract :
A compact-size shaped dielectric lens antenna (DLA) is designed and optimized in Kα-band (29.5 GHz) using a new synthesis tool based on the combination of a genetic algorithm and BoR-FDTD solver. The antenna is fabricated in Rexolite and fed by a circular waveguide with a flange and an optimized integrated dielectric taper. As demonstrated, the proposed antenna combines features intrinsic to lens, resonant, and reflector antennas. The attractive performance of the antenna (in terms of directivity and sidelobe level) is demonstrated numerically and experimentally by comparison to a conventional extended hemispherical DLA.
Keywords :
antenna feeds; circular waveguides; finite difference time-domain analysis; genetic algorithms; lens antennas; microwave antennas; reflector antennas; BoR-FDTD solver; Ka-Band; axisymmetric resonant lens antenna; bodies of revolution; circular waveguide; compact-size shaped DLA; compact-size shaped dielectric lens antenna; extended hemispherical DLA; finite-difference time-domain technique; frequency 29.5 GHz; genetic algorithm; optimized integrated dielectric taper; reflector antennas; resonant antennas; Dielectrics; Feeds; Finite difference methods; Lenses; Shape; Time domain analysis; Dielectric lens antenna (DLA); electromagnetic optimization; finite-difference time-domain technique for bodies of revolution (BoR-FDTD); shaped lens;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2011.2109931
