Design of an AMC Plane for a Unidirectional, Low-profile Tulip-Loop antenna

Conference: EuCAP 2009 - 3rd European Conference on Antennas and Propagation
03/23/2009 - 03/27/2009 at Berlin, Germany

Proceedings: EuCAP 2009

Pages: 4Language: englishTyp: PDF

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Tanyer-Tigrek, F. Muge; Lager, Ioan E. (IRCTR (International Research Centre for Telecommunications-transmission and Radar), Delft University of Technology, Mekelweg 4, 2628 CD Delft, The Netherlands)
Mateos, Rosa M.; Craeye, Christophe (Communications and Remote Sensing Laboratory, Universite Catholique de Louvain, Batiment Stevin, Place du Levant, 2, B-1348, Louvain-la-Neuve, Belgium)

The ways of converting a wide band, electrically small in size, bi-directional quasi magnetic antenna into a unidirectional one are investigated. The purpose is to develop a magnetic wall parallel to the antenna which provides low-profile unidirectional designs, without sacrificing the bandwidth too much. Initial attempts to preserve the wide bandwidth caused some problems like pattern splitting at the broadside of the antenna and this problem has been solved by introducing an aperiodic AMC. An operational bandwidth for a VSWR = 2 of 44% in the X-band is achieved. The total height of AMC and the antenna is λ/6.2 at fmin and λ/4 at fmax.