A Wide-Band Single-Layer Aperture-Coupled Microstrip 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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Herscovici, Naftali; Tomasic, Boris (Air Force Research Laboratory, Sensors Directorate, Hanscom AFB, Bedford MA, USA)
Ginn, James (University of Central Florida, Orlando FL, USA)
Donisi, Tony (Ansoft Corporation, Pittsburgh, PA, USA)

In this paper a new type of a wideband aperturecoupled microstrip antenna is presented. The antenna is modelled as a 2.5D structure, and is optimized using a Genetic Algorithm (GA). In addition to the radiator shape, the feed and the coupling slot dimensions are also included in the optimization process. The impedance bandwidth corresponding to VSWR<2:1 achieved by this optimization for the microstrip fed case is slightly larger than 38% and slightly above 20% for the stripline fed case. In order to achieve this bandwidth with traditional aperture-coupled patch, a multilayer patch structure is required. The concept proposed here, considerably reduces the complexity of the fabrication process.