International Journal of Antennas and Propagation 
Volume 2008 (2008), Article ID 790358, 6 pages
doi:10.1155/2008/790358
Research Article

Global Synthesis Method for the Optimization of Multifeed EBG Antennas

Julien Drouet, Marc Thevenot, Régis Chantalat, Cyrille Menudier, Majed Koubeissi, Thierry Monédière, and Bernard Jecko

 XLIM Laboratory, University of Limoges, Limoges 87060, France
Received 19 March 2008; Revised 9 July 2008; Accepted 15 August 2008

Recommended by Karu Esselle

Abstract

This paper presents a novel technique for synthesizing a given radiation pattern from an EBG antenna with an array feed. The method determines the optimum sets of input waves and input impedances for the feed ports in order to perform simultaneously the radiation pattern and the impedance matching of all the radiating probes that form the array feed. The method is validated through a numerical design of an EBG antenna excited with four patch antennas. The structure is designed to radiate with a single lobe scanned at θ=30∘ in the E-plane. The interactions between each patch inside the EBG resonator are characterized with the CST MWS software. The optimum weights and the input impedances which simultaneously perform the objective radiation and the matching of all feeding ports are calculated by the developed global synthesis method. The feed network is designed with the Agilent ADS software in order to perform the specified weights and the impedances matching.