Abstract
ABSTRACTIn this letter, a novel spiral shape for electromagnetic bandgap structure (EBG) is presented for array structure. By implementation of the spiral formation, the inductance of the EBG unit cell will be increased and the unit cells are compacted around 36% for 3.6 GHz in comparison to conventional EBG unit cells. The prototype model of unit cells is used for 2 × 2 element microstrip patch array antenna with slot feed for improving the radiation gain of the antenna by reducing the mutual coupling effect of the antenna. Suppression of surface waves using EBG has improved the gain about 1.2 dB. Finally, an antenna prototype was fabricated and tested. Good agreement between simulation and measurement is obtained that verified the performance of the proposed structure. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2084–2088, 2016
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