Abstract
This paper discusses the comparison of performance of conventional microstrip array antenna using two different types of two-dimensional electromagnetic bandgap structures. The electromagnetic bandgap structures employed are fork type and plus shape. Design of miniaturized and low-cost four-element microstrip array antenna with reduced mutual coupling is the main objective of this paper. The former and latter electromagnetic bandgGap structures produced miniaturization of 28.20 and 22.42%, respectively. Both the electromagnetic bandgap structures have accounted for considerable decrease in mutual coupling of conventional microstrip array antenna. The radiation characteristics of the modified array antenna depict a decrease in back lobe power. The array antennas are designed using Mentor Graphics IE3D simulation software. The experimental results are taken using vector network analyzer.
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