Abstract
Defected ground structures (DGS) have been developed to improve characteristics of many microwave devices. In this paper, using FDTD method, effect of DGS to mutual coupling reduction of a two-element microstrip antenna array is investigated. The proposed DGS antenna is compared to other techniques and is shown to have an exceptionally lower mutual coupling between two E-plane coupled elements. Impact of the designed DGS on higher-order modes and radiation pattern of the antenna array is also examined.
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