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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...
Two slot-coupled microstrip lines each with a finite size substrate are located on a distinct side of a large ground plane. They are analyzed using surface equivalence principle and multiple network theory (SEMN). Four-port scattering parameters are calculated and compared with experimental measurements which exhibit good comparison. This analysis is also used to model a slot fed microstrip antenna.
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