This paper presents the
tri-band slot loaded patch antenna for mobile communication. The antenna
consists of parallel slots loaded circular disk with defected ground structure
antenna (DGS). The antenna without DGS, acts like wide band antenna and
bandwidth is 34.45% (3.47 - 4.92 GHz) with maximum gain of 4.97 dBi, which can
be used in WiMax application. This structure has the following advantages: 1) co-axial
feeding technique, which is very simple as compared to other feeding technique,
2) simple and cost effective and 3) it is more efficient than the antenna
without DGS. This antenna has been analyzed using IE3D simulation software.
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