Abstract
A new single layer simple probe feed asymmetrical koch fractal dual band microstrip patch antenna (MSA) is proposed for ISM band (2.4 and 5 GHz) applications. To achieve circular polarization (CP) and dual band resonance, koch fractal curves are embedded on sides of square patch. The radiating cross bisected antenna resonates at ISM band. Without increasing structural complexity, improvement in bandwidth is achieved. Proposed design fulfils requirements of IEEE 802.11a/b/g standards. The measured 3-dB axial ratio bandwidth is 3.48% (2.4–2.485 GHz) and 12.31% (5.15–5.825 GHz) and 2-dB VSWR bandwidth is 6.1% (2.35–2.5 GHz) and 15.55% (5.10–5.96 GHz) respectively at center frequency of 2.45 GHz and 5.5 GHz. Experimental results show perfect match between simulated and measured bandwidths.
Published Version
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