Abstract
In this research, a low profile (12.5 × 18 mm2), easily tunable printed antenna consisting of λ/2 length M-shaped patch with rectangular and L-shaped strips (λ/2 length) that are fed by Asymmetric Coplanar Strip (ACS) is designed for WLAN and WIMAX applications. By varying the position of these λ/2 length simple structure radiating elements, three independent current paths can be produced which leads to generation of three independent resonant frequencies. The CST MWS simulated and VNA measured reflection coefficient (S11) results are compared and its analysis is presented along with its evolution stages, current distribution, smith chart, peak gain and radiation patterns properties. The −10 dB impedance operating bandwidths are about 140 MHz ranging from 2.41 to 2.55 GHz, 200 MHz from 3.45 to 3.65 GHz and 1700 MHz from 4.6 to 6.3 GHz respectively. Further, the developed structure can be easily integrated into advanced portable systems that support WLAN (2.4/5.2/5.8), 4.9 GHz US public safety and WIMAX (3.5/5.5) communication standards.
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