Design of Dual-band Microstrip antenna for WiMax and X band applications

While the major part of wireless communication industry is driven by the motto of `Small is Beautiful', all devices and processing units have been miniaturized owing to Moore's Law, except antennas. In an attempt to realize compact sized antennas, microstrip antennas have become a prominent and pleasing prospects for this purpose. While transrecieving antennas avoid the need of two separate antennas for transmission and reception, dual band antennas go one step ahead and operate in two bands there by avoiding individual antennas for each band. In this work, a Microstrip patch antenna for WiMax and X band wireless applications is proposed. The antenna shows the resonant behavior at 3.8 and 9 GHz with fractional bandwidths of about 159.2 MHz (3.713 GHz to 3.8722 GHz) for WiMax and 263.4 MHz (8.9053 GHz to 9.1687 GHz) for X band application. The significance of various performance parameters, of proposed antenna's is analyzed and discussed by various parametric study.