A Compact Triple-Band Rectangular Microstrip Patch Antenna by Using Circular Slits for Wireless Communication

This paper presents the design and characteristics of rectangular microstrip patch antenna, printed on FR-4 epoxy substrate. In this paper the concept of design technique of the triple-band small antenna, which covers IMT (3.84 ? 4.00 GHz)/ WLAN (5.06 ? 5.25 GHz) and (5.75 ? 5.89 GHz) bands respectively. The two circular slits are etched on the radiating patch, and the broadband characteristic are obtained by optimizing the dimensions of antenna [4] [5]. The triple resonant frequencies are obtained by optimizing the slit diameter at various locations. The proposed antenna is simulated using CST V.12 microwave studio, and the performance of the antenna parameters are measured and characterized in the terms of return loss, gain, bandwidth, radiation pattern and surface current distribution at the resonant frequencies respectively. The simulated results confirmed by the successful design, using 50? inset strip feed line of microstrip antenna for IMT and WLAN applications