A single feed compact square microstrip antenna is proposed in this paper. Two L slits are introduced on the right edge of the patch to study the effect of the slit on radiation behavior with respect to a conventional microstrip patch. An extensive analysis of the return loss, radiation pattern and efficiency of the proposed antenna is shown in this paper. For the optimize value of the slit parameters antenna resonant frequencies are obtained at 2.16, 2.68,3.22&4.37 GHz with corresponding bandwidth 11.02 MHz, 13.07 MHz, 35.86 MHz , 48.56 MHz and return loss of about -23.4,-15.2,-30.6&-20.3 dB respectively. For the lowest esonant frequency (2.16 GHz) the size of the antenna has been reduced by 71.14 % when compared to aconventional rectangular microstrip patch. Thecharacteristics of the designed structure are nvestigated by using MoM based electromagnetic solver, IE3D. The simple configuration, low profile nature, reduced size and quad band characteristics of the proposed antenna makes it suitable to operate in the frequency ranges of 2.
A single feed compact rectangular microstrip antenna is presented in this paper. Two L slots are introduced at the edge of the patch to reduce the resonant frequency. The antenna size has been reduced by 71.14 % when compared to a conventional square microstrip patch antenna with a maximum of 48.56 MHz bandwidth and –30.6 dB return loss. The characteristics of the designed structure are investigated by using MoM based electromagnetic solver, IE3D. An extensive analysis of the return loss, radiation pattern and efficiency of the proposed antenna is shown in this paper. The simple configuration and low profile nature of the proposed antenna leads to easy fabrication and make it suitable for the applications in Wireless communication system. Mainly it is developed to operate in the WiMax frequency range of 2.5-2.69 GHZ & 3.2- 3.8 GHz.