Triangular slot microstrip patch antenna for wireless communication

A single feed multi frequency compact rectangular microstrip antenna is presented in this paper. A triangular slot is introduced at the upper edge of the patch to reduce the resonant frequency A small piece of triangular patch is grown within the triangular slot to improve the gain bandwidth performance of the antenna. The antenna size has been reduced by 32.9% when compared to a conventional square patch with a maximum of 160 MHz bandwidth and -34 dB return loss Mainly it is developed to operate in the WiMax frequency range of 3.2-3.8 GHz with 26.67% bandwidth ratio.