A compact microstrip patch antenna with five circular slots for wideband applications

Design of a compact microstrip patch antenna with five circular slots for wideband applications is presented in this paper. The proposed antenna is printed on both sides of a single substrate. On one side of square substrate, first a square patch is printed and then five circular slots are etched. On the other side of the substrate, a rectangular microstrip line is printed to feed the antenna. The antenna is simulated using high frequency structure simulation (HFSS) software and the optimal location and dimension of the slots and feed element are obtained. Further, the proposed antenna is fabricated on a glass epoxy FR-4 substrate. The proposed antenna has a wideband from 1.91GHz to 6.19 GHz with four resonant frequencies of 2.05 GHz, 2.86 GHz, 3.49 GHz and 5.11 GHz. The simulated and measured results are compared and these are in good agreement. The antenna can be used for wideband applications in frequency range from 1.91GHz to 6.19 GHz.