A Compact Printed Extremely Wideband Microstrip Patch Antenna with Stacked Configuration

A common technique to realize wideband microstrip antenna is by introducing slots at an appropriate position inside the patch. In this communication a stacked configurated microstrip patch antenna with slots similar to ISI shape introduced on a square radiating patch with a microstrip line feed is presented. The slots introduced in the radiating patch of the proposed antenna increase the fringing fields which enhances the bandwidth. In order to achieve wider bandwidth an air gap is used between the driven and the parasitic patches. The results were validated by measurements in the laboratory. The impedance bandwidths determined at -10 dB return loss for the proposed antenna is about 90.65% (1.088 to 2.892 GHz). The effects of key design parameters such as air gap, length of microstrip line, dimensions of the parasitic patch are studied to optimize for the better performance of the designed