Abstract:In this paper, a compact-sized microstrip patch antenna of dimension 12×12×1.57 mm³ is presented for the Ku and K band applications.  Five slots along with notch, and defective ground are used to enhance the performance of the microstrip patch antenna by changing the current distribution in the radiating patch. The effect of every slot and notch is analyzed in terms of bandwidth, % bandwidth, return loss, and peak gain. The analysis is verified using the results of reflection coefficient, gain, radiation efficiency, etc. The proposed antenna work on two frequencies ranging from (15.9–16.6) GHz and (18.5–24.5) GHz with impedance bandwidth of 4.3 % and 27.9 % respectively. The proposed antenna having 11 dBi gain is applicable for satellite communication, 5G application, and radar applications. The modeling and simulation of microstrip patch antenna are performed on Ansoft HFSS software and measurement of the fabricated antenna is done by VNAN5247A.

Keywords: UWB patch antenna, the effect of slots and notches, returnloss, gain, radiation efficiency, group delay, etc.