Ultrawideband slotted semicircular patch antenna

A compact ultrawideband microstrip patch antenna fed by a coplanar waveguide (CPW) and a microstrip line is presented in this article. The performance between these two feeds on the return loss bandwidth is compared. The radiation pattern stability of the antenna is also investigated. The measured impedance bandwidth of CPW fed and microstrip line fed patch antennas is from 3 to 18 GHz and 2 to 13 GHz (146.67%), respectively. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:362–369, 2014