Abstract
This paper presents a monopole ultra-wideband (UWB) patch antenna that enhances bandwidth (BW) performance for super-wideband applications. The reference antenna (RA) has a modified circular radiator constructed from a circular patch integrated with two circular shapes at 5mm from the main patch center with radius of 5.35mm The modified patch is fastened on the top of a FR4-epoxy substrate dielectric material and fed by a microstrip type transmission line. A proper size partial ground plane has been developed on other side of the substrate. The evaluation of the proper dimension for all investigated antennas was done using the parametric study. Four different configurations with proper optimized dimensions were investigated: circular, drinking cup shape, torus, and rectangular, to modify the BW characteristics of the RA all the slots for investigated antennas were inserted in the top edge of the partial ground plane in the back of the feed line. to receive. The simulation results using CST-EM software package prove that the antenna fractional BW of the RA is 129.9% while for the four different antenna models are changing from 160.6% to 167.45%, that means that the proposed antennas BW increases from 31.7% to 37.55% The antenna maximum gain, directivity and far field radiation pattern also have been investigated.