Beveled-shaped super-wideband planar antenna

Abstract

In this paper, a design of beveled-shaped planar antenna has been presented for super-wideband applications.The proposed antenna consists of a beveled-shaped radiator, a tapered microstrip feed line, a partial ground plane, andtwo ground planes on the top side of the substrate. The top ground planes are used to match the impedance at lowerfrequencies and to minimize spurious radiations caused by the feed line. A tapered feed line has been utilized to enhancethe overall bandwidth of an antenna. It has been observed from results that a ratio bandwidth of 66.6:1 has been achievedfrom 0.3 to 20 GHz. Furthermore, the proposed antenna exhibits good radiation characteristics and offers acceptablegain in the entire bandwidth.