A Compact Super Wideband Antenna for Wireless Communications

Abstract

In this paper, a novel Super Wide Band antenna which comprises of Apollonius fractal with nested Apollonius circles is proposed. A ground plane which is loaded with a pair of semicircular notches and a rectangular notch is used to enhance the impedance bandwidth. A tapered microstrip feed line is employed to improve the impedance matching at higher frequencies. The overall volume of the antenna is $19\times 31\times 1.6mm^{3}$. The achieved impedance bandwidth is 3–60GHz for $\text{VSWR} < 2$. Promising peak gain, stable and nearly omnidirectional radiation patterns are obtained in the entire bandwidth. The proposed antenna is better in terms of compactness, bandwidth and peak gain over the previously reported antennas in the literature.