Postcard Shaped Super Wideband Antenna with High BDR

Abstract

The design of a compact postcard-shaped antenna is presented for super wideband performance. The top side of the proposed antenna comprised of a modified rectangular patch, while an optimized partial ground plane with stair-shaped slots is designed on the bottom side, which helps to improve the impedance matching in the desired frequency range. The overall size of the antenna is 20 × 20 mm2. An impedance bandwidth of 27.25 GHz is observed starting from 2.75 GHz up to more than 30 GHz. Furthermore, the proposed antenna offers a fractional bandwidth of 166.4 %, a ratio bandwidth of 10.9: 1, and a bandwidth dimension ratio (BDR) of 5136. In addition, the observed peak gain of the proposed antenna is ∼ 5.56 dBi with an average gain of ∼ 3.4 dBi for the operating frequency range.