A CPW-Fed Antenna with the Elliptical-shaped forms on the patch for Bandwidth Enhancement

Abstract

This study presents a novel design of a printed elliptical-shaped antenna with coplanar waveguide (CPW) feed for multi-operating bands of
the wireless communication systems and ultra wideband (UWB) communication systems. shaped patch. By using of a pair of ellipse-shapecombined (ESC) form on the patch and halfThe radiator of the antenna is a slotted elliptical-ellipse-shaped slot inside initial patch, the proposed antenna can be
used in multiband wireless operations, covering the DCS (1.71–1.88 GHz), PCS (1.85–1.99 GHz), UMTS (1.92–2.17 GHz), 2.4-GHz WLAN
(2.4–2.484 GHz), Mobile-WiMAX( 2.5–2.69 GHz) and 5-GHzWLAN (5.15–5.825 GHz) bands. By inserting an ellipse-shape-combined (ESC)
form with variable dimensions on the patch, additional resonances are excited and hence much wider impedance bandwidth can be obtained,
especially at the higher band. The proposed antenna operates in the adopted bandwidth (3.1-10.6 GHz) with S11 < 10 dB, and covers it very well
between 1.65 and 20 GHz, which provides fractional bandwidths of more than 170 %. The antenna has a desirable S11 level, radiation pattern and
gain characteristics for multi-operating bands.