A Compact Printed UWB Notch Antenna with a slotted Radiating Element and
Split Ring Resonator for Application in Wireless Communication
Abstract
The design of a compact notch monopole antenna for application in
ultra-wide band frequency domain is presented. The enhanced impedance
bandwidth of the proposed antenna and a preliminary notch at 4.7 GHz are
obtained by creating the square slot in the circular radiating element,
an open ended slot is also created in the ground plane just below the
microstrip feed-line and an open ended slit ring in the thick protruded
stub erected from the upper portion of the square slot in the circular
radiating element. The tuning of the notch frequency of 5.5 GHz in the
WLAN band of 5-6 GHz as well as the further enhancement of notch is
obtained by embedding a split ring resonator (SRR) in the left side of
the microstrip feed line. The proposed UWB notch antenna provides the
impedance bandwidth of 3.097GHz to 13.326 GHz (fractional bandwidth of
125%). The average measured gain of the proposed antenna is 7.1 dBi
which covers the entire UWB band of operation except the notch band of
WLAN. The group delay is consistent at around 0.2ns in whole of the UWB
operating system except at the WLAN band where the measured group delay
is around 2.8ns.