DocumentCode :
1459414
Title :
Ultra-wideband circular slot antenna with reconfigurable notch band function
Author :
Kalteh, A.A. ; DadashZadeh, G.R. ; Naser-Moghadasi, M. ; Virdee, B.S.
Author_Institution :
Fac. of Eng., Sci. & Res. Branch, Islamic Azad Univ., Tehran, Iran
Volume :
6
Issue :
1
fYear :
2012
Firstpage :
108
Lastpage :
112
Abstract :
An ultra-wideband (UWB) antenna is presented whose frequency characteristics can be reconfigured electronically to have either a single- or dual-band notch function to block interfering signals from C-band satellite communications systems, IEEE802.11a and HIPERLAN/2 WLAN systems for example. The proposed antenna is excited using a circular ring resonator fabricated on one side of the dielectric substrate with a circular slot etched on the ground plane. To realise a single- or dual-band notch characteristic the antenna includes a semi-circular parasitic strip located above the circular ring, and a T-shaped stub is located near the inner edge of circular ring. The parasitic strip and T-shaped stub are connected to the circular ring via PIN diodes to give the antenna reconfigurable capability by configuring the PIN diodes in a prescribed combination of ON and OFF states. It is shown that there is virtually no change in the antenna´s E-plane and H-plane radiation patterns for the various PIN diode switching conditions. The proposed antenna´s performance has been verified by measurements.
Keywords :
antenna radiation patterns; p-i-n diodes; resonators; slot antennas; ultra wideband antennas; C-band satellite communications systems; HIPERLAN-2 WLAN systems; IEEE802.11a; PIN diode switching conditions; T-shaped stub; UWB antenna; antenna reconfigurable capability; circular ring resonator; dielectric substrate; dual-band notch function; frequency characteristics; radiation patterns; reconfigurable notch band function; semicircular parasitic strip; single-band notch function; ultrawideband circular slot antenna;
fLanguage :
English
Journal_Title :
Microwaves, Antennas & Propagation, IET
Publisher :
iet
ISSN :
1751-8725
Type :
jour
DOI :
10.1049/iet-map.2011.0125
Filename :
6159142
Link To Document :
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