Title :
A printed CPW-fed slot-loop antenna with narrowband omnidirectional features
Author :
Shynu, S.V. ; Ammann, M.J.
Author_Institution :
Sch. of Electron. & Commun. Eng., Dublin Inst. of Technol., Dublin
fDate :
6/1/2009 12:00:00 AM
Abstract :
The design of a novel CPW-fed printed slot-loop antenna with narrowband omnidirectional attributes is proposed. The antenna geometry is selected to reduce slot coupling, thus achieving both a narrow bandwidth and an omnidirectional radiation pattern simultaneously. A gain of 2.1 dBi is accomplished with high radiation efficiency. Very narrow fractional impedance bandwidths as low as 2.9 are realised with good omnidirectional radiation characteristics. A technique providing unconstrained control of the bandwidth in the range of 1.7 - 6.9% is described.
Keywords :
antenna feeds; antenna radiation patterns; coplanar waveguides; directive antennas; loop antennas; microstrip antennas; slot antennas; narrow fractional impedance bandwidth; narrowband omnidirectional feature; omnidirectional radiation pattern; printed CPW-fed slot-loop antenna geometry; slot coupling reduction;
Journal_Title :
Microwaves, Antennas & Propagation, IET
DOI :
10.1049/iet-map.2008.0198
