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Planar monopole antennas for new generation mobile and lower band ultra-wide band applications

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8 Author(s)
C. H. See ; Electron. Commun. & Inf. Syst. Eng., Univ. of Bradford, Bradford, UK ; R. A. Abd-Alhameed ; F. Elmegri ; D. Zhou
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This study presents two multiband planar printed monopole antennas with an optimised size of 57×37.5×0.8×mm3 for mobile/wireless and low-band ultra-wide band (UWB) applications. Both these antennas are constructed as a chorded crescent-shaped radiator, a feed line and a defected ground plane. The experimental and computed results confirm that one design offers a wide usable impedance bandwidth of 114.3%, with a reflection coefficient %S11|||10|dB, over 1.5-5.5GHz. The other incorporates a tapered sickle-shaped slot in the radiator and demonstrates a band-suppression feature giving rejection of the worldwide interoperability for microwave access band (3.4-3.69GHz) where this is not required. The gains and far-field patterns of the antennas are presented and their group delay over the lower band UWB frequency range is also discussed.

Published in:

IET Microwaves, Antennas & Propagation  (Volume:6 ,  Issue: 11 )