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An Integrated Ultra Wideband/Narrow Band Antenna in Uniplanar Configuration for Cognitive Radio Systems

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2 Author(s)
Augustin, G. ; Center for Energy, Materials and Telecommunications (EMT), National Institute of Scientific Research (INRS), University of Quebec, Montreal, Canada ; Denidni, T. A.

A unique combination of wide and narrow band antenna, utilizing uniplanar nature of coplanar wave guide, for category-A cognitive radio systems is presented. It is demonstrated that, the space between two tapered slots, which forms an ultra-wideband configuration, (where the surface current concentration is relatively low) can be efficiently utilized to integrate a narrow-band antenna. The ultrawideband (UWB) and narrow band (NB) antenna provides a 2:1 VSWR bandwidth from 2.6 GHz to 11 GHz and 4.9 GHz to 6.2 GHz, respectively, with a reasonable isolation between them. The measured radiation pattern and gain are suitable for cognitive radio applications, where a wideband antenna is required for spectrum sensing and a narrow band antenna for operation. Moreover, the measured time domain characteristics demonstrate that, the antenna is also a potential candidate for medical imaging and weapon detection systems which are connected to the host through high speed WLAN.

Published in:

Antennas and Propagation, IEEE Transactions on  (Volume:60 ,  Issue: 11 )

Date of Publication:

Nov. 2012

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