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A planar UWB antenna based on MB-OFDM applications with switchable dual band-notched for cognitive radio systems

Published online by Cambridge University Press:  15 October 2014

Vahid Sharbati ,
Pejman Rezaei ,
Ali Shahzadi  and
Mohammad M. Fakharian
Vahid Sharbati*
Affiliation:
Faculty of Electrical and Computer Engineering, Semnan University, Semnan, Iran. Phone: +98 9113703981
Pejman Rezaei
Affiliation:
Faculty of Electrical and Computer Engineering, Semnan University, Semnan, Iran. Phone: +98 9113703981
Ali Shahzadi
Affiliation:
Faculty of Electrical and Computer Engineering, Semnan University, Semnan, Iran. Phone: +98 9113703981
Mohammad M. Fakharian
Affiliation:
Faculty of Electrical and Computer Engineering, Semnan University, Semnan, Iran. Phone: +98 9113703981
*
Corresponding author: V. Sharbati Email: [email protected]
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Abstract

In this paper, a switchable antenna with capability to operate in ultrawideband (UWB) frequency from 3 to 10.7 GHz with two switchable notch bands of 3.3–3.7 and 3.7–4.2 GHz, is presented for cognitive radio (CR) and multiband orthogonal frequency-division multiplexing (MB-OFDM) applications. The proposed antenna has a simple structure and compact size of 17 × 24 mm2. The antenna in the UWB characteristics is obtained using a circular radiator patch with an embedded T-slot on the patch and a rectangular parasitic element that is attached to the patch. The reconfigurability is also achieved by two L-shaped parasitic elements placed in the left and right of the patch that two ideal switches is inserted over the these elements and the circular patch. The function of the antenna can be changed by tuning status of the switches that make the notch bands in application frequencies. The measurement and simulation results show that the antenna has good characteristics for CR application and MB-OFDM, where the UWB antenna is required for spectrum sensing and the switchable band rejection antenna is used for reconfigurable operation.

Keywords

Cognitive radio (CR) antennaBand-notched ultrawidebandMultiband-OFDMSwitchable antenna
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 8 , Issue 1 , February 2016 , pp. 95 - 102
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2014 

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