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Novel wideband slot antenna having notch-band function for 2.4 GHz WLAN and UWB applications

Published online by Cambridge University Press:  04 April 2011

Arumugam Chellamuthu Shagar  and
Shaik Davood Wahidabanu
Arumugam Chellamuthu Shagar*
Affiliation:
Department of Electronics and Communication Engineering, Anna University of Technology, Tiruchirappalli, Tamilnadu, India
Shaik Davood Wahidabanu*
Affiliation:
Department of Electronics and Communication Engineering, Anna University of Technology, Coimbatore, Tamilnadu, India
*
Corresponding authors: A.C. Shagar and R.S.D. Wahidabanu Emails: shagar_einstein@rediffmail.com, rsdwb@yahoo.com
Corresponding authors: A.C. Shagar and R.S.D. Wahidabanu Emails: shagar_einstein@rediffmail.com, rsdwb@yahoo.com
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Abstract

In this paper, the design, simulation, and fabrication of a novel printed rectangular slot antenna with a band-notched function suitable for 2.4 GHz wireless local area network (WLAN) and ultra-wideband (UWB) applications is presented and investigated. Two pairs of slits are introduced into the ground plane to realize band-notched function, by tuning the position, length, and width of which a suitable rejected frequency band can be obtained. To improve the impedance matching, a rectangular cut is also made in the ground plane so that the antenna can cover 2–12 GHz frequency range. According to the measured results, the proposed antenna has a large bandwidth totally satisfying the requirement of 2.4 GHz WLAN and UWB systems, while providing the required band-notch function from 5.1 to 5.9 GHz. The study of transfer function and time-domain characteristics also indicates the band-notched function of the antenna. The radiation patterns display nearly omni-directional performance and the antenna gain is stable except in the rejected frequency band (5.1–5.9 GHz). Moreover, group delays are within 1.5 ns except for the notch band. These features make it a promising candidate for UWB wireless applications. Details of this antenna are described, and the experimental results of the constructed prototype are given.

Keywords

Slot antennaWLAN/UWB operationNotch bandRectangular cutTime-domain characteristic
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 3 , Issue 4 , August 2011 , pp. 451 - 458
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2011

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