Table of Contents
International Journal of Microwave Science and Technology
Volume 2015 (2015), Article ID 303215, 9 pages
Research Article

Design of UWB Planar Monopole Antennas with Etched Spiral Slot on the Patch for Multiple Band-Notched Characteristics

Department of Electronics & Telecommunication Engineering, Indian Institute of Engineering Science and Technology, Shibpur, Howrah 711 103, India

Received 7 June 2015; Revised 6 September 2015; Accepted 16 September 2015

Academic Editor: Mustapha C. E. Yagoub

Copyright © 2015 Swarup Das et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Three types of Ultrawideband (UWB) antennas with single, double, and triple notched bands are proposed and investigated for UWB communication applications. The proposed antennas consist of CPW fed monopole with spiral slot etched on the patch. In this paper single, double, and also triple band notches with central frequency of 3.57, 5.12, and 8.21 GHz have been generated by varying the length of a single spiral slot. The proposed antenna is low-profile and of compact size. A stable gain is obtained throughout the operation band except the three notched frequencies. The antennas have omnidirectional and stable radiation patterns across all the relevant bands. Moreover, relatively consistent group delays across the UWB frequencies are noticed for the triple notched band antenna. A prototype of the UWB antenna with triple notched bands is fabricated and the measured results of the antenna are compared with the simulated results.