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International Journal of Antennas and PropagationVolume 2013 2013, Article ID 694819, 8 pages

Application ArticleEMC Lab, School of Electronic and Information Engineering, Beihang University, Beijing 100191, China

Received 7 December 2012; Revised 2 May 2013; Accepted 29 May 2013

Academic Editor: Renato Cicchetti

Copyright © 2013 Junjun Wang and Xudong He. 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.


A compact multiband printed monopole antenna is presented. The proposed antenna, composed of a modified broadband T-shaped monopole antenna integrating some band-notch structures in the metallic patch, is excited by means of a microstrip line. To calculate the bandwidth starting frequency BSF of the T-shaped broadband antenna, an improved formula is proposed and discussed. The multiband operation is achieved by etching three inverted U-shaped slots on the radiant patch. By changing the length of the notch slots, operation bands of the multiband antenna can be adjusted conveniently. The antenna is simulated in Ansoft HFSS and then fabricated and measured. The measurement results show that the proposed antenna operates at 2.25–2.7 GHz, 3.25–3.6 Hz, 4.95–6.2 GHz, and 7-8 GHz, covering the operation bands of Bluetooth, WiMAX, WLAN, and downlink of X-band satellite communication system and thus making it a proper candidate for the multiband devices.

Autor: Junjun Wang and Xudong He



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