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International Journal of Antennas and Propagation
Volume 2014, Article ID 793191, 10 pages
Research Article

Dual-Band Compact Planar Antenna for a Low-Cost WLAN USB Dongle

1Military Institute of Engineering, 22290-270 Rio de Janeiro, RJ, Brazil
2Grenoble Institute of Technology, 38000 Grenoble, France
3Fraunhofer Institute for Integrated Circuits, 90411 Nuremberg, Germany

Received 4 February 2014; Revised 18 April 2014; Accepted 21 April 2014; Published 28 May 2014

Academic Editor: Yingsong Li

Copyright © 2014 Maurício Henrique Costa Dias 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.


Among the present technologies for WLAN devices, USB dongles still play a noticeable role. One major design challenge regards the antenna, which unavoidably has to comply with a very small volume available and sometimes should also allow multiband operation. In this scope, the present work discusses a dual-band WiFi compact planar IFA-based antenna design for a low-cost USB dongle application. Like most of the related published solutions, the methodology for deriving the present proposition was assisted by the use of an antenna analysis software. A prototype was assembled and tested in order to qualify the radiator design. Practical operation conditions were considered in the tests, such as the influence of the dongle case and the effect of the notebook itself. The results complied with the design constraints, presenting an impedance match quite stable regardless of the stick position alongside a laptop base.