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International Journal of Antennas and Propagation
Volume 2013 (2013), Article ID 358704, 7 pages
Research Article

IFA and PIFA Size Reduction by Using a Stub Loading

1Instituto Politecnico Nacional, SEPI-ESIME Zacatenco, U. P. Adolfo Lopez Mateos, 07738 Mexico City, DF, Mexico
2Universitat Politecnica de Catalunya, Department of Signal Theory & Communications, Remote Sensing Lab, 08034 Barcelona, Spain
3CINVESTAV-IPN, Telecommunications Section, San Pedro Zacatenco, 07360 Mexico City, DF, Mexico

Received 5 June 2013; Revised 22 August 2013; Accepted 10 October 2013

Academic Editor: Z. N. Chen

Copyright © 2013 Jose Alfredo Tirado-Mendez 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.


A proposed technique for size reduction of a conventional inverted-F antenna (IFA) and a planar inverted-F antenna (PIFA) by employing a reactive load generated by a short-circuited stub is presented. The reduction factor of both antennas is around 30%, and the main parameters of the devices are preserved, including a fractional bandwidth of 4% and a gain of −2 dB. Both antennas operate around 1.5 GHz.