A method to improve radiation efficiency by using a slot on a ground plane

In this letter, a planar inverted-F antenna with a slot on a ground is proposed to improve the antenna radiation efficiency at the CDMA band of 824–894 MHz. In this configuration, the electric fields are more confined to the inverted-F section and the end-point of the ground. The measured results show that the radiation efficiencies of the proposed antenna are improved by up to 16.8% and that the radiation patterns are similar to those of the antenna without a slot. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:3001–3003, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26401