An enhanced bandwidth planar inverted-F antenna with a modified shorting strip

Abstract

This article presents a novel design method for a wideband planar inverted F-antenna that simultaneously covers GSM900, GPS, DCSI800, IMT2000, WLAN, and DMB services. The proposed antenna consisted of a main patch with stubs, an I-shaped patch, and a modified shorting strip. It had dimensions of 16 X 36 X 6 mm(3). The dual band characteristic could be achieved by changing the length of a main patch. A very wide impedance bandwidth characteristic was obtained by optimizing the length of stubs, an I-shaped patch, and a modified shorting strip. Commercial electromagnetic software, CST Microwave Studio. was used to design the structure. The maximum gains at the frequencies of 915. 1576, 1785, 2170, 2400, and 2630 MHz were 1.0, 2.7. 5.4. 4.56 1.52, and 2.95 dBi, respectively. The overall radiation pattern was suitable for mobile applications.