A Compact Dual Band Printed Monopole Antenna

Abstract

In this paper, a microstrip line fed dual band printed monopole antenna for applications in WLAN, HiPERLAN, HisWaNa and WiMAX is presented.The presented antenna, occupying a compact size of 25×18 mm 2 embodies a simple microstrip line fed rectangular patch and a partial rectangular ground plane defected with small U shaped slot.The small U shaped slot having an area of only 3×4 mm 2 is introduced in the ground plane to obtain dual frequency operation with broad operating bandwidth.The antenna is fabricated on FR-4 substrate of thickness 1.585 mm and relative permittivity 4.4.The measured result shows dual band operation with wide 10 dB impedance bandwidths of 680 MHz (2.92-3.6GHz) and 2300 MHz (4.12-6.42GHz) which covers the bandwidth requirements of 5.2/5.8GHz WLAN, 5 GHz HiPERLAN, 3.5/5.5GHz WiMAX and 5.2 GHz HisWaNa application bands.