A Compact Tri-band Monopole Antenna with Multiple Meander Lines for WLAN and WiMAX Communication Applications

摘要

In this paper, a compact tri-band monopole antenna with three meander lines is proposed and investigated for wireless local area networks (WLANs) and worldwide interoperability for microwave access (WiMAX) applications. The designed tri-band antenna is realized by using three meander line structures that are connected to the 50-Ohm microstrip feed signal line to generate the desired triple resonance frequencies. By adjusting the dimensions of the proposed three meander lines, the expected resonant frequencies can be tuned for WLAN and WiMAX communication applications. The simulation results demonstrate that the optimized tri-band monopole antenna can give three impedance bandwidth for S_(11) ≤ -10dB of 156MHz (2.39-2.55GHz), 450 MHz (3.30-3.75GHz) and 730MHz (5.14-5.87GHz), which can be applied to cover both 2.4/5.2/5.8-GHz WLAN bands and 3.5/5.5-GHz WiMAX bands. Furthermore, omnidirectional radiation patterns can be achieved, which make the designed tri-band monopole antenna promising for integrating into modern portable devices.