A Multi-Band Antenna Design for WLAN and WiMAX Communication Protocols

To meet the requirement of multi-band transmitssion in wireless communication systems, a compact broadband dual-band antenna is designed for the WLAN and WiMAX frequency bands in this paper. The antenna mainly consists of a rectangular ring and two tridents. Good impedance match is obtained in the operating frequency bands by adding an arch structure with circular defects on the ground plane, forming a defective ground. In order to obtain the miniaturized size of the structure, operating frequency bands with good impedance match are optimized by using parameter scanning. The antenna has the advantages of good radiation performance, wide frequency band, high gain, as well as small size and simple structure. Experiment results have been verified our design. The antenna covers very well over the WLAN and WiMAX all frequency bands.