Compact Dual-band Monopole Antenna for WLAN/WiMAX Applications

摘要

A novel, compact dual-band monopole antenna for WLAN and WiMAX applications is proposed in this paper. This antenna with a key-like slot is fabricated using a 0.8 mm-thick FR4 substrate, which only occupies a small area of 8(L) × 8(W) mm~2 to be easily embedded inside a portable device as an internal antenna. By properly designing the key-like slot etched on the radiator, two operating frequency bands covering 2.39-2.51 GHz and 4.57-5.99 GHz can be achieved with our antenna. The resonant properties of the antenna are also tunable while various lengths and widths of the slot are adopted. Nearly omnidirectional coverage with stable receiving performance for actual applications can be obtained due to the antenna. Simulated and measured results are performed and analyzed. With a compact size, the proposed monopole antenna may well work as an internal antenna in a portable device for WLAN/WiMAX operations.