Bluetooth ultra-wideband antenna with reconfigurable notch characteristics

A Bluetooth ultra-wideband monopole antenna with reconfigurable notch characteristics mainly comprises a dielectric substrate 1, coplanar waveguide earth plates 2, a micro-strip radiation surface-mounted device 3 and coplanar waveguide feeders 4. The coplanar waveguide earth plates, the feeders and the micro-strip radiation surface-mounted device are all printed on the upper surface of the dielectric substrate. A T-shaped micro-strip resonant branch 31 is added to the top end of the micro-strip radiation surface-mounted device 3 to enable the ultra-wideband antenna to operate in a Bluetooth frequency band (2.4GHz) and generate the notch characteristics in a WiMAX (worldwide interoperability for microwave access) frequency band (3.3-3.8GHz). The two coplanar waveguide earth plates 2 are provided with two symmetrical L-shaped grooves 21 and 22 to enable the antenna to have the notch characteristics in a WLAN (wireless local area network) frequency band (5.15-5.825GHz). Two PIN diode switches 23 and 24 are added to symmetrical positions of the L-shaped grooves and driven to on and off under external bias voltage to enable reconfigurability of the notch characteristics of the antenna in the WLAN frequency band.