A small integrated bluetooth and UWB antenna with WLAN band-notched characteristic

A small-sized, low-profile, and planar antenna for integrated Bluetooth and ultrawideband (UWB) applications is presented with WLAN band-notched. The proposed antenna is fed by a special microstrip line and it is built on PTFE(E
_r
=2.4) substrate with a whole size of 20mm*46mm. Besides, the overall size of the radiating element is 15mm*16mm. A semicircular slot resonator and a split ring slot resonator are embedded in the radiating patch for dual band-notched to reject the WLAN interference band. And a split rectangular ring filter also is coupled. The antenna can operate in the 2.25-2.5GHz and 3.0-10.75GHz frequency range that cover the Bluetooth (2.4-2.484GHz) and UWB (3.1-10.6GHz) with band-notched of 4.96-5.29 GH and 5.54-6.01GHz results.