Design and analysis of a compact WiMAX and WLAN band notched planar monopole antenna for UWB and bluetooth applications

In this manuscript, a compact UWB with dual band-notched planar monopole antenna is investigated. The band notched characteristics at WiMAX and WLAN is obtained by connecting two pairs of stubs to the modified ground plane. The size of proposed antenna is 25(W) x 30(L) x 1.6(H) mm(3) which consists of a fork shaped structure as a main radiating element and excited with a 50-omega microstrip line. The proposed antenna covers Bluetooth frequency band (2.4-2.48 GHz) along with UWB spectrum without increasing the size of the antenna. The measured operating frequency of the proposed antenna is from 2.4 to 12.8 GHz along with WiMAX and WLAN band-notched. Moreover, the measured gain of the proposed antenna varies between 2 and 6 dBi except notched band. At notched frequencies, it is -1 and -6 dBi at WiMAX and WLAN, respectively. The total antenna efficiency varies from 80% to 95% except notched frequency bands. The radiation patterns and time domain characteristics are also analyzed and found suitable for the modern UWB applications. Finally, a prototype of dual band-notched antenna is manufactured and its characteristics are measured using network analyzer. The simulated and measured results are found in close agreement.