An Ultra-wideband Dual Frequency Notched Circular Monopole Antenna for Ground Penetrating Radar application

A compact printed ultra-wideband (UWB) antenna of dimension 35x30x0.8 mm3 that provides wide impedance band from 2.78 to 16.58 GHz with dual frequency stop bands at 3.3-3.81 and 5.05-5.52 GHz to eliminate WiMAX and lower WLAN interferences is proposed in this article. The antenna also provides monopole like radiation pattern with an average radiation efficiency of about 87% and gain variation of 2-5 dBi in its pass bandwidth. One possible application of the proposed antenna could be found in ground penetrating radar (GPR) to scan thin sub surfaces as it can provide better lateral resolution due to very wide impedance bandwidth. The proposed antenna performance is simulated in close proximity of dry soil and wood test bed that has thickness of half inch and it is found that the antenna transfer function and group delay responses are stable in the 3.1-10.6 GHz UWB except the dual notch bands.