An Ultra-wideband Omnidirectional diople Antenna for Borehole Radar Application

In this paper, an ultra-wideband dipole antenna for borehole radar system is designed. By loading resistor and ferrite on the two arms of the dipole antenna to attenuate the current and expand the operation bandwidth, the bandwidth of 221-700MHz is achieved, and the relative bandwidth of the antenna is 104%. The time domain radiation waveform shows that the antenna has high peak-to-peak value of radiation signal and short tailing duration. Therefore, the antenna is suitable for borehole radar applications.