A novel resistively loaded monocone was proposed to extend the application for electric field calibration. Electric field analysis and measurement were carried out to verify the design of the proposed monocone. As revealed by the results, the S-11 of the monocone feed was reduced from near 0 dB to below -17 dB in the low frequency. The measured electric waveform was also consistent with the excited pulse waveform after loading. The electric field uniformity was improved by resistive loading, and the maximum variation of the electric field was reduced to 1.3 dB from DC to 500 MHz along the given L-line, which suggests an enhancement when compared with the unloaded monocone. The analysis and measurement results demonstrate a possible potential for electromagnetic field calibration both in time and frequency domain in the future.