The present invention is a grounded mast clamp current probe apparatus. The apparatus can have a current probe substantially enclosed by at least one housing. The housing forms an electrostatic shield that prevents passage of electricity to or from the current probe. A plurality of grounding elements are connected to the outer surface of the housing and radiate outwardly from the outer circumference of the housing. Each of the grounding elements radiates at a frequency angle θ, the angle formed between a longitudinal axis of the housing and a longitudinal axis of the grounding elements. The bandwidth and resonant frequency of the current probe is dependent on the frequency angle θ.
- Please contact for additional information