Patent ID: 8125752

Claim:
A high voltage surge protection device having a characteristic impedance, the device comprising: a center conductor defining an axis; an electrically conductive outer body disposed in surrounding relation to the center conductor; a dielectric layer disposed between the center conductor and the outer body; an electrically conductive surge protective element having a first value of effective impedance, the surge protective element disposed in electrical contact with the outer body and in spaced-apart relationship with the center conductor, the spaced-apart relationship forming a gap between the center conductor and the electrically conductive surge protective element; an insulative tuning element having a second value of effective impedance larger than the first value of effective impedance, the tuning element being coupled to the surge protective element in impedance-restorative relationship; and wherein the combination of the first value of effective impedance and the second value of effective impedance effectively equals the characteristic impedance of the high voltage surge protection device.