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Abstract
This paper presents the experimental study and SPICE simulation of transmission lines without or with transient voltage suppressors (TVSs) radiated by a fast rise-time electromagnetic pulse. TVSs are usually attached to transmission lines to protect terminal loads from surge interferences. The currents of the terminal loads and TVSs are obtained experimentally and numerically by using the SPICE circuits of transmission lines and TVSs. The results show that the induced energy dissipated through one termination will become larger when a TVS is attached to the other termination of the transmission line. And experimental results reveal that TVSs can provide protection for the loads, but the protection effectiveness may be not enough against fast rise-time surges.