Analysis of transient voltage and currept in theload change of medium-wave radio transmitter

Abstract

When the load condition of the transmitter changes by the antenna-induced lightning surges, large transfent voltage and current which may damage the power devices occur in the transmitter. In this paper, we analyze them by computer simulation, and show that the load impedance seen from the power amplifier with antenna base sborted should be approximately equal (inductive load), or twice (capacitive load) to the abselute value of the matched load impedance.