Numerical electromagnetic analysis of GSM tower under the influence of lightning over-voltage using Method of Moments

In the last twenty years, the widespread use of sensitive electronic devices in telecommunication systems and power systems has increased the interest in transients, in particular those caused by lightning (direct and/or indirect) strokes. Lightning over-voltage, causing unpredictable and accidental interruption in these systems, is a very important factor also in telecommunication systems and transmission lines. So the electromagnetic interference analysis of different communication towers under the influence of lightning over-voltage is necessary to avoid these unexpected interruptions. This paper presents a numerical electromagnetic simulation of direct lightning stroke for the EMI analysis of a full-size GSM tower utilizing method of moments. This analysis is also a primary factor that can give approximate solution, helpful for correct EMC design of transient protection circuits for GSM base-station.