JELE_V6_N1_RP5 M. Satish Kumar A. Jhansi Rani Journal on Electronics Engineering 2249 – 0760 6 1 41 46 Geo-Magnetic field, Thunderstorm, Spectral Distribution, Ignition Systems The life on Earth has been adapted to survive in an environment of natural low-frequency Electromagnetic (EM) fields in addition to the Earth's Static Geo-Magnetic field. Natural EM fields of low frequency come from two main sources, the sun and thunderstorm activity. However, fields produced by various Electrical and Electronic Systems such as Radio and Television broadcast stations, Communication Transmitters etc., and Automobile Ignition systems, Industrial Control Equipment radiate Electromagnetic Energy at much higher intensities during their normal operation. The electromagnetic environment created by these Intentional and Unintentional sources with a very different Spectral Distribution has altered this natural EM background. The electromagnetic environment created by these Intentional and Unintentional sources, when sufficiently strong, Interferes with the operation of many electrical and electronics equipment and systems which degrades the performance of the system. So the study of Electromagnetic Fields which becomes an interference to the Systems’ operation is needed. For analysis of EM fields, simulation of Co-Axial cable using CST is considered [4]. September – November 2015 Copyright © 2015 i-manager publications. All rights reserved. i-manager Publications http://www.imanagerpublications.com/Article.aspx?ArticleId=3684