K. Deep et al. (Eds.): Proceedings of the International Conference on SocProS 2011, AISC 131, pp. 331–342. springerlink.com © Springer India 2012 Electromagnetic Interference Shielding Design Using Real-Coded Genetic Algorithm and Reliability Evaluation in X-Band H. Gargama 1 , S.K. Chaturvedi 1 , and Awalendra K. Thakur 2 1 Reliability Engineering Centre, IIT Kharagpur, Kharagpur-721302, (W.B.), India 2 Physics & Meteorology, IIT Kharagpur, Kharagpur-721302, (W.B.), India heeralalgargama@gmail.com Abstract. The increased deployment of various electrical and electronic equip- ments/devices for the commercial, industrial, and military systems has created a number of sources and receptors of electromagnetic interference that can degrade the system performance or affect safety operation of intelligence/secrecy between the various services. To avoid the interference problems from the adverse effects of electromagnetic waves, there is a greater need for shielding of these equip- ments/devices. In this paper, a design approach to meet the military requirement shielding for multi-layer electromagnetic shield is described. This design problem is solved by using shielding effectiveness theory based on transmission line mod- eling and real-coded genetic algorithm with simulated binary crossover and para- meter-based mutation. Further, it is shown that by using Monte Carlo simulation, the performance of electromagnetic shielding under the uncertain operating condi- tions can be evaluated in terms of reliability. Keywords: Electromagnetic shielding, real-coded GA, EMI shielding reliability, multilayer shielding structure, EMI shielding performance. 1 Introduction Interference of extraneous electromagnetic (EM) signal can have a lot of undesir- able consequence ranging from device tracking to device performance of medical devices, military equipment, radio astronomy, weapon controllers, missile guid- ance, tracking systems for satellite and space vehicles, computers, aircraft, mobile phones, television sets, and vents. The current emphasis on miniaturization of de- vices/device assemblies (such as transmitters, receivers, sensors, and other com- ponent in one compact enclosure) causes serious concern related to interference of signals. The electromagnetic interference (EMI) caused by these signals necessi- tate protective materials to avoid diminished product performance or product fail- ures or to meet the requirements of emission limits set by governmental agencies worldwide [1]-[3].