© FEB 2019 | IRE Journals | Volume 2 Issue 8 | ISSN: 2456-8880 IRE 1700935 ICONIC RESEARCH AND ENGINEERING JOURNALS 69 An Overview of an Esoteric Pollution EMI- EMC N.D. MEHTA 1 DR. A. M. HAQUE 2 , ASHISH P. PATEL 3 1,2,3 Assistant Professor, Vishwakarma Government Engineering College, Chandkheda, Ahmadabad India Abstract -- Water, air and Sound pollution is well within the human perception, but esoteric pollution of frequency spectrum called Electromagnetic Interference (EMI) must address in today’s world of computerization where authors emphasize on high band width / high speed along with miniaturization of products. Electromagnetic Interference (EMI) is either a continuous or intermittent electromagnetic disturbance or electrical signal that, if not properly addressed, can be transmitted into, or out of, electronic equipment and can disturb the normal and intended operation of electronic systems. EMI is discernible across the entire electromagnetic spectrum and can be generated across either a narrow band or a broad spectrum of frequencies, with the more typical areas of interest extending from the low kHz range to the upper GHz range. Adverse effect if EMI have increased manifold so all the electrical and electronic products should be Electromagnetically Compatible (EMC). This paper reviews the aspect of EMI/EMC, Standards, testing and control requirement of EMC along with coupling mechanism and adverse effect of EMI/ EMC. Indexed Terms: Electromagnetic Interference, EMI, EMC, Aspects of EMI I. INTRODUCTION We all are aware of several pollutions like water pollution, air pollution, sound pollution, etc. These pollutions are well within human perception. But there exists one more type of pollution called pollution of frequency spectrum. It is called Electromagnetic Interferences (EMI). Electromagnetic Interference (EMI) also called Radio Frequency Interference (RFI) is a disturbance that effects an electrical circuit due to either electromagnetic conduction or electromagnetic radiation emitted from an external source. EMI is more esoteric, i.e., it cannot be directly seen, tested, smelled or felt. In today’s scenario of computerization, where the thrust is on high bandwidth / high speed along with miniaturization of products, adverse effects of EMI have increased manifold. All Electronic devices gives off electromagnetic emission. This is radiation that is a by product of electrical or magnetic activity. Unfortunately, the emission from one device can interfere with the other devices, causing potential, problems. Interference can lead to data loss, picture quality degradation on monitors, and other problems with your PC, or problems with other devices such as television sets and radios. Whenever a circuit is operated, some signal is generated that may be desired for one circuit but undesired for another. EMI is the presence of undesired signals (voltage or current) that adversely influence the performance of a device. Occurrence of EMI is a common phenomenon in day- to-day operation of electronic equipment, like jamming of radio sets under high-tension wires, white spots on TV screens or hissing sound in TV or radio when a bike or airplane passes nearby, or a motor or mixer grinder is operated. These types of effects are quite common. One can have a casual approach towards them. But think of situation when a pacemaker fitted in a heart patient gets affected by EMI. Here it is a question of life and death. Other consequences of EMI can be loss of data transmission, unintended detonation of explosive devices, malfunctioning of missile guidance systems, malfunctioning of critical process control systems in industries, etc. In this situation, the consequences of EMI can be disastrous. So, all the electrical and electronic products should be Electromagnetically Compatible (EMC). Electromagnetic Compatibility is a branch of electrical sciences which studies the unintentional generation, propagation and reception o Electromagnetic energy with reference to its unwanted effects that such energy may induce. The goal of EMC is the correct operation, in the same electromagnetic environment, of different equipment which use electromagnetic phenomenon, and the avoidance of any interference effects.