EMI/EMC considerations in ultra wideband (UWB) electronic systems

Abstract

EMI / EMC considerations are very important and can't be ignored in modern electronic, electrical and electromechanical systems. The performance of these current day systems is highly influenced by other electronic / electrical / electromechanical systems working around it and vice versa. These systems are either influence or getting influenced by other systems, working in tandem. Many examples are visible around us which are influenced by this unwanted phenomenon, which include cross talk in cell phones or hissy noises in mobile radios, shaking of computers screens during cell phone signal reception etc., which are normally operates over narrow band frequency ranges. Thus many engineers are working very hard to reduce EMI in their systems, while protecting the interests of neighboring systems. Considering these facts, the electrical engineers can estimate the level of EMI in ultra wide band (UWB) systems, which are coming into existence over past many years. As UWB system accepts many MHz / GHz band of signals, EMI is more predominant in these systems and affects the performance of the self and neighboring systems. In practice, Electronic Warfare (EW) systems are collocated with many other electronic, electrical and electromechanical systems like navigational radars, early warning radars, fire control radars, wire & wireless communication systems, sonars, Missile control systems, Gyro systems, CW illuminators, Gun Control Systems, High speed computers, monitors, etc.,. The interoperability of these systems / subsystems is very critical for military applications. Hence an attempt is made to present various EMI / EMC issues and few practical suggestions implemented to overcome these issues in EW systems are presented in this paper.