ABSTRACT
Electronic sensors are being used in a variety of applications in our modern life, from security and defense to public health, education to transportation, science to sports. The sensors may be electromagnetic, acoustic, thermal, chemical, biological, etc. A radar (an acronym for radio detection and ranging) is commonly used for an electromagnetic sensor. In this chapter, fundamentals of radar are presented. Starting from the historical background, the theory, the signal environment, the radar equation, and applications are outlined.
