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CHAPTER 1 — BASIC RADAR PRINCIPLES AND GENERAL …

1 CHAPTER 1 BASIC RADAR PRINCIPLES AND GENERAL CHARACTERISTICSINTRODUCTIONThe word RADAR is an acronym derived from the phraseRAdioDetectionAndRanging and applies to electronic equipment designed for detecting andtracking objects (targets) at considerable distances. The BASIC principlebehind RADAR is simple - extremely short bursts of radio energy (traveling atthe speed of light) are transmitted, reflected off a target and then returned asan makes use of a phenomenon we have all observed, that of theECHO PRINCIPLE.

The terms PULSE-MODULATED RADAR and PULSE MODULATION are derived from this method of transmission of radio-frequency energy. If the distance to a target is to be determined by measuring the time required for one pulse to travel to the target and return as a reflected echo, it is necessary that this cycle be completed before the pulse immediately

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