RADAR

IntroductionRadar = Radio Detection And Ranging

Operating Frequency

Use of Radar

Background of Radar1886 : Hertz showed reflection of radio

signal from solid object

1904 : First use of radio waves to detect the distant metallic object

1922 : Taylor & Leo discovered the determination of range & bearing

Basic Principle of Radar

Basic Principle of RadarBlocks of Primary Radar System

- Transmitter- Duplexer- Receiver- Radar Antenna- Indicator

Types of RadarPulse RadarContinuous-wave RadarDoppler RadarFrequency Modulated Radar

Radar Budget LossesAtmospheric LossesBeam shape LossesFluctuation LossesSignal Processing LossesTransmit Line LossesReceive Losses

Advantages of RadarPenetration CapabilityUses electromagnetic waveLess susceptible to weather conditionsFlexible – can be used in number of waysBeam spread can incorporate many targetsReliable

Disadvantages of RadarTime factorWide beam spreadLarger targets can saturate receiverPossibility of falsify readingsInterference sources

ConclusionUsed in Military purposesUsed in AircraftsMarine RadarsUsed in port or harborsUsed in meteorology and geology purposes

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