1. 22/8/14 Subject Name: Microwave and Radar – Unit 7 Subject Code: 10EC54 Prepared By: Lakshmi C R, Dharani K G Department: ECE Date: 10.11.14

2. UNIT 7 AN INTRODUCTION TO RADAR

3. 22/8/14 Topic Details Indroduction to RADAR Basic RADAR Simple form of RADAR Equation RADAR Block Diagram RADAR Frequencies Applications of RADAR Origin of RADAR

4. 22/8/14 Basic RADAR RADAR is an electromagnetic System for detection and location of reflecting objects such as aircrafts,ships RADAR stand for Radio Detection and Ranging

5. 22/8/14 Simple Form Of RADAR Equation Radar Range Equation R max = [P t G б A e /( 4П) 2 Smin] 1/4 G = 4ПAe / λ 2 A e = Gλ 2 / 4П R max = [Pt Gλ 2 б / (4П) 2 S min] 1/4 Where Pr = power received Pt = power transmitted G = antenna gain б = radar cross section of target A e = effective area

6. 22/8/14 Radar Block Diagram PULSE MODULATOR DUPLEXER POWER AMPLIFIER WAVEFORM GENERATOR LOW NOISE AMPLIFIER MIXER IF AMPLI FIER LO MATCH ED FILTER VIDEO AMPLIF IER THRESH HOLD DECISIO N

7. 22/8/14 Radar Frequencies BAND DESIGNATIONNOMINAL FREQUENCY RANGE HF3-30 MHZ VHF30-300 MHZ UHF300-1000MHZ L BAND1-2 GHZ S BAND2-4 GHZ C BAND4-8 GHZ X BAND8-12 GHZ

8. 22/8/14 BAND DESIGNATIONNOMINAL FREQUENCY BANG KU12-18 GHZ K18-27 GHZ KA BAND27 -40GHZ V40-75GHZ W75-110 GHZ

9. 22/8/14 APPLICATIONS Employed to detect targets in air,sea,space Military Applications Remote Sensing Air Traffic Control Law Enforcement in Highways Aircraft and Navigation] Ship Safety Space Household Applications

10. 22/8/14

11. Origin Of Radar Germen Scientist first demonstrated basic concepts of RADAR during 1885 to 1888 Christian Hulsmeyer assembled monostatic pulse radar Marconi dicussed applications of RADAR During world war1 applied for bomber aereoplanes After world war 2 gain more importance Development of MTI and SAR RADAR took place Digital processing was introduced into the field