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NEAR EAST UNIVERSITY Faculty of Engineering NEAR EAST UNIVERSITY Faculty of Engineering Department of Electrical & Electronic Engineering Radar In Military Services Graduation Project EE-400 Student: Anwar Sarsour(981403) Supervisor: Assoc. Prof. Dr: Sameer lkhdair t.efkosa - 2001 TABLE OF CONTENST A.CK.i'IOWLIGMENT LIST OF ABBREV ATIONS ii ABSTRACT iv INTRODUCTION V I. BASIC PRINCIPLES 1.1 Basic Radar System 2 1.1.1 Development of Radar 5 1.1.2 Frequencies and Power Used in Radar 7 1.2 Radar Performance Factor 8 1.2.1 Factors ,Influencing Maximum Range 10 1.2.2 Effect of Noise 1 l 1.2.3 Target Properties 14 2. PULSED SYSTEM 15 2.1 Basic Pulsed Radar 15 2.1.1 Receiver Bandwidth Requirements 18 2.1.2 Factors Governing Pulse Characteristics. 19 2.2 Antennas and Scanning 21 2.2.1 Antenna Scanning 22 2.2 .. 2. Antenna Tracking 23 2.3 Display Methods 26 2.4 Pulsed Radar System 29 2.4.1 Search Radar Systems 29 2.4.1 Tracking Radar Systems 30 2.5 Moving Target Indicator (MTI) 31 2.5.1 Fundamentals of MTI 33 2.5.2- Other Analog MTI System 36 2.5.3 Delay Lines 36 2.5.4 Blind Speeds 37 2.5.5 Digital MTI 38 2.6 Radar Beacons 38 3. OTHER RADAR SYSTEMS 41 3.1 CW Doppler Radar 41 3.2 Frequency-Modulated CW Radar 44 3.3 Phased Array Radars 46 3.4 Planar Array Radar 50 4. MILITARY DEFENSE AND ATTACK 53 4.1 Air Defense 53 4.1.1 Radar in World War II 55 4.1.2 Radar during the Cold War 55 4.2 Radar Systems Classification Methods 56 4.2.1 World War II Radars 56 4.2.1.1 AN/TPS-lB, 1 C, 1 D 57 4.2.1.2 AN/CPS-4 57 4.2.1.3 AN/CPS-5 57 4.2. l .4 AN/CPS-6. 6A. 68 58 4.2.1.S AN/TPS-10. 1 OA I AN/FPS-4 58 -J..2.2 Early Cold War Search Radars 59 4.2.2. l AN/FPS-3, 3A 59 4.2.2.2 AN/FPS-5 59 4.2.2.3 AN/FPS-8 59 4.2.2.4 AN/FPS-10 59 4.2.3 SAGE System Compatible Search Radars 60 4.2.3. l AN/FPS- 7. 7 A. 78. 7CI 70 60 4.2.3.2 AN/FPS-20,20A, 208 60 4.2.3.3 AN/FPS-24 61 4-.2.3.4 AN/IFPS-27.27 A 61 4.2 .. 3.5 AN/FPS-28 61 4.2.3.6 AN/FPS-30 61 4.2.3.7 AN/FPS-31 61 4.2.3.8 AN/FPS-35 62 4.2.3.9 AN/FPS-64, 65, 66, 67, 67 A. 72 62 4.2.3.10 AN/FPS-87 A 62 4.2.3.11 AN/IFPS-88 62 4-.2.3 .12 AN/IFPS-91 62 4.2.3.13 AN/IFPS-93 63 4-.2.3 .14- AN/IFPS-100 63 4.2.3 .15 AN/IFPS-100 63 4.2 .. 3 .16 AN/IFPS-6,6A, 68 63 4.2.3.17 AN/FPS-26 63 4.2.3.18 AN/FPS-89 63 4.2.3.19 AN/FPS-90 64 4-.2.3 .20 A.N/FPS-116 64 4.2.3.21 Gap-Filler Radars 64 4.2.3.22 AN/FPS-14- 64 4.2.3.23 AN/FPS-18 64 4.2.3.24 AN/FPS-19 65 4.2.4 North Warning System Radars 65 4.2.4.1 AN/FPS-117 65 4.2.4.2 AN/FPS-124 65 4.2.4.3 AN/FSS-7 65 4.2.4.4 AN/FPS-1 7 66 4.2.4.5 AN/FPS-49, 49A 66 4.2.4.6 AN!FPS-50 66 4.2.4. 7 AN/FPS-85 67 4.2.4.8 ANIFPS-92 67 4.2.4.9 AN/FPS-108 (Cobra Dane) 67 4.2.4.10 AN/FPS-115 67 4.2.4.11 AN/FPS-118 (OTH-B) 68 4.2.4.12 PARCS 68 4.3 Missile Detection and Defense 68 4.4 Ballistic Missile Early Warning System (BMEWS) Radars 75 4.4.1 AN/FSS- 7 75 4.4.2AN/FPS-l 7 75 4.4.3 AN/FPS-49, 49A 75 -.-..-t .-'\N/FPS-50 76 -A.5 .-\N/FPS-85 76 -.-1.6 AN/FPS-92 76 -.J.. 7 AN/FPS-108 (Cobra Dane) 77 -.~.8 AN/FPS-1 15 77 ~.4.9 ANIFPS-118 (OTH-8) 77 .4.10 PARCS 77 ~.5 Federal Aviation Administration (FAA) Radars 78 4.5 .1 ARSR-1 78 4.5.2 ARSR-2 78 -L5.3 ARSR-3, 30 78 4.5.4 ARSR-4 78 4.6 Command And Control Systems 79 4.6.1 Backup Interceptor Control (BUIC) System 79 CONCLUSION 80 REFERENCES 82 ACKNOWLEGMENTS First of all I would like to thank my supervisor Assoc. Prof. Dr. Smeer lkhdair who has helped me to finish and realize this difficult task, In each discussion, he explained my questions patiently, and I fell my quick progress from his advises. I asked him many questions about radar and he always answered my questions quickly and in detail. To my own Prof Dr. Fakhredden Mamedov who is the Dean of Engineering Faculty to all his participate. Also thanks to Dr. Kadri, Mr. Ozgur, Mr. Maherdad and all of my other teachers for their advises. To my friends in N.E.U: Yousif Al-Jazzar, Belal Al-yazji, Moheeb Abu- Alqumbouz, and special thanks to Taysser Shehada who helped me very much in completing this project. To my brother and sisters, my sincere thanks are beyond words for their continuous encouragement. Finally, I am deeply indebted to my parents. Without their endless support and love for me, I would never achieve my current position. I wish my mother lives happily always, and my father in the heaven be proud of me. To all of them, all my love. 1 INTRODUCTION We had thought to do our work on the radar system, and then we search for the important part on this subject since the military radar system is one of the most common and important parts in the communication system. In 1888 Heinrich Hertz showed that the invisible electromagnetic waves radiated by suitable electrical circuits travel with the speed of light, and that they are reflected in a similar way. From time to time in the succeeding decades it was suggested that these properties might be used to detect obstacles to navigation, but the first successful experiments that made use of them were in an entirely different context, namely, to determine the height of the reflecting layers in the upper atmosphere. One of these experiments, that of Tuve and Breit, made use of short repeated pulses of radiation, and this technique was employed in most of the developments of radar. Electromagnetic radiation travels in empty space at a speed of 2.998 x 108 metes per second, and in air only slightly less rapidly; we can think of its speed as very nearly 300,000 kilometers per second. This speed is denoted by the letter c. Let us suppose that a very short pulse of radiation is directed towards an object at a distance r, and that a small fraction of this is reflected back to the starting point, so that it has traversed the distance 2r. This will take a time t = 2r/c. Ifwe can measure this time we can determine an unknown distance to the target: r = 1/2ct. For useful terrestrial distances t is very small; an object 15 km away, for example, will return a signal in one ten-thousandth of a second. In practice we need to know more about the target than its distance; we must also determine its direction. Arranging an antenna system to project a suitable radiation pattern that can be rotated in azimuth or elevation does this. As may be deduced from what follows, a very great deal of ingenuity and engineering skill has been devoted to the design of radar antennas. The first successful radar installations in Great Britain in the years 1935 to 1939 used wavelengths in the 6 to 15 m band, and required very large antennas. Other equipment developed later used wavelengths of 3 m and 1.5 m; and in 1940 the invention of a new form of generator, the cavity magnetron, at once made it practicable to employ 1 wavelengths of 10 cm and even less. Nearly all the radar development at the National Research Council in 1942 and later was done at centimeters wavelengths, universally referred to as microwaves. In chapter one we are going to talk about the basic principles of the radar, the main components of it, the development. In this chapter we are going to talk also about the maximum unambiguous range. Frequencies and power used in radar, performance factor, factors influencing maximum range, effect of noise, and, target properties. In chapter two present the Basic pulsed radar, receiver bandwidth requirements, factors governing pulse characteristics, Antennas and scanning, antenna scanning, Antenna tracking, Display methods, Pulsed radar system, Moving target indicator (MTI), and, Radar beacons. Chapter three explains, shows other radar systems like CW Doppler radar, frequency-modulated CW radar, phased array radars, and, planar-array radar. Chapter four is a bout the radar in military uses, from 1888 until now how there use it , how it was developed, and some examples of it.
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