Radar System Engineering

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206 THE GATHERING AND PRESENTATION OF RADAR DATA [SEC.614 arose in the past war in connection with the defense of bombing aircraft against nightfighters. The limitations of AI radar were such that a coordinated attack on a single bomber by more than one nightfighter was not possible, and the only practicable attack was the stern chase. Under I these circumstances, the bomber can be protected by a simple, shortrange radar equipment mounted in the tail turret. The B-29 was equipped with a radar of this sort, the AN/APG-15. Figure 6.35 shows the antenna installation. The equipment operated at 12 cm, and had a 12-in. dish giving a beamwidth of about 25°. This beamwidth was sufficient to give warn-
SEC. 614] PRECISION TRACKING OF A SINGLE TARGET 207 ing coverage of the tail cone without the necessity for scanning. The beam \vasconically scanned by rotating the reflector about an axis which made an angle of 2.5° ~rith its o~rn. Commutators were mounted on the shaft of the antenna rotation mechanism so that signals from the upper half of the scan collld be integrated and compared with those from the lower half; similarly, signals from the left half of the scan were compared with those from the right. The resulting error voltages were used to deflect the spot of a CRT used as an error indicator. An automatic circuit searched in range in the absence of a target, and locked on and tracked a target when an echo was encountered within the 2000-yd coverage of the set. This range circuit was used to brighten the spot only when a target was in range, in order to distinguish between correct pointing and the absence of a target. It also caused the target spot to grow horizontal “wings” whose spread increased as the range grew shorter, in order to provide an indication of range to the gunner (see Fig. 6.13). The axis of the conical scan was aligned with the guns so that only point-blank fire with no lead was possible. Thk was done because the lead required in countering the usual nightfighter approach is negligible. “ The indicator was so arranged that its display was projected into the reflector sight, enabling the gunner to use the same technique for either optical or radar tracking. This equipment became available so late in the war that it had substantially no operational use, but its provingground tests indicated that its performance would have been quite satisfact ory. The attainable angular accuracy was about + 0.5°. The AN/APG-15 was unusual in that a triode, the “lighthouse” tube, was used as a pulsed oscillator. At the low pulse power used (about 500 watts), this enabled transmitter, receiver, and the necessary rectifierfilter power supplies to be housed in one compact unit, shown in Fig. 6.36. Automatic Angle Tracking. -Shortcomings of the SCR-268 as a firecontrol position finder arose mainly from the use of a relatively long wavelength which resulted in broad beams from antennas of any reasonable size. When microwave radar became practicable with the development of the cavity magnetron, one of the immediate applications of the new technique was an antiaircraft position finder. The most widely used and generally successfld of the resulting equipments was the SCR-584. Before beginning precision tracking of a single target, a radar that is to serve as the only equipment of an antiaircraft battery must execute a general search in order to locate targets that are to be tracked and engaged. No auxiliarv long-wave radar search equipment was provided \vith the SC R-584. Instead, the 6-ft antenna reflector was helically scanned, and targets presented on a PPI whose maximum range was 60,000 yd. A range of elevation angles up to 10° was covered by the
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CHAPTER 1 INTRODUCTION BY LOUIS N.
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4 IN TRODUC7”ION [SEC.1.2 flik~c
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6 INTRODUCTION [SEC.1.3 pulse leaki
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8 INTRODUCTION [SEC.1.4 antenna is
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10 INTRODUCTION [SEC.14 step in out
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12 INTRODUCTION [SEC.1.5 where high
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14 INTRODUCTION [SEC.1.6 England, F
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16 INTRODUCTION [SEC.1°7 Microwave
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CHAPTER 2 THE lU.DAR EQUATION BY E.
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20 THE RADAR EQUATION [SEC.22 radia
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22 THE RADAR EQUATION [SEC.25 Again
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24 THE RADAR EQUATION [SEC.2.5 time
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26 THE RADAR EQUATION [SEC.2.5 smal
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28 THE RADAR EQUATION [SEC.!2.7 lim
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30 THE RADAR EQUATION [SEC.28 Anoth
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32 THE RADAR EQUATION [SEC.28 first
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34 TIIE RADAR EQUATION [Sm. 29 the
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36 THE RADAR EQUATION [SEC.2.10 (Vo
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38 THE RADAR EQUATION [SEC.210 prac
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40 THE RADAR EQUATION [SEC.2.10 tai
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42 THE RADAR EQUATION [SEC.2.11 swe
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44 THE RADAR EQUATION [SEC.2.11 res
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46 THE RADAR EQUATION [SEC.211 Alth
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48 THE RADAR EQUATION [SEC.212 othe
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50 THE RADAR EQUATION [SEC.212 The
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52 THE RADAR EQUATION [SEC. 2.12 Th
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54 THE RADAR EQUATION [SEC.213 smal
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56 THE RADAR EQUATION [SEC. 2.14 an
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58 THE RADAR EQUATION [SEC.2.15 not
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60 TIIE RADAR EQUATION [SEC.2.15 wt
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62 THE RADAR EQUATION [SEC.215 per
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64 PROPERTIES OF RADAR TARGETS [SEC
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66 PROPERTIES OF RADAR TARGET,S [SE
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PROPERTIES OF RADAR TARGETS [SEC.37
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88 PROPERTIES OF R.41~.l R T.-lRGE~
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92 PROPERTIES OF RA1l.4R TARGETS [S
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SEC.315] STRUCTURES 99 example, the
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SF,C. 3.16] CITIES 101 reflection w
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SEC. 3.16] CITIES 103 signal repres
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SEC. 3.16] CITIES 105 four signals
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108 PROPERTIES OF RADAR TARGETS [SE
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112 PROPERTIES OF RADAR TARGETS [SE
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CHAPTER 4 LIMITATIONS OF PULSE RADA
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118 LIMITATIONS OF PULSE RADAR [SEC
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122 LIMITATIONS OF PC’LSE RADAR [
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128 C-W RADAR SYSTEMS [SEC. 5.1 tar
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130 C-W RADAR SYSTEMS [sm. 53 point
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132 C-W RADAR S’YSTEMS [SEC.56 bi
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134 C-W RADAR SYSTEMS [SEC. 56 tran
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136 C-W RADAR SYSTEMS [SEC. 5.6 int
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138 C-W RADAR SYSTEMS [SEC, 5.6 rel
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140 C-W RADAR SYSTEMS [SEC 37 and j
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142 C-II’ RADAR SYSTEMS [SEC. 57
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144 C-W RADAR SYSTE.JfS [SEC. 58 gi
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146 C-W RADAR SYSTEMS [SEC. 58 Modu
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148 C-T RA DAR S YSTE.lf S [SEC. 59
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150 C-W RADAR SYSTEMS [SEC. 5.11 cy
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152 C-W RADAR SYSTEMS [SEC.5.11 Now
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154 C-W RADAR SYSTEMS [SEC.5.11 exc
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Page 158 and 159: 158 C-W RADAR SYSTEMS [SEC. 5.12 Pu
Page 160 and 161: CHAPTER 6 THE GATHERING AND PRESENT
Page 162 and 163: 162 THE GATHERING AND PRESENTATION
Page 168 and 169: 168 THE GATHERING AND pRESENTA TION
Page 170 and 171: ~70 THE GATHERING AND PRESENTA TION
Page 173 and 174: SEC. 66] PLANE DISPLAYS INVOLVING E
Page 175 and 176: SEC. 69] IiARLY AIRCRAFT-WARNING RA
Page 177 and 178: SEC. 69] EARLY AIRCRAFT-WARNING RAD
Page 179 and 180: f$Ec. 69] EARLY AIRCRAFT-WARNING RA
Page 181 and 182: SEC. 6.9] EARLY AIRCRAFT-WARNING RA
Page 183 and 184: SEC. 6.10] PPI RADAR FOR SEARCH, CO
Page 185 and 186: SEC. 6.11] HEIGHT-FINDING INVOLVING
Page 187 and 188: SEC.6.12] HEIGHT-FINDING WITH A FRE
Page 193 and 194: - - -— . .. —-— - .. —-.
Page 195 and 196: SEC. 612] HEIGHT-FINDING J~ITH A FR
Page 197 and 198: SEC. 6.13] HOMING 197 ber of the pa
Page 199 and 200: SEC.6.13] HOMING 199 usually made t
Page 201 and 202: SEC. 6.13] HOMING 201 application,
Page 203 and 204: SEC. 6.14] PRECISION TRACKING OF A
Page 205: SEC.6.14] PRECISION TRACKING OF A S
Page 209 and 210: f$Ec. 614] PRECISION TRACKING OF A
Page 211 and 212: SEC. 615] PRECISION TRACKING DURING
Page 213 and 214: CHAPTER 7 THE EMPLOYMENT OF RADAR D
Page 215 and 216: SEC.72] AIDS TO INDIVIDUAL NAVIGATI
Page 217 and 218: SEC. 7.2] AIDS TO INDIVIDUAL NAVIGA
Page 219 and 220: SEC. 73] AIDS TO PLOTTING AND CONTR
Page 221 and 222: SEC.7.3] AIDS TO PLOTTING AND CONTR
Page 223 and 224: SEC.7.3] AIDS TO PLOTTING AND CONTR
Page 225 and 226: SEC. 7.4] THE RELAY OF RADAR DISPLA
Page 227 and 228: SEC. 7.51 RA DAR IN THE RAF FIGHTER
Page 229 and 230: SEC. 7.6] THE U.S. TACTICAL AIR COM
Page 235: SEC.7.6] THE U.S. TACTICAL AIR COMM
Page 238 and 239: 238 THE EMPLOYMENT OF RA DAR DATA [
Page 240 and 241: 240 THE EMPLOYiWENT OF RADAR DATA [
Page 242 and 243: 242 THE EMPLOYMENT OF RADAR DATA [S
Page 244 and 245: 244 RADAR BEACONS [SEC. 8 duration
Page 246 and 247: 246 RADAR BEACONS [SEC. 8.1 beacons
Page 248 and 249: 248 RADAR BEACONS [SEC.8.1 4. Porta
Page 250 and 251: 250 RADAR BEACONS [SEC.8.2 Table 8.
Page 252 and 253: 252 RADAR BEACONS [SEC.84 restricte
Page 254 and 255: 254 RADAR BEACONS [SEC. 85 radar se
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256 RADAR BEACONS [SEC.85 In the ca
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258 It Al)AIt BEACONS [S,,c, S3 Sim
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SEC. 86] FREQUENCY CONSIDERATIONS 2
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SEC. 87] INTERR~A TION CODES 263 wi
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SEC. 8.9] TRAFFIC CAPACITY 265 diff
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SEC.8.9] TRAFFIC CAPACITY 267 which
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270 RADAR BEACONS [SEC. 810 range a
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272 ANTENNAS, SCANNERS, A.VD STABIL
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274 ANTENNAS, SCANNERS, AND ST ABIL
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276 ANTENNAS, SCANNERS, AND STABILI
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SEC. 913] THE AN/APQ-7 (EAGLE) SCAN
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SEC.913] THE AN/APQ-7 (EAGLE) SCANN
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SEC. 9.14] SCHWA RZSCHILD ANTENNA 2
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SEC. 9.14] SCH WA RZSCHILD ANTENNA
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SEC. 9.15] SCI HEIGHT FINDER 299 de
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SEC.9.15] SCI HEIGHT FINDER 301 In
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SEC.916] OTHER TYPES OF ELECTRICAL
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SEC,9.17] STABILIZATION OF THE BEAM
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SEC. 9.17] STABILIZATION OF’ THE
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SEC. 9.17] STABILIZATION OF THE BEA
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t$Ec. 9,18] DATA STABILIZATION 311
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SEC. 920] INSTALLATION OF SURFACE-B
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SEC. 922] STREA MLIA”ING 315 func
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SEC. 9.25] EXAMPLES OF RADOMES 317
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SEC.9.25] EXAMPLES OF RADOMES 319 a
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SEC. 10.1] CONSTRUCTION 321 of the
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SEC. 10.1] CONSTRUCTION 323 later r
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SEC.10.2] THE RESONANT SYSTEM 325 m
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SEC. 1021 THE RESONANT SYSTEM 327
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SEC. 10.2] THE RESONANT SYSTEM 329
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SEC. 103] ELECTRON ORBITS AIVD THE
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SEC. 103] ELECTRON ORBITS AND THE S
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SEC. 103] ELECTRON ORBITS AND THE S
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SEC. 10.4] PERFORMANCE CHARTS AND R
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SEC. 10.4] PEIWORMilNCE CHARTS AND
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SEC. 10.5] MAGNETRON CHARACTERISTIC
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SEC.105] MAGNETRON CHARACTERISTICS
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SEC. 105] MAGNETRON CHARACTERISTICS
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SEC. 10.5] MAGNETRON CHARACTERISTIC
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SEC. 10.6] MAQNETRON CHARACTERISTIC
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L%C. 10.6] MAGNETRON CHARACTERISTIC
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SEC. 10.7] PULSER CIRCUITS 357 and
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SEC. 10.7] PULSER CIRCUITS 359 tude
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SEC. 10.7] PULSER CIRCUITS 361 cen~
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SEC. 108] LOAD REQUIREMENTS 363 TAB
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SEC. 10.8] LOAD REQUIREMENTS 365 to
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SEC. 109] THE HARD-TUBE P ULSEh? 36
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SEC. 10.9] THE HARD-TUBE P ULSER 36
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SEC 10.9] THE HARD-lUBE PULSER 371
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Sl?lc.10.91 LINE-TYPE PULSERS 373 D
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SEC. 10,10] LINE-TYPE PULSERS 375 i
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SEC. 10.10] LINE-TYPE PULSERS 377 I
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SEC. 10.10] LINE-T YPE PULSERS 379
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SEC. 10.10] LINE-TYPE PULSERS 381 T
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SEC.10.11] MISCELLANEOUS COMPONENTS
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SEC. 1011] MISCELLANEOUS COMPONENTS
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R-F CHAPTER 11 COMPONENTS BY A. E.
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SEC.11.2] COAXIAL LINES 393 Why a M
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SEC.11.2] COAXIAL LINES 395 lines h
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SEC.11.2] COAXIAL LINES 397 since n
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SEC,113] JVA VEGUIDE 399 than a qua
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i?EC. 11.3] WA VEGUIDE 401 too grad
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SEC. 113) WA VEGUIDE 403 types of m
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SEC. 11.4] RESONANT CAVITIES 405 co
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SEC. 11.5] D,C”PLEXING AND TR SWI
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SEC. 115] DUPLEXING AND TR SWITCHES
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SEC. 11.5] DUPLEXING AND TR SWITCHE
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SEC.11.6] THE MIXER CRYSTAL 413 sem
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SEC. 11.7] THE LOCAL OSCILLATOR 415
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SEC. 11 .8] THE MIXER 417 minimum l
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SEC.11.10] REASONS FOR AN R-F PACKA
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SEC. 11.11] DESIGN CONSZDERA TZONS
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SEC.11.11] DESIGN CONSIDERATIONS FO
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SEC. 11.12] ILLUSTRATIVE EXAMPLES O
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SEC. 11°12] ILL US’TRA TIVE EXAM
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SEC. 11.12] ILL USTRA TIVE EXAMPLES
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SEC.11.12] ILL US1’IiA TI VE EXA
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CHAPTER 12 THE RECEIVING SYSTEM—R
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SEC. 122] A TYPICAL RECEIVING SYSTE
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SEC.12.2] A TYPICAL RECEIVING SYSTE
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SEC. 122] A TYPICAL RECEIVING SYSTE
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SEC.12.3] SPECIAL PROBLEMS IN RADAR
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SEC.12.4] I-F AMPLIFIER DESIGN 443
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SEC.12.4] I-F AMPLIFIER DESIGN 445
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SEC.124] I-F AMPLIFIER DESIGN 447 i
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SEC. 125] SECOND DETECTOR 449 This
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SEC.12.6] VIDEO AMPLIFIERS 451 ampl
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SEC.12.7] A UTOMA TIC FREQUENCY CON
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SEC. 12.7] A UTOMA TIC FREQUENCY CO
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S~C. 128] PROTECTION AGAINST EXTRAN
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SEC. 128] PROTECTION AGAINST EXTRAN
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SEC. 12.8] PROTECTION AGAINST E-YTR
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&- L,-self resonant COIIS at mterme
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J All resistors~ watt Interstate co
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SEC. 12.10] LIGHTH”EIGIIT AIRBOR.
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s, 0.001 $180 b To reflector To sea
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+ 180v T +120V 470 470 470 470 e“
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SEC.12.11] AN EXTREMELY WIDEBAND RE
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CHAPTER 13 THE RECEIVING SYSTEM—I
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SEC.13.1] ELECTRICAL PROPERTIES OF
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SEC 13.2] CATHODE-RAY TUBE SCREENS
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SEC.13.2] CATHODE-RAY TUBE SCREENS
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SEC. 13.3] SELECTIO.V OF THE CATHOD
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SEC. 13.3] SELECTION OF THE CATHODE
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SEC. 13.4] ANGLE-DATA TRANSMITTERS
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SEC.13.4] ANGLE-DATA TRANSMITTERS 4
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SEC. 13.5] ELECTROMECHANICAL REPEAT
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SEC. 13.6] AMPLIFIERS 493 whence th
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SEC. 13.6] AMPLIFIERS 495 by using
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SEC. 13.7] GENERA TION OF RECTANGUL
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SEC. 13.7] GENERATION OF RECTANGULA
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. SEC. 13.8] GENERA TION OF SHARP P
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SEC. 139] ELECTRONIC SWITCHES 503 T
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SEC. 13.9] ELECTRONIC SWITCHES 505
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SEC. 13.9] ELECTRO.VIC ISWI TCHES 5
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SEC. 13.9] ELECTRONIC SWITCHES 509
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SEC. 1310] SAWTOOTH GENERATORS 511
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SEC.13.10] SAWTOOTH GE,VBliATOh?S 5
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SEC. 1311] ANGLE INDICES 515 bright
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SEC. 13.11] ANGLE INDICES 517 the s
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. . “4 100k.lw $4.7k-lw .& t, T 0
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SEC.K3.121 RANGE AND HEIGIiT INDICE
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i%C.13121 RANGE AND HEIGHT INDICES;
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SEC. 13.13] DESIGN OF A-SCOPES 525
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SEC. 1313] DESIGN OF A-SCOPES 527 f
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SEC.1314] B-SCOPE DESIGN 529 \
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SEC. 13.14] B-SCOPE DESIG.V 531 wil
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Trigger I I I (CT)Sawtooth —. (A)
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SEC.1316] RESOLVED TIME BASE PPI 53
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SEC. 13.16] RESOLVED mi? TIME BASE
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SEC. 13.17] RESOLVED-CURRENT PPI 53
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SEC. 13.17] RESOLVED-CURRENT PPI 54
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+ 200V— — — J 60k . Llk )k 60
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SEC. 13.19] 1’HE RANGB-ll EIGII1
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SEL!. 13.19] THE RANGE-HEIGHT INDIC
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SEC. 13.20] RESOLUTION AND CONTRAST
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SEC. 13.211 SPECIAL RECEIVING TECHN
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554 THE RECEIVING SYSTEM-INDICATORS
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556 PRIME POWER SUPPLIES FOR RADAR
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. . . 0.9 P~- 860-’CPS CF over 2
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562 PRIME POWER SLTPPLIES FOR RADAR
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SEC. 14.6] SPEED REGULATORS 575 ‘
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SEC. 146] SPEED REGULATORS 577 havi
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SEC. 14.7] DYNAMOTORS 579 14.7. Dyn
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SEC.14.8] VIBRATOR POWER SUPPLIES 5
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SEC. 1410] FIXED LOCATIONS 583 port
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SEC. 14.13] ULTRAPORTABLE UNITS 585
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SEC. l’k~~] SHIP RADAR SYSTEMS 58
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SEC. 151] INTRODCCTIO,\- 589 the pr
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SEC, 152] NEED FOR SYSTEM TESTING 5
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SEC, 153] INITIAL PLANNING AND OBJE
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SEC. 15.4] THE RANGE EQUATION 595 n
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SEC. 15.5] CHOICE OF PULSE LENGTH 5
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SEC. 15.7] AZIMUTH SCAN RATE 599 to
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SEC. 15.8] CHOICE OF BEAM SHAPE 601
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SEC. 15.8] CHOICE OF BEAM SHAPE 603
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SEC. 15.9] CHOICE OF WAVELENGTH 605
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SEC. 15.10] COMPONENTS DESIGN 607 1
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SEC.16.11] MODIFICA TIO.VS A,YD ADD
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SEC. 15.12] DESIGN OBJECTIVES AND L
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SEC. 15.12] DESIGN OBJECTIVES AND L
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SEC. 15.13] GENERAL DESIGN OF THE A
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SEC. 15.14] DETAILED DESIGN OF THE
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SEC. 15.14] DETAILED DESIGN OF THE
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,/ / /“)4 Providenc~ (b) Fm. 16.1
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624 EXAMPLES OF RADAR SYSTEM DESIGN
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CHAPTER 16 MOVING-TARGET INDICATION
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628 MOVING-TARGET INDICATION [SEC,
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630 MOVING-TARGET INDICATION [SEC.
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632 MOVING TARGET INDICATION [SEC.
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. 646 MOVING- TARGET INDICATION [SE
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648 MOVING- TARGET lNDICA TION [SEC
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652 MOVING-TARGET INDICATION [SEC 1
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656 MOVING-TARGET INDICATION [SEC.1
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658 When o = Othe instead MOVING-TA
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662 MOVING TARGET INDICATION [SEC.1
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670 MO VINGTARGET INDICATION [SEC.
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672 MOVING TARGET INDICATION [SEC.1
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674 MOVING- TARGET INDICATION [SEC.
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676 MOVING-TARGET INDICATION ~SEC.
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CHAPTER 17 RADAR RELAY BY L. J. HAW
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682 RADAR RELAY [SEC. 172 transmitt
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684 RADAR RELAY [SEC. 17.3 staggeri
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686 RADAR RELAY [SEC. 17.4 excluded
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688 RADAR RELAY [SEC. 174 long sign
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h Video I 1 I Angle marks RADAR REL
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692 [SEC. 175 ḇ 1 1 1 I ~ LKal tr
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694 RADAR RELAY [SEC. 17.5 generato
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696 RADAR RELAY [SEC. 17.6 station
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698 RADAR RELAY [SEC. 17.6 Video si
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700 RADAR RELAY [SEC. 176 train. Th
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702 RADAR RELAY [SEC.17.7 be obtain
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704 RADAR RELAY @EC. 17.7 illustrat
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[11 1 Bas,c pulse I %e pulse i ~--.
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708 RADAR ltELA Y [SEC. 1743 wave f
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710 RADAR RELAY [SEC. 17.8 actual m
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. 712 RADAR RELAY [SEC. 17.9 Such a
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714 RADAR RELAY [SEC. 17.10 between
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716 RADAR RELAY [SEC. 17.10 signal
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718 RADAR RELAY [SEC. 17.11 suppres
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720 RADAR RELAY [SEC. 17.12 provide
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722 RADAR RELAY [SEC. 17.13 relay l
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724 RADAR RELAY [SEC. 17.14 TaLE 17
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726 RADAR RELAY [SEC. 17.15 RADAR R
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728 RADAR RELAY [SEC. 17.15 Modulat
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730 RADAR RELAY [SEC. 17.15 the sec
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732 RADAR RELAY [SEC. 17.10 pulses
Page 734 and 735:
734 RADAR RELAY [f+iEc.17.16 The vi
Page 737 and 738:
Index A Absorbent materials, 69 Abs
Page 739 and 740:
INDEX 739 B-scope, electrostatic, 5
Page 741 and 742:
INDEX 741 Fairbank, W. M.,80 F Fan
Page 743 and 744:
INDEX ’743 Microwave, reason for
Page 745 and 746:
INDEX 745 Radar, pulse,3 range perf
Page 747 and 748:
INDEX 747 Signal, interference of,
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Radar System Engineering

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