Radar System Engineering

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674 MOVING- TARGET INDICATION [SEC. 16.19 more elegant approach is to measure the cancellation residual of a sample pulse and to correct the relative channel gain accordingly. FIQ. 16.35.—Signal circuits and case for the line of Fig. 16.33; two-channel amplifier on the wide chassis at left, video-modulated oscillator and amplifier on the narrow chassis at right. After detection and cancellation of the echoes in the delayed and undelayed channels, the residual video signal must be amplified, rectified, and limited for application to an intensity-modulated indicator such as
SEC. 16.20] DELAY-LINE TRIGGER CIRCUITS 675 a PPI. The most difficult of these operations is amplification. If statistical noise and weak moving-target signals are to be fully visible, they must reach the final video rectifier at a level sufficient to cause linear operation of that detector. Since the noise level at the cancellation detector may be as much as 40 db beneath the signal peak, a gain of several hundred may be required between cancellation and rectification. This video amplification is difficult because of the bipolarity and wide dynamic range of the signals. Unless special precautions are taken, strong signals from moving targets may draw grid current and bias the amplifier to the point where weaker moving-target signals are lost. The bipolar nature of the signals prevents the application of the clamping technique, which is useful in avoiding a similar trouble with unipolar video amplifiers. Blind spots and overshoots can be adequately minimized by careful choice of time constants, grid bias, and plate load resistors, although several additional amplifier tubes may be needed as a result.1 Full-wave rectification before application to a unipolar device such as a PPI is roughly equivalent to doubling the PRF~and is correspondingly to be recommended. Either crystal or diode rectifiers may be used. Limiting can take place both before and after rectification. Figure 16.35 shows the two-channel amplifier on the left, with the delay-line box in the middle, and the video-modulated oscillator and amplifier for driving the delay line on the right. 16.20. Delay-line Trigger Circuits.-For proper cancellation the PRF of the radar transmitter must match the supersonic delay to ~ of a pulse length. Free-running oscillators for generating the trigger have been built to fire the transmitter at a suitably constant rate. Because of the large thermal coefficient of delay in mercury, normal fluctuations in ambient temperature necessitate manual readjust ment of such oscillators at intervals ranging from 10 min to 1 hr. Since this amount of attention cannot be tolerated in most applications, several methods have been devised for automatically maintaining time synchronism between the PRF and the supersonic delay. Time synchronism is maintained by generating trigger pulses at a PRF determined either by the signal delay line or by an auxiliary delay line. The methods for doing this can be divided into two classes regenerative and degenerative. The regenerative method has already been described briefly in Sec. 16.3. The Degenerative Trigger Circuit.—A highly stable oscillator generates the transmitter trigger, and a correction is applied to the oscillator if it fails to match the delay line. This correction is obtained as follows, Several microseconds before the transmitted pulse, the echo input to the 1Nonblocking amplifier design is discussedin Sees. 58 and 10.4of Vol. 18.
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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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156 C-W RADAR SYSTEMS [SEC. 5.11 in
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158 C-W RADAR SYSTEMS [SEC. 5.12 Pu
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CHAPTER 6 THE GATHERING AND PRESENT
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162 THE GATHERING AND PRESENTATION
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168 THE GATHERING AND pRESENTA TION
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~70 THE GATHERING AND PRESENTA TION
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SEC. 66] PLANE DISPLAYS INVOLVING E
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SEC. 69] IiARLY AIRCRAFT-WARNING RA
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SEC. 69] EARLY AIRCRAFT-WARNING RAD
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f$Ec. 69] EARLY AIRCRAFT-WARNING RA
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SEC. 6.9] EARLY AIRCRAFT-WARNING RA
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SEC. 6.10] PPI RADAR FOR SEARCH, CO
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SEC. 6.11] HEIGHT-FINDING INVOLVING
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SEC.6.12] HEIGHT-FINDING WITH A FRE
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- - -— . .. —-— - .. —-.
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SEC. 612] HEIGHT-FINDING J~ITH A FR
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SEC. 6.13] HOMING 197 ber of the pa
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SEC.6.13] HOMING 199 usually made t
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SEC. 6.13] HOMING 201 application,
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SEC. 6.14] PRECISION TRACKING OF A
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SEC.6.14] PRECISION TRACKING OF A S
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SEC. 614] PRECISION TRACKING OF A S
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f$Ec. 614] PRECISION TRACKING OF A
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SEC. 615] PRECISION TRACKING DURING
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CHAPTER 7 THE EMPLOYMENT OF RADAR D
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SEC.72] AIDS TO INDIVIDUAL NAVIGATI
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SEC. 7.2] AIDS TO INDIVIDUAL NAVIGA
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SEC. 73] AIDS TO PLOTTING AND CONTR
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SEC.7.3] AIDS TO PLOTTING AND CONTR
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SEC.7.3] AIDS TO PLOTTING AND CONTR
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SEC. 7.4] THE RELAY OF RADAR DISPLA
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SEC. 7.51 RA DAR IN THE RAF FIGHTER
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SEC. 7.6] THE U.S. TACTICAL AIR COM
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SEC.7.6] THE U.S. TACTICAL AIR COMM
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238 THE EMPLOYMENT OF RA DAR DATA [
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240 THE EMPLOYiWENT OF RADAR DATA [
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242 THE EMPLOYMENT OF RADAR DATA [S
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244 RADAR BEACONS [SEC. 8 duration
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246 RADAR BEACONS [SEC. 8.1 beacons
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248 RADAR BEACONS [SEC.8.1 4. Porta
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250 RADAR BEACONS [SEC.8.2 Table 8.
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252 RADAR BEACONS [SEC.84 restricte
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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
Page 591 and 592:
SEC, 152] NEED FOR SYSTEM TESTING 5
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SEC, 153] INITIAL PLANNING AND OBJE
Page 595 and 596:
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
Page 617 and 618:
SEC. 15.14] DETAILED DESIGN OF THE
Page 619 and 620:
SEC. 15.14] DETAILED DESIGN OF THE
Page 621 and 622:
,/ / /“)4 Providenc~ (b) Fm. 16.1
Page 624 and 625: 624 EXAMPLES OF RADAR SYSTEM DESIGN
Page 626 and 627: CHAPTER 16 MOVING-TARGET INDICATION
Page 628 and 629: 628 MOVING-TARGET INDICATION [SEC,
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Page 632 and 633: 632 MOVING TARGET INDICATION [SEC.
Page 646 and 647: . 646 MOVING- TARGET INDICATION [SE
Page 648 and 649: 648 MOVING- TARGET lNDICA TION [SEC
Page 652 and 653: 652 MOVING-TARGET INDICATION [SEC 1
Page 656 and 657: 656 MOVING-TARGET INDICATION [SEC.1
Page 658 and 659: 658 When o = Othe instead MOVING-TA
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Page 670 and 671: 670 MO VINGTARGET INDICATION [SEC.
Page 672 and 673: 672 MOVING TARGET INDICATION [SEC.1
Page 676 and 677: 676 MOVING-TARGET INDICATION ~SEC.
Page 680 and 681: CHAPTER 17 RADAR RELAY BY L. J. HAW
Page 682 and 683: 682 RADAR RELAY [SEC. 172 transmitt
Page 684 and 685: 684 RADAR RELAY [SEC. 17.3 staggeri
Page 686 and 687: 686 RADAR RELAY [SEC. 17.4 excluded
Page 688 and 689: 688 RADAR RELAY [SEC. 174 long sign
Page 690 and 691: h Video I 1 I Angle marks RADAR REL
Page 692 and 693: 692 [SEC. 175 ḇ 1 1 1 I ~ LKal tr
Page 694 and 695: 694 RADAR RELAY [SEC. 17.5 generato
Page 696 and 697: 696 RADAR RELAY [SEC. 17.6 station
Page 698 and 699: 698 RADAR RELAY [SEC. 17.6 Video si
Page 700 and 701: 700 RADAR RELAY [SEC. 176 train. Th
Page 702 and 703: 702 RADAR RELAY [SEC.17.7 be obtain
Page 704 and 705: 704 RADAR RELAY @EC. 17.7 illustrat
Page 706 and 707: [11 1 Bas,c pulse I %e pulse i ~--.
Page 708 and 709: 708 RADAR ltELA Y [SEC. 1743 wave f
Page 710 and 711: 710 RADAR RELAY [SEC. 17.8 actual m
Page 712 and 713: . 712 RADAR RELAY [SEC. 17.9 Such a
Page 714 and 715: 714 RADAR RELAY [SEC. 17.10 between
Page 716 and 717: 716 RADAR RELAY [SEC. 17.10 signal
Page 718 and 719: 718 RADAR RELAY [SEC. 17.11 suppres
Page 720 and 721: 720 RADAR RELAY [SEC. 17.12 provide
Page 722 and 723: 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
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734 RADAR RELAY [f+iEc.17.16 The vi
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Index A Absorbent materials, 69 Abs
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INDEX 739 B-scope, electrostatic, 5
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INDEX 741 Fairbank, W. M.,80 F Fan
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INDEX ’743 Microwave, reason for
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INDEX 745 Radar, pulse,3 range perf
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INDEX 747 Signal, interference of,
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Radar System Engineering

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