A
Advanced Automatic Crash Notification System (AACN), 12-13
Advanced Mobile Phone Service (AMPS), 15, 16
Aeronautical mobile satellite service, 25
Aeronautical mobile service, 24-25
Airborne direction finder (ADF), 35-36
Airborne radars
Doppler navigation, 59-60
military multiple function, 61
side-looking, 61-62
terrain-following, 61
weather-avoidance, 58-59
See also Radars
Air-core loop antennas, 302-4
Air traffic control radar beacon system (ATCRBS), 39
American digital cellular (ADC) system, 15
Amplifiers, 149-63
BJT, 417-26
collector-modulated class C transistor, 178-79
common-base, 422-24
common-collector, 424-26
common-emitter, 417-22
coupled-cavity traveling-wave tube, 458
gain, 22
grid-modulated class C, 178
grid-type vacuum tube, 447-50
gyrotron, 462
helix-type traveling-wave tube, 45558
high-power transistor, 160
high-power vacuum tube, 445-64
IF, 155-57
LF, 157
multiple-cavity klystron, 453-55
plate-modulated class C, 177-78
RF, 149-55, 157-63
Amplitude modulation (AM), 122-23
detectors, 192, 193
modulators for, 177-79
See also Modulation
Analog-to-digital converter (ADC), 46, 137
Angle measurements, 73-74
defined, 73
pointing errors, 73
Antenna arrays, 322-30
broadside line, 324-25
end-fire line, 322-24
frequency-scanned, 328-29
mechanically scanned, 326-29
patch, 338
phase-scanned, 327-28
planar, 326
scanning methods, 326-30
with space feeds, 329-30
Antenna gain, 22
beam angle relationship, 287
dipole antennas, 296
power vs. directional, 287
Yagi-Uda antenna, 300
Antennas, 83-84, 287-338
aperture-type, 288
corner reflector, 330
dipole, 292-99
ERP, 288
flat-plate reflector, 330
helical, 304-6
hoghorn, 332
horn, 318-20
isotropic, 287
lens, 320-22
log-periodic,...
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