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Radar System Engineering

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744 RADAR SYSTEM ENGINEERING<br />

Pillbox, 276<br />

Pip-matching, 203<br />

Plan-position indicator, 6, 167<br />

(See ah. PPI)<br />

Plotting board, 180°, 238<br />

verticrd, 235<br />

x-Y, 240<br />

Polyrod, 278<br />

Polyrod radiators, array of, 303<br />

Pound, R. V., 717, 724<br />

Power, for mobile radar, 585<br />

prime, supplies for radar, 555-587<br />

for radar, in aircraft, 555-583<br />

frequency of, 555<br />

recommendations for, 582<br />

at tied locations, 583<br />

for large systems, locally generated,<br />

584<br />

for shipborne systems, 586<br />

Power frequencies, in aircraft, standard,<br />

556<br />

Power supply, 3-phase a-c radar, 559<br />

for ultraportable equipment, 585<br />

vibrator, 581<br />

PPI, 167<br />

delayed, 169<br />

deeign of, 532-545<br />

off-center, 168<br />

open-center, 169<br />

pm-time-base resolution for, 544<br />

resolved-current, 538-545<br />

reached time bsse, 534–538<br />

rotating-coil, 534<br />

stretched, 170<br />

threAone, 553<br />

using automatic transmitter triggering,<br />

540<br />

PPI displays, contraat of, 54*554<br />

resolution of, 548-554<br />

Pre-plumbing, 408<br />

Prwwrization, of r-f lines, 283, 420<br />

PRF, choice of, 598<br />

Prime movers, small, 586<br />

Prime power supplies for radar (see<br />

Power, prime, supplies for radar)<br />

projector, chart, 215<br />

Propagation, free-space, 18<br />

of microwaves, over reflecting surface,<br />

47-53<br />

(sss ah. Microwave propagation)<br />

PSWR (see Standing-wave ratio, power)<br />

Pulse, phaae-shifted, 697<br />

sharp, generation of, 501-503<br />

pulse cable, 386<br />

pulse length, choice of, 596-598<br />

pulse modulation (see Modulation, polae)<br />

pulse packet, 122<br />

pulse power (see Magnetron, pulse power<br />

of)<br />

P@e-forming network (see Network,<br />

pulseforming)<br />

Pulse-modulated doppler system, 150-157<br />

Pulee-to-pulse cancellation, 631<br />

Pulse recurrence frequency (see PRF)<br />

Pulee transformers, 38L-386<br />

Puk3er, 353-390<br />

basic circuit, 356-36o<br />

driver circuit, 371<br />

energy sources of, 387<br />

hard-tube, 367-373<br />

hard-tube and linetype, comparison<br />

of, 3W363<br />

line-type, 358, 374-383<br />

a-c charging of, 383<br />

recharging circuit of, 382<br />

switches for, 377–381<br />

overload protection of, 364<br />

Pulser switch, 357<br />

for line-type pulsers, 377–381<br />

nonlinear inductance as, 381<br />

Pulser switch tubes, high-vacuum, 368<br />

Q<br />

Q, of cavity, 406<br />

Quarter-wave line (see Line, quarterwave)<br />

Quarter-wave plate, 84<br />

Racons, 246<br />

<strong>Radar</strong>, 419<br />

comparison of, with eye, 1<br />

C-W, 127–159<br />

comparison with pulse radar, 123<br />

ground, use of beacons with, 609<br />

history of, 13<br />

limitations of, 116-126<br />

R<br />

prime power supplies for (see Power,<br />

prime, supplies for radar)<br />

principle of, 3-6

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