Page 600 - Engineering Electromagnetics, 8th Edition

582 INDEX

Counterpropagating waves, surface, 182 Dielectric slab waveguides,
418 types of, 285 436, 464, 490, 495
Critical angle, 495 and wave propagation, 392 Differential current element,
Cross product, 11–13 Current directions in waves, 215, 232–235, 236–
Curl, 195–201, 554–556 309 238
Curl meter, 199 Current filaments, 191 Differential electric dipole,
Current Current per unit area 242
Amperian, 248 enclosed, 197 Differential vector magnetic
bound, 248 Current reflection diagrams, potential field, 215
carriers of, 126–127 350–351, 352 Differential volume element
conduction, 109, 286 Curvilinear coordinates, in circular cylindrical
continuity of, 111–113 553–556 coordinate system, 15
convection density, 111, Curvilinear-square maps, in rectangular coordinates,
233 157–159 5
described, 110–113 Curvilinear squares and in spherical coordinate
differential element, 215, streamlines, 157 system, 19, 20
232–235, 236–238 Cutoff conditions, 485–486 Differential-width line
direct, 189 Cutoff frequency, 465–466, charge, 39
displacement, 284–288 471 Dipole
displacement density, 285 Cutoff wavelength, 471–472, antennas, 511–517,
filamentary, 110, 195 503 523–524, 525
filaments, 191 Cylindrical conductor, 153 differential electric, 242
finite-length filament, 186 Cylindrical waveguides, 464 electric, 95–100
forces, 232–235, 236–238 Hertzian, 511–517,
as function of time, 357 546–547
Kirchoff’s law, 304 D magnetic, 241, 248,
negative, 309 Dc-circuit, 89 523–524
positive, 309 Decibels (dB), 319 point, 100
semi-infinite segments, 186 Del operator, 67–69 Dipole moment per unit
surface, 195 Dephasing process, 569 volume, 128, 248
total, 249 Depth of penetration, 389 Dipole moments, 97, 99, 100,
and voltage, relation Diamagnetic materials, 245 129, 241
between, 308 Dielectric, 48 Direct current, 189
wave directions, 309 Dielectric constant, 131, 461 Directivity function, 521
Current carriers, 126–127 Dielectric interface, 135 Discontinuities, 320–323
Current density Dielectric materials Dispersion parameter, 445
convection, 111, 233 boundary conditions for Dispersive media
described, 110–111 perfect, 133–137 pulse broadening in,
displacement, 285 and electric flux, 50 443–447
effect of increment of nature of, 127–133 wave propagation in,
charge on, 110 perfect, 133–137 437–443