IEEE 211-2018 pdf free download – IEEE Standard Definitions of Terms for Radio Waves Propagation.
NOTF—Samrtiinrs the definition is further restricted to a given polanrarirn stare, as in degree of I inear pokri’ation
dab; spread: See time dda spread (0,)
depolarization: A process by which the polarization state of a wave is altered
dlamag.etlc material: A material that is weakly repelled by a magnetic field that is applied on it. Diamagnetic inatenals are not magnetized in the absence of an applied static magnetic field and have a small negative magnetic susceptibility, All materials eshihil sotne dielectric eutsstaat. See, nd,atls’e euniples permatittisIty (c,)
dllfrat’tnl nasi. An cla-troiii;inetsc wave that has 1,veii ntodiflcd b’s an obstacle or sr&itzal izzkioiiiticnnty in the medium by means other than reflection a refraction.
dltfractloa The dc’s ianoat of the directasitof energy flow of a wave, not attributable to reflection or refiaction, when it passes an obstacle, a restricted aperttare, or other inhotnogenietses in a medium.
diffuse field. For random media, the non-coherent component of the scattered field, NOTE The diffuie electrcanagsrtr field has a zcin avenge saint, lie., it isa zern-mnninprocea). diffuse luteusit’,: l’cnscT iet’its a’,isiatcst nil the .trru’,e liekl.
diffuse reflection See diffuse scattering
diffuse seatterl.g The generation of non-coherent tdtffuset fields caused by scattering of an incident clet-lr’tn;ignetie wave by a random rough ttmafaee or a nsediuan randomly varying with time andtir space.
diffusion approsimatiomi’ For wave propagation in lousy media, it corresponds to neglecting the displacement cut rent.
direct wave A wave propagated over an unobstructed my path from a sosirce to a point
direetiou of polarizalisu (of an elliptically polarized wave). The direction of the major axis of the electric vector ellipse. Sir aires elliptieall polanred wave.
dlreetiou of propagation At any point in a med itim. the direction of the time-averaged energy flow, See also Pn nttng sector.
flirieblet Isoundan’ condition: A boundary ettndttson applied to the solution ol a partial d.tThrenttal equation in a ltictm Use function ts spccifrcd on the boutidazy.
NOTE When ajwlsed to the wase cqaatzis for electromagnetic fields. it requirn cenissuity of the tangestial field einnpcusents sousa the houn&say.
dlapersloit. (of a wave) The satiation of the phase selocity with frequency.
dispersion relarlo.IEEE 211 pdf download.