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Area Radio wave propagation / Electromagnetic properties of propagation media

IEV ref705-03-09

en
conducting medium
the medium in which a variable electric field produces an electric current density vector J MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz3bqee0evGueE0jxyaibaieYdi9WrpeeC0lXdi9qqqj=hEeeu0lXdbba9frFj0xb9Lqpepeea0xd9s8qiYRWxGi6xij=hbba9q8aq0=yq=He9q8qiLsFr0=vr0=vr0db8meWabaGacmaadaWaaiWabaabaiaafaaakeaadaWhcaqaaiaadseaaiaawEniaaaa@3C07@ whose magnitude in a given direction is large relative to that of the vector D t MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz3bqee0evGueE0jxyaibaieYdi9WrpeeC0lXdi9qqqj=hEeeu0lXdbba9frFj0xb9Lqpepeea0xd9s8qiYRWxGi6xij=hbba9q8aq0=yq=He9q8qiLsFr0=vr0=vr0db8meWabaGacmGadiWaaiWabiabciaafiaakeaadaWcaaqaaiabgkGi2oaaFiaabaGaamiraaGaay51GaaabaGaeyOaIyRaamiDaaaaaaa@3FE6@ in a particular frequency band

Note 1 – For a sinusoidal wave in an isotropic medium, the medium is conductive if the following relation is satisfied:

σ ε 0 ω ε r MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz3bqee0evGueE0jxyaibaieYdi9WrpeeC0lXdi9qqqj=hEeeu0lXdbba9frFj0xb9Lqpepeea0xd9s8qiYRWxGi6xij=hbba9q8aq0=yq=He9q8qiLsFr0=vr0=vr0db8meqabaGacmGadiWaaiWabiabciaafiaakeaadaWcaaqaaiabeo8aZbqaaiabew7aLnaaBaaaleaacaqGVbaabeaakiabeM8a3baacqWIRjYpcuaH1oqzgaqbamaaBaaaleaacaGGYbaabeaaaaa@4433@

where ε r MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGe aGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaq Fn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpe WZqaaeaaciWacmGadaGadeaabaGaaqaaaOqaaiabew7aLnaaDaaale aacaqGYbaabaGaaiOkaaaaaaa@38C7@ is the relative real permittivity, ε0 is the electric constant, σ is the conductivity, ω is the angular frequency.

Note 2 – An anisotropic medium may be conducting only in certain directions.


fr
(milieu) conducteur, m
milieu dans lequel un champ électrique variable produit un vecteur densité de courant électrique J MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz3bqee0evGueE0jxyaibaieYdi9WrpeeC0lXdi9qqqj=hEeeu0lXdbba9frFj0xb9Lqpepeea0xd9s8qiYRWxGi6xij=hbba9q8aq0=yq=He9q8qiLsFr0=vr0=vr0db8meWabaGacmaadaWaaiWabaabaiaafaaakeaadaWhcaqaaiaadseaaiaawEniaaaa@3C07@ , dont la projection selon une direction donnée a une norme grande par rapport à celle de la projection du vecteur D t MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz3bqee0evGueE0jxyaibaieYdi9WrpeeC0lXdi9qqqj=hEeeu0lXdbba9frFj0xb9Lqpepeea0xd9s8qiYRWxGi6xij=hbba9q8aq0=yq=He9q8qiLsFr0=vr0=vr0db8meWabaGacmGadiWaaiWabiabciaafiaakeaadaWcaaqaaiabgkGi2oaaFiaabaGaamiraaGaay51GaaabaGaeyOaIyRaamiDaaaaaaa@3FE6@ , dans une bande de fréquence déterminée

Note 1 – Dans un milieu isotrope, la propriété d'être conducteur se traduit en régime sinusoïdal par la condition:

σ ε 0 ω ε r MathType@MTEF@5@5@+=feaagCart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHXgaruavP1wzZbItLDhis9wBH5garmWu51MyVXgaruWqVvNCPvMCG4uz3bqee0evGueE0jxyaibaieYdi9WrpeeC0lXdi9qqqj=hEeeu0lXdbba9frFj0xb9Lqpepeea0xd9s8qiYRWxGi6xij=hbba9q8aq0=yq=He9q8qiLsFr0=vr0=vr0db8meqabaGacmGadiWaaiWabiabciaafiaakeaadaWcaaqaaiabeo8aZbqaaiabew7aLnaaBaaaleaacaqGVbaabeaakiabeM8a3baacqWIRjYpcuaH1oqzgaqbamaaBaaaleaacaGGYbaabeaaaaa@4433@

ε r MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbbjxAHX garuavP1wzZbItLDhis9wBH5garmWu51MyVXgarqqtubsr4rNCHbGe aGqipG0dh9qqWrVepG0dbbL8F4rqqrVepeea0xe9LqFf0xc9q8qqaq Fn0lXdHiVcFbIOFHK8Feea0dXdar=Jb9hs0dXdHuk9fr=xfr=xfrpe WZqaaeaaciWacmGadaGadeaabaGaaqaaaOqaaiabew7aLnaaDaaale aacaqGYbaabaGaaiOkaaaaaaa@38C7@ est la permittivité relative réelle, ε0 est la constante électrique, σ est la conductivité, ω est la pulsation.

Note 2 – Un milieu anisotrope peut n'être conducteur que dans certaines directions.


ar
وسط موصل

de
leitendes Medium, n

es
medio conductor

it
mezzo conduttore

ko
도전 매질

ja
導電媒質

pl
środowisko przewodzące

pt
(meio) condutor

sv
ledande medium

Publication date: 1995-09
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