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In telecommunication, ground constants are … In telecommunication, ground constants are the electrical parameters of earth: electrical conductivity, σ, electrical permittivity, ε, and magnetic permeability, μ. The values of these parameters vary with the local chemical composition and density of the Earth. For a propagating electromagnetic wave, such as a surface wave propagating along the surface of the Earth, these parameters vary with frequency and direction.ameters vary with frequency and direction.
, 接地常數為一電信名詞，是指土壤的電氣相關參數，例如電導率、电容率及磁导率。 接地常數會隨各地區的土壤化學成份以及密度而不同。若是在探討電磁波的傳遞，例如由地表傳播的表面波，這些參數也會隨方向及頻率而不同。
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| rdfs:comment |
In telecommunication, ground constants are … In telecommunication, ground constants are the electrical parameters of earth: electrical conductivity, σ, electrical permittivity, ε, and magnetic permeability, μ. The values of these parameters vary with the local chemical composition and density of the Earth. For a propagating electromagnetic wave, such as a surface wave propagating along the surface of the Earth, these parameters vary with frequency and direction.ameters vary with frequency and direction.
, 接地常數為一電信名詞，是指土壤的電氣相關參數，例如電導率、电容率及磁导率。 接地常數會隨各地區的土壤化學成份以及密度而不同。若是在探討電磁波的傳遞，例如由地表傳播的表面波，這些參數也會隨方向及頻率而不同。
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| rdfs:label |
Ground constants
, 接地常數
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