ekS - Instytut Agrofizyki im. Bohdana DobrzaÅskiego PAN w Lublinie ...
ekS - Instytut Agrofizyki im. Bohdana DobrzaÅskiego PAN w Lublinie ...
ekS - Instytut Agrofizyki im. Bohdana DobrzaÅskiego PAN w Lublinie ...
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It was shown by von Hippel [96] that for porous materials having negligible<br />
magnetic properties the bulk dielectric permittivity of the material, ε b , can be<br />
determined from the velocity, v, of propagation of EM wave, as:<br />
2<br />
1/ 2<br />
[<br />
( ω) 2<br />
1+<br />
( 1 tan δ )<br />
⎛ c ⎞ ε '<br />
ε b = ⎜ ⎟ = +<br />
⎝ v<br />
] (38)<br />
⎠ 2<br />
When tanδ