Hi,
Now I am using the LF input signal into the near-surface. I see the good conductor results in the 45 degrees phase lags between the B field and the E field and when the frequency we choose is below the 100KHz the conductivity could be larger than the dielectric permittivity (see these information on the references). And then I think if I want to get the best conductivity rather than the permittivity, it is better to choose the characteristic frequency as the relaxation frequency which is the inverse of the relaxation time (this point the loss is maximum which I think the conductivity here is dominant).
for example, I have a two layer heterogeneous material, there could be interfacial polarization and the polar polarization.
1, Can I recognize that under the frequency 1MHz, the interfacial polarization is the dominant factor that means I can ignore the polar polarizaiton factor then I can just use the relaxation time formula of interfacial polarization to do the calculation?
2, I am reading few papers to try to find some information about the relaxation time formula, but I just did not get any. Could anyone give me some ideas or some suggestions on the references?
3, The phase lag means the loss because of the conductivity....but I do not know the deep meaning or implication. I mean what kind of influence would this phase lag between the B field and E field generates?
Thank you in advance.
Ting
When the frequency is that low, you can actually think it in terms of circuit elements with current and voltage sources respectively. If you can draw a circuit with L (& C), you would probably get an equivalent phase delay.
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