12
εs = 10.4
10
εoo = 2.7
frel = 3 GHz
σ = 0.25
8
Upper Real Part
Lower Imaginary Part
6
σ = 0.04
4
2
σ = 0.025
0
8
9
10
11
10
10
10
10
Frequency (Hz)
a. Dielectric permittivity curves.
4
10
3
10
2
10
σ = 0.04
σ = 0.025
1
10
8
9
10
11
10
10
10
10
Frequency (Hz)
b. Attenuation rates.
Figure 11. Dielectric permittivity curves and attenuation rates for the average
ε′, range of σ, and probable values of frel and εoo at JPG. A dielectric relax-
ation at about 3 GHz strongly increases β above about 300 MHz, yet wave
velocity (determined by the real part of εs*) remains constant to about 600
MHz.
16
Previous Page
