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Measurement, Instrumentation, and Sensors Handbook, Second Edition, 2nd Edition
book

Measurement, Instrumentation, and Sensors Handbook, Second Edition, 2nd Edition

by John G. Webster, Halit Eren
February 2014
Intermediate to advanced content levelIntermediate to advanced
1921 pages
82h 13m
English
CRC Press
Content preview from Measurement, Instrumentation, and Sensors Handbook, Second Edition, 2nd Edition
37-11Permittivity Measurement
where
f z
e
r
e
r
e
r
j r j r j r
( ) cos( )= +
β β β
β
d d d
d
1 2
1 2
2
(37.37)
r z a
1
2 2
= +( )
(37.38)
r z a
2
2 2
= + +( )
(3
7
.39
)
r z a= +
2 2
(3
7
.40
)
ωµ
β
µ
ε
η
0
d
0
Intrinsic impedance of the medium= = =
*
(37.41)
ε ε ε
σ
ωε
* =
0
0
r
j
(37.42)
β ω µ ε
d 0
2 2
= *
(37.43)
Since
th
e
in
put
im
pedance
Z
in
is known precisely aer measurement, Equation 37.36 can be solved
nu
merically
fo
r
co
mplex
β
d
using a root-nding routine. e material characteristics are then deter-
mined
f
rom
E
quations
3
7
.42 a
nd
3
7
.43.
37.3.4 Nondestructive Method for Measuring
theComplex Permittivity of Materials
Most of the techniques described thus fa ...
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Publisher Resources

ISBN: 9781439848913