Keysight E4980A User Manual page 188

Measurement Procedure and Examples
Impedance Parameters
Figure 7-2 Definition of Impedance
The following parameters can be used to represent the reactance.
X
where
f
L
In addition to these parameters, the Quality Factor (Q) and Dissipation Factor
(D) are used to describe the quality of components.
Q
where
Q
D
In some case, for the inverse of impedance (Admittance), Y is used.
shows the vector representation of admittance. As with Z (Impedance), Y
contains a real and an imaginary part, and it is expressed in rectangular form
as Conductance and Susceptance, or in polar form as magnitude of
Admittance and Phase. The following are expressions for Admittance.
Y
188
2fL
=
Test frequency [Hz]
Inductance [H]
1 X
-- - ----- -
= =
D R
Quality Factor
Dissipation Factor
1
--
=
Z
Keysight E4980A/AL Precision LCR Meter
Figure 7-3