GW Instek LCR-8101, Руководство пользователя, Страница: 20 / 59

BASIC MEASUREMENT
39
Quality factor (Q) and Dissipation factor (D)
Background
Both Quality factor and its reciprocal, Dissipation
factor, are used for measuring the rate of energy
dissipation relative to the measurement frequency.
•
Low energy dissipation: high Q, low D
•
High energy dissipation: low Q, high D
Type Quality factor (Q) Dissipation factor (D)
Range
0.01m Ω ~ 1G Ω 0.001nS ~ 1GS
Formula
S S S
S
R C R
L
Q
ϖ
ϖ
1
= =
P P
P
P R C
L
R
ϖ
ϖ
= =
( )
D
1
90 tan
1
=
−
=
°
θ
S S
S
S
R C
L
R
D
ϖ
ϖ
= =
P P
P
P G L
C
G
ϖ
ϖ
= =
( )
Q
1
90 tan
= − =
° θ
LCR-8101 User Manual
40
Angle (
θ
)
Background
The Angle ( θ ) measures the phase on which
Impedance (Z), Admittance (Y), Quality factor (Q),
and Dissipation factor (D) are measured.
Type Angle ( θ )
Range
–180° ~ +180°
Formula jX R Z
S
+ =
C
j
R L j R
ϖ
ϖ − = + =
( )
D
Q
1
90 tan
1
=
−
=
°
θ
θ
cos Z R
S
=
θ
sin Z X
S
=
jB G Y
P
+ =
L
j
G C j G
ϖ
ϖ
− = + =
( )
Q
D
1
90 tan
= − =
°
θ
θ
cos Y G
P
=
θ
sin Y B
P
=