Model XC2100A-20
Rev D
Definition of Measured Specifications
Parameter
Definition
The impedance match of
the coupler to a 50Ω
system. A VSWR of 1:1 is
optimal.
The impedance match of
the coupler to a 50Ω
system. Return Loss is
an alternate means to
express VSWR.
At a given frequency (ω
n
),
coupling is the input
power divided by the
power at the coupled
port. Mean coupling is
the average value of the
coupling values in the
band. N is the number of
frequencies in the band.
The input power divided
by the sum of the power
at the two output ports.
The input power divided
by the power at the direct
port.
The power at the
coupled port divided by
the power at the isolated
port.
The decibel difference
between the maximum in
band coupling value and
the mean coupling, and
the decibel difference
between the minimum in
band coupling value and
the mean coupling.
Mathematical Representation
VSWR =
VSWR
(Voltage Standing Wave Ratio)
V
max
V
min
Vmax = voltage maxima of a standing wave
Vmin = voltage minima of a standing wave
Return Loss
Return Loss (dB)= 20log
VSWR
+
1
VSWR - 1
⎛
P
in
(
ω
n
)
⎞
⎟
⎜
P
(
ω
)
⎟
⎝
cpl n
⎠
Coupling (dB) =
C
(
ω
n
)
=
10 log
⎜
Mean Coupling
Mean Coupling (dB) =
∑
C
(
ω
n
=1
N
n
)
N
Insertion Loss
10log
P
in
P
cpl
+
P
direct
Transmission Loss
10log
P
in
P
direct
P
cpl
P
iso
Directivity
10log
Frequency Sensitivity
Max Coupling (dB) – Mean Coupling (dB)
and
Min Coupling (dB) – Mean Coupling (dB)
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Toll Free:
Europe:
(315) 432-8909
(800) 411-6596
+44 2392-232392
Available on Tape and
Reel for Pick and Place
Manufacturing.
ANAREN [ ANAREN MICROWAVE ]
