DC1722J5020AHF Datasheet, PDF (5/8 Pages) Anaren Microwave – Ultra Low Profile 0805 20dB Directional Coupler

Model DC1722J5020AHF
Rev C
Definition of Measured Specifications
Parameter
Definition
Return Loss
Mean Coupling
Insertion Loss
Transmission
Loss
Directivity
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.
Mathematical
Representation
for Pin Configuration 1
Return Loss (dB)=
20 log₁₀ (
S
ii
)
i = 1, 2, 3, 4
Coupling (dB) =
C
= 20 log₁₀
S
34
Mean Coupling (dB) =
N
∑ ^C(ωn ⁾
n=1
N
2
2
10
log₁₀
(
S
14
+S
34
)
20 log₁₀
(
S
14
)
S
20 log₁₀ (
24
S
)
34
Frequency
Sensitivity
The decibel difference
between the maximum in
band coupling value and
the minimum in band
coupling value.
(Max Coupling (dB) – Min
Coupling (dB))/2
Mathematical
Representation
for Pin Configuration 2
Return Loss (dB)=
20 log₁₀ (
S
ii
)
i = 1, 2, 3, 4
Coupling (dB) =
C
= 20 log₁₀
S
21
Mean Coupling (dB) =
N
∑ ^C(ωn ⁾
n=1
N
2
2
10
log₁₀
(
S
41
+S
21
)
20
log₁₀
(
S
41
)
S
20 log₁₀ (
31
S
)
21
(Max Coupling (dB) – Min
Coupling (dB))/2
*100% RF test is performed on configuration 1 where port 1 is connected to pin1, port 2 is connected to pin 2, port 3 is connected to pin 5 and port 4 is
connected to pin 6.
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