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Model 1P620
Rev C
Insertion Loss and Power Derating Curves
Typical Insertion Loss Derating Curve for 1P620S
-0.3
-0.25
-0.2
-0.15
-0.1
-0.05
0
-100 -50 0 50 100 150 200 25
Temperature of the Part (
o
C)
Insertion Loss (dB)
typical insertion loss (f=2700Mhz)
1P620 Power Derating Curve
0
5
10
15
20
25
30
35
40
0 50 100 150 20
Mounting Interface Temperature (
o
C)
Power (Watts)
85
Insertion Loss Derating:
The insertion loss, at a given frequency, of a group of
couplers is measured at 25°C and then averaged. The
measurements are performed under small signal
conditions (i.e. using a Vector Network Analyzer). The
process is repeated at 85°C and 150°C. A best-fit line
for the measured data is computed and then plotted
from -55°C to 150°C.
Power Derating:
The power handling and corresponding power derating
plots are a function of the thermal resistance, mounting
surface temperature (base plate temperature),
maximum continuous operating temperature of the
coupler, and the thermal insertion loss. The thermal
insertion loss is defined in the Power Handling section of
the data sheet.
As the mounting interface temperature approaches the
maximum continuous operating temperature, the power
handling decreases to zero.
If mounting temperature is greater than 95°C, Xinger
coupler will perform reliably as long as the input power
is derated to the curve above.
