
Model XC0900A-03
Rev C
Insertion Loss and Power Derating Curves
0
Typical Insertion Loss Derating Curve for XC0900A-03
350
Power Derating Curve for XC0900A-03
-0.02
-0.04
-0.06
-0.08
-0.1
-0.12
-0.14
-0.16
-0.18
typical insertion loss (f=894MHz)
typical insertion loss (f=960MHz)
typical insertion loss (f=1000MHz)
325
300
275
250
225
200
175
150
125
100
75
50
25
power handling at 894MHz
power handling at 960MHz
power handling at 1000MHz
-0.2
-100
-50
0
50
100
150
200
250
300
350
0
0
25
50
75
100
125
150
175
200
225
Temperature of the Part (oC)
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 95 ° C, 150 ° C, and 200 ° C. A best-
fit line for the measured data is computed and then
plotted from -55 ° C to 300 ° C.
Base Plate Temperature (oC)
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.
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