XC0900A-05 Datasheet, PDF (3/21 Pages) Anaren Microwave – 5 dB Directional Coupler

Insertion Loss and Power Derating Curves
Typical Insertion Loss Derating Curve for XC0900A-05
0
typical insertion loss (f=894MHz)
-0.02
typical insertion loss (f=960MHz)
typical insertion loss (f=1000MHz)
-0.04
-0.06
-0.08
-0.1
-0.12
-0.14
-0.16
-0.18
-0.2
-100 -50 0 50 100 150 200 250 300 350
Temperature of the Part (ºC)
Model XC0900A-05
Rev D
Power Derating Curve for XC0900A-05
350
325
power handling at 894MHz
power handling at 960MHz
300
power handling at 1000MHz
275
250
225
200
175
150
125
100
75
50
25
0
0 25 50 75 100 125 150 175 200 225 250 275 300
Base Plate Temperature (ºC)
Insertion Loss Derating:
Power 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.
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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