Model XC1900A-03
Rev D
Application Information
The XC1900A-03 is an “X” style 3dB (hybrid) coupler. Port configurations are defined in the table on page 2 of this data
sheet and an example driving port 1 is shown below.
Ideal 3dB Coupler Splitter Operation
1V
Isolated Port
1
2
4
3
0.707V ∠θ (-3dB)
0.707V ∠θ -90 (-3dB)
The hybrid coupler can also be used to combine two signals that are applied with equal amplitudes and phase
quadrature (90o phase difference). An example of this function is illustrated below.
Ideal 3dB Coupler Combiner Operation
0.707V ∠θ
0.707V ∠θ -90
1
2
4
3
Isolated Port
1V ∠ Φ
3dB couplers have applications in circuits which require splitting an applied signal into 2, 4, 8 and higher binary
outputs. The couplers can also be used to combine multiple signals (inputs) at one output port. Some splitting and
combining schemes are illustrated below:
2-Way Splitter/Combiner Network
Input
* 50 Ω
Termination
Amplitude and
Phase tracking
Devices
* 50 Ω
Termination
Output
Available on Tape
and Reel for Pick and
Place Manufacturing.
USA/Canada:
Toll Free:
Europe :
(315) 432-8909
(800) 411-6596
+44 2392-232392
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