Model X3DC21E2S
Rev A
Doherty Amplifier Configuration
Offset line
RF input
Main Amp
90°
RF output
NC
35
90°
Peak Amp
Anaren Doherty
Combiner
50
Port Extension
Doherty Combiner Pin Configuration
The X3DC21E2S has an orientation marker to denote Pin 1. Once port one has been identified the other ports are
known automatically. Please see the chart below for clarification:
Pin 4
50
Pin 1
Pin 3
50
90°
35
Pin 2
Pin 1
Combining Port
Pin 2
Not Used
Pin 3
Peak Amp Port
Pin 4
Main Amp Port
There are inevitably short lines associating with input ports in some high frequency band parts. The length of the
short line is specified as electrical length at center frequency and noted as port extension in this datasheet. The
designer should take this length into the consideration to optimize the offset line length.
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