wizardz
Member level 2
test balun
I want to test some three port on-chip baluns using two-port network analyzer.
The test results should include the insertion loss, coupling coefficient, amplitude and phase inbalance. So a simple connection as a two port transformer in test is not adequate.
Some papers indicate that typical test set up include:
1. test each partial two port with a third port terminated with a 50 Ohm terminator.
2. test each partial two port with a third port open, (I don't know whether this works, but a paper used this way)
3. some combination of back to back connection of balun. Maybe the insertion loss is easily obtained, but I wonder whether amplitude or phase imbalance information is included?
If any one has some balun test experience and can help me, I would be high appreciated.
I want to test some three port on-chip baluns using two-port network analyzer.
The test results should include the insertion loss, coupling coefficient, amplitude and phase inbalance. So a simple connection as a two port transformer in test is not adequate.
Some papers indicate that typical test set up include:
1. test each partial two port with a third port terminated with a 50 Ohm terminator.
2. test each partial two port with a third port open, (I don't know whether this works, but a paper used this way)
3. some combination of back to back connection of balun. Maybe the insertion loss is easily obtained, but I wonder whether amplitude or phase imbalance information is included?
If any one has some balun test experience and can help me, I would be high appreciated.