Measure input match, each transmission path and output isolation with the unused ports terminated according to the divider's specification.
How it works in practice
A two-port VNA can characterize a three-port device through separate connections, but changing connections introduces uncertainty. Keep reference planes consistent and use appropriate terminations. Measure relative amplitude and phase over the required band, not just a single point.
Example and interpretation
S21 and S31 describe separate input-to-output paths when port 1 is the input and the numbering matches the device definition.
Checks before use
- Document port numbers
- Calibrate the interfaces
- Terminate the unused port
- Measure every required path
Important limit
Do not leave a third port open unless that is the specified test condition.
Related Centron RF product
RF power divider range. Compare the exact divider model, port count and current datasheet. Some catalog titles show inconsistent frequency ranges, so confirm the supplied model’s full passband, loss, isolation and power limits before selection.
Further reading
Mini-Circuits: Understanding Power Splitters. This background reference explains general principles; the selected Centron RF model’s datasheet governs its own ratings.
Related guides
Educational guide. Numerical examples use the stated assumptions and are not test results for a supplied unit.