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4-port measurement using 2-port NA (loading not possible)

Question asked by wangyt on Dec 14, 2006
Latest reply on Dec 22, 2006 by Dr_joel
I will have some difficulties in measuring a coupler using 2-port 8362 (or 8722, or 8510). The testing will be based on an on-wafer station with GSG coplanar probes. Due to the geometry of the device, it is practically difficult to load the ports with 50ohm in measuring the scattering parameters. 

Anybody have any idea or experience of the possible solution? Will an error-correction algorithm possibly do if the unused ports are left open and all combinations of 2-port S-parameters are taken? Or, will an extended test module do?

Any suggestions are appreciated.

With regards