With an SSST calibration the three shorts together determine all of the reflectivities error terms (directivity, source match and reflection tracking). This calibration is more band-limited than the double offset short method. If short1 is defined as having the smallest offset length, and short3 to the longest offset length, then two variables can be defined:
(Eq. 5-1)
The electrical length equivalents of A and B should generally be between 20 and 85 degrees over the frequency range of interest. This is not sufficient in itself since one will also require that A+B (which represents the difference between short1 and short3) also be constrained:
(Eq. 5-2)
Since the only standards needed are shorts, this method is attractive for mm-Wave applications and for certain board-level and wafer-level calibrations where other types of standards are difficult to manufacture.
Typical parameters for Triple Offset Short calibration - SSST - Coaxial
For one port calibrations, only one of the port definitions (unless reflection-only calibrations are being performed for both ports 1 and 2) will be present and the through line section will not be present. For a 1 path-2 port calibration, one of the port definition sections will not be present.
STANDARD INFO (TRIPLE OFFSET SHORT) Information Dialog Box
Typical parameters for SSST calibration - W1 (F) Connectors
