Origin of the Half-Wavelength Errors in Microwave Measurements Using Through–Line Calibrations

P. Mark Buff, Jayesh Nath, Michael B. Steer
2007 IEEE Transactions on Instrumentation and Measurement  
The through-line calibration family uses measurements of a through connection and an inserted line to determine the propagation constant of the line. This is typically used with measurements of a reflect standard to characterize fixturing errors. Subsequently, the S-parameters of a device under test are de-embedded. Measurement uncertainties occur at frequencies where the length of the line standard is an odd multiple of a half-wavelength. The origin of these errors is identified as fixture
more » ... fied as fixture inconsistencies between the through and the line measurements. Error formulations are developed, and it is shown that a small fixturing error can be accounted for as a multiplicative transmission error. An error sensitivity function is developed and highlights the importance of fixture repeatability.
doi:10.1109/tim.2007.904490 fatcat:agbrsxyhejatxn4fdtr2ckb7qu