Why are the correct calibration kits coefficients so important?

This question has been answered in some other documents, but as a quick summary

  1. The VNA and connecting cables means the VNA can not measure a device under test even remotely accurately. A true impedance of 20 + j 30 Ω may well be shown as 800 - j 40 Ω.
  2. The VNA derives a set of correction coefficients, from measurement of calibration standards.
  3. If the coefficients of the standards are not properly known, the error correction coefficients will not be computed properly
  4. Unless the correction coefficients are computed corrected, the results are meaningless.

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