AnsweredAssumed Answered

Equation for offset loss (Ap 1364-1)

Question asked by friendlyaggie on Apr 14, 2009
Latest reply on Oct 29, 2009 by observers
I'm doing a TRL calibration for the first time and I came across Ap 1364-1 (page 12). Is that formula correct? The example it goes through doesn't seem to add up. What are the units supposed to be for that formula?
What I assume:

Offset loss= IL[dB] * c *sqrt(er) *Z0/ (10 *log(e) *L)
er=permittivity=4.3
c=3e8
Z0=50
e=exp(1)
L=3in *.0254meters/in
IL @ 4.5GHz ~ 1.25dB

Problem's offset: 10 Gohms/s
My calculation from that formula:1.12789e+11 Gohms/s

http://ece.uprm.edu/~colom/de-embedding.pdf

Outcomes