| Products > Test Equipment |
| SVA1032X - S11 in ohms and phase |
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| trampas:
So I wanted to measure the impedance of a sensor in ohms/degrees for a sensor using the SVA1032X. I was wondering if I was correct in setting up the VNA to do a polar graph in "Lin/Phase" and then assume the linear in conductivity (U) needs multiplied by 50ohm source impedance to get the magnitude in ohms? Also does anyone happen to have a python script that might automate getting this measurement? Thanks |
| virtualparticles:
If you are measuring the Reflection Coefficient (G) of the unknown, and calibration has been performed such that the reference plane is at the unknown, then the complex impedance is Z0*(1+G)/(1-G) where Z0 is the characteristic impedance, usually 50 ohms and G is the complex reflection coefficient, best expressed in rectangular coordinates for ease of adding and subtracting from "1". See the attached article for the three common ways to make the measurement. |
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