Agilent Technology has an excellent downloadable guide on impedance measurement, The Impedance Measurement Handbook.    It may have something in there.    I've  used several TDR's but never on a waveguide.   

Pat Goodyear 
6 working days. 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Louis Hart
Sent: Wednesday, September 18, 2013 9:01 AM
To: [log in to unmask]
Subject: [TN] impedance measurements for coplanar waveguide

Technetters, how does one make impedance measurements on what I think is a grounded coplanar waveguide?

The configuration is, in one plane, what appears to be a signal trace flanked by two much larger conductors.

I have a Tektronix time domain reflectometer with P8018 (for single-ended impedance) and P80318 (for differential impedance) probes.

I called Tektronix, from which I have gotten excellent information in the past on other matters, but the technical support could not advise on this matter.

Thanks for any insight.

Louis Hart
Compunetics
Monroeville, PA
USA
[log in to unmask]<mailto:[log in to unmask]>
412-858-1232


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