"Dear Dr. Dunsmore,Thank you so much for the information. Please bear with my ignorance with the calibration. TRL looks not so simple to me.For example, if I am trying to develop a TRL kits for 40 to 60GHz band on wafer, what should I do?Thru:How do I decide the "Through" line length and its width? Is it an arbitary line length to use 300um, 400um, or any other length? What are the considerations in deciding what physical length to use?"
"How about its width, should I set the width to make the line impedance 50 ohms? Where is my reference plane, is it always the center of the "Thru" line? How can I tell where the reference plane is at?"
"Line:Why the "Line"'s length has to be 20 to 160 deg longer than the "Thru" line length? Is the 20 to 160 deg calculated at the center frequency of the band? Is it at geometric average or arithematic average frequency?"
"After I decide on the "Thru" and "Line" dimensions for a user wafer, how do I find out their parameters to type into PNA? What type of parameters are needed to type into PNA? Do I need to run EM simulation to retrieve those parameters? "
"So for on wafer kits development, I only need to layout two structures as on-wafer standards, one line as "thru", and another as "line"? I don't need to have a structure for "reflect". Somehow, I saw some papers have multiple structures (>2)."
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