I'm getting this error with Statistical 1.1.28: Run-time error '9': Subscript out of range The program then quits. The example files run fine so I'm thinking...
Dear Lou, There are some diagnostic tests that I can do here with the source code that you cannot do yourself. If you send me your data and menus, I can take a...
Hello, When I was doing experiments with Statistical and Multical some questions came up. I read in a former message of this forum that in one tier calibration...
... The two transmission terms are indeed different. As you observed, StatistiCAL reports both the mean and the ratio of the two transmission parameters....
In Figure 4 in the paper A Complete Multimode Equivalent-Circuit Theory for Electrical Design it has the series impedances of the transmission line as...
Dear Dylan, I started my measurement on silicon chip again using new probes which are specially designed for probing on Aluminium pads. I have a TRL cal...
Dear Riaz, To the best of my knowledge, the figure is correct. Recall that impedance and admittance matrices relate voltages and currents at the ports of a ...
Dear Fei, There are, of course, many possible reasons that these measurements can fail. Here are a few you might look at: 1) We have had great difficulty...
Dear Fei, The lines you have in your calibration set are quite long. When these lines are not measured, they are resonators at all frequencies where the length...
Has NIST ever investigated higher order modes in microstrip transmission lines? If so then has anything been published? A brief mention and a handful of...
... A colleague claims that Zc11 is the self impedance per unit length of conductor 1 and Zc21 is the self impedance per unit length of the groundplane....
... impedance ... The matrices Zc and Yc are 2x2 element matrices that fit into the Telegrapher's equations. An impedance or admittance matrix for a pair of...
... impedance ... would ... Collin's ... Is equation 36 in A Complete Multimode Equivalent-Circuit Theory for Electrical Design the same equation as equations...
... I was just trying to point out that there is not, in general, a direct element-by-element relationship between impedance matrices and equivalent-circuit...
... Again, I think that the figure is correct. The rest seems to be more a matter of definition, and you should be able to figure those out from the figure. ...
... ports of a ... their ... those ... Does an equivalent circuit of a section of two asymmetric lossy coupled lines over a lossy groundplane exist? I can't...
... Section 8 of D. F. Williams, L. A. Hayden, and R. B. Marks, "A Complete Multimode Equivalent-Circuit Theory for Electrical Design," NIST Journal of ...
... lines ... I have developed an equivalent circuit model for coupled lines which contains all the L, C, and G parameters and I think it is correct but I am...
Dear David, I think you are right about the discontinuities in calibrated measurements. The long line indeed exceed half wavelength if the effective...
Dear Dylan, Thanks for your reply. As you might have noticed, David pointed a possible cause of the discontinuities in measurements. The probes I am currently...
If a DUT is embedded between two identical feed lines, its S parameters may be measured in two ways: 1. Directly, by locating the reference plane at the...
... I think that it is important to add that the multiline TRL calibration can be applied to this measurement problem if the designer includes lines of ...
... calibration can ... lines of ... different ... restriction ... lines. ... It might be useful (if time permits at NIST) to evaluate the accuracy of this...
... Dear Kristoffer, I believe that the actual parameter reported is sqrt(S12*S21). The StatisitiCAL help files have a short discussion of this under the...
Hi, I am trying to measure thru line loss on high resistivity silicon(>5000 ohm-cm) over 0.8-30G range. I have thru-lines of 1mm, 2mm and 0.5mm length on the ...
Dear Kaustubh, In general, you should be able to see differences in S21 for each line length. Of course, if your lines are very low loss, you have to have a ...
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