Dear Bert, If you are saying that there is a 6 dB error in S11 where |S11| is near to one, that does not sound reasonable at all. I would expect a few tenths...
Dear Bert, Regardless of 6dB errors etc., at such a low frequency, I suggest to setup a measurement with a signal generator and a scoop or spectrum analyzer,...
Hi Bert, The S11 measurement method's accuracy is optimized near 50ohms impedance. The thumb rule is that we have to be cautious about any measurement reported...
Hi, the 6 dB error I see indeed is on the impedance and not on S11, which makes sense when S11 approaches 1. The reason I always used S-parameter test is that...
Dear Bert, I am not actually sure how you interpret a 6 dB change in impedance near the open condition as the impedance becomes infinite there. Perhaps another...
Hello hello When I run the program verify of multical (using HT BAsic 9.5. this message " ERROR 18 in 2850 string overflow or sub-string error" appears on...
Dear MM, It looks to me like you have used file names for the error boxes that are too long for the program. Please try renaming your error-box file names and...
When doing LRM calibration with Picopobe 150um + CS5 calikit on PNA (50 Ohm system impedance), according to the manual of CS5, it define the Cal Z0 as Line Z0....
When using the PNAnetgrabber software is it possible to choose between two different PNA's on the network? If so how is this done? If not do you have any...
Dear Benton, You can select the PNA you wish to read from by changing the name (an alias for the IP address of the PNA) in the PNANetGrabber software. This...
Hello, I am accustomed to creating microstrip-TRL calibration kits on III-V materials such as GaAs. For exaple, for a given GaAs process, the 50- ohm line...
Dear Nick, We have had very good luck with TRL measurements on silicon in our lab with similar dimensions. The difficulties we have encountered are not getting...
Dear Dr. Williams and all, I am very new to this NIST multical software. Upto now i am using Wincal products. I have to make multiline TRL calibration. I came...
Dear Vamsi, You might try holding shift and pressing the same key in MultiCal. There is a MultiCal manual on the website on the software page. Also, ...
Hi all, I was wondering if you have any resources or book (just give the name) regarding the calibration method(specially TRL). I'm new in the area of...
Dear Nima, You have a number of places to look. The book by Glenn Engen comes to mind as a good overall reference. To find out more about the foundations of...
Hallo I have a little problem with using Multical I am trying to make a cal kit in stripline (0.5 - 10 GHz,epsilon_r = 7). So I simulated a short, open, thru...
Dear Thomas, There are multiple solutions to the TRL problem, and it is possible that you got the wrong solution. But this should not happen if you put in a...
Hi, I want to fabricate a calibration kit (for TRL calibration method) on silicon substrate and the frequency range is 5 MHz - 20 GHz. I will appreciate it if...
Dear Nima, I don't believe that I have seen a specific set of design rules for a calibration set on silicon. However, I think that the standard tools like...
Dear Dylan, Thank you for your reply. I searched for this standard tool, FINDLEN, but I couldn't find any source. could you please send me some links to a...
Dear Nima, I am sorry, I should have been more specific. FINDLEN is part of the MultiCal Software package. You can find that in my website. Dylan ... Dylan...
Dear Dylan, I looked over the manual of MultiCal but couldn't find anything about FINDLEN standards. As I read one of your papers ("Comparison of SOLR and TRL...
Dear Nima, FINDLEN is not a set of standards, but a program that is included when you download MultiCal. We used FINDLEN to help us design the lengths of the...
1. What is the command to input the low frequency in Findlen.? 2.Can these line standards be used to calibrate VNA using Wincal ? 3. What should be the length...
Dear Dr. Dylan, Thanks for your answers, I have some few left 1. I could able to change in the program code so that i can change the default Low-frequency...
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