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Dear all,

It may be of interest that the systematic uncertainties in antenna impedance and antenna -magnitude and phase- pattern measurements have been computed and illustrated, since the corresponding problem of S-parameter systematic uncertainties in the two dominant measurement techniques of full one- and two-port VNA measurements, has been solved analytically and the results have now been published in the Open Access, peer-reviewed, primary literature:

1
N. Yannopoulou, P. Zimourtopoulos, "S-Parameter Uncertainties in Network Analyzer Measurements with Application to Antenna Patterns", Radioengineering, April 2008, Volume 17, Number 1, pp 1-8:
www.urel.feec.vutbr.cz/RADIOENG/number. ... &year=2008

2
N. Yannopoulou, P. Zimourtopoulos, "Total Differential Errors in One-Port Network Analyzer Measurements with Application to Antenna Impedance", Radioengineering, June 2007, Volume 16, Number 2, pp 1-8:
www.urel.feec.vutbr.cz/RADIOENG/number. ... &year=2007

Kind regards,

Petros Zimourtopoulos
Antennas Research Group RGA at DUTh
www.antennas.gr

Advertisement of what?
But you have to know better, of course.
No hard feelings!

I wouldn't consider links to scientific articles, concerning network analysis, advertisement. This particular one might have been better placed under the Calibration discussion group rather than here under applications, but it is usefull none-the-less.

Thank you. The message was firstly appeared under the Calibration/Error Correction (network analyzers) discussion group indeed, but it was then deleted by the moderator(s).

jvall wrote:However, please do post in more than one area.

He means "please do NOT post in more than one area..I think.

Dear all,

It may be of interest that a number of computer animations supporting the ppt presentation:
"Building Complex Differential Error Regions", by N. Yannopoulou and P. Zimourtopoulos
-online, in the 30th ANAMET meeting, held at NPL on 24th October 2008-
as well as all of the related material, are now available at the web address:

http://www.antennas.gr/anamet/30/

Kind regards,

Petros Zimourtopoulos
Antennas Research Group, Xanthi, Thrace, Hellas

Dear all,

In order to demonstrate the usefulness of the only one existing method
for systematic error estimations in VNA measurements by using complex DERs,
we compare one-port VNA measurements after the two well-known calibration techniques:

- the quick reflection response, that uses only a single S (Short circuit) standard, and

- the time-consuming full one-port, that uses a triple of SLO standards (Short circuit, matching Load, Open circuit):

"Comparison of Error Estimations by DERs in One-Port S and SLO Calibrated VNA Measurements and Application",
by Nikolitsa Yannopoulou, Petros Zimourtopoulos

http://arxiv.org/abs/1102.4239

Best regards,

Petros Zimourtopoulos
Antennas Research Group, Palaia Morsini, Xanthi, Thrace, Hellas, EU