CST MWS Phase center calculation

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eirp

Joined: 11 Dec 2001
Posts: 639
Helped: 9
Location: Phase center

30 Jun 2004 10:58 phase centre calculation cst

Hi all EM fans!

Does anyone have experience with phase center calculations in MWS?
I did some tests with theoretical results on rectangular horn and found good agreement in one plane. In second plane the results were different.

Who knows what the "Sigma" stands for? I mean when displaying the result there is phase center location and the Sigma value too.

What are your observations?

Thanks a lot

eirp

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RFSimulator

Joined: 24 Jan 2004
Posts: 176
Helped: 15
Location: Europe

02 Jul 2004 15:59 phase center cst

Hi,

the sigma is some kind of error measurement. You can specify a certain solid angle on a sphere for which the phase centre is calculated. The Phase Centre is the point, were the phase difference between all that points has its minimum.
The sigma is a value for the phase difference on all the points.

Large Sigma means: the phase varies quite lot on the sphere section.

Small sigma: the phase is pretty much identical on all points of the sphere section.

F.