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vemsa3d 1.1 - a floss visual em simulator for 3d antennas
| From......: "Bill Miller"
| Newsgroups: sci.physics.electromag | Sent......: Wednesday, August 18, 2010 10:44 PM | Subject...: vemsa3d 1.1 - a floss visual em simulator for 3d antennas | | wrote in message ... | - | ... | | How does this work differ from NEC Numeric Electromagnetic Code for antenna | analysis? | | Bill Miller - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Dear Mr. Miller, VEMSA3D can not work differently, because it is based on the same theoretical method as NEC does, that is on the Method of Moments. However, since each of these numerical applications use a different basis of the current function space and since their corresponding computer programs use unavoidably finite linear combinations of them, in general, they produce different results. To be specific, the two bases details are included in the following: VEMSA3D current basis: J. H. Rischmond, Radiation and Scattering by Thin-Wire Structues in the Complex Freqeuncy Domain, (15), p.6 http://tinyurl.com/24zwycy NEC current basis: G. J. Burke, A. G. Poggio Numerical Electromagnetics Code - Method of Moments Equation (20), p. 11 http://www.si-list.net/NEC_Archives/nec2prt1.pdf Regards, Petros Zimourtopoulos |
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