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About mahan.r@altair.com

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  1. Hi, FEKO uses one dimensional mesh (segment) to solve wires. So it splits a wire to multiple segments and calculates the current distribution over each segment. segment length can be controlled by setting the mesh size and the segment radius can be controlled by setting the wire radius. As MoM formulation for wires only considers axial current (no variation in circumferential direction), the radius should be much smaller than the wavelength, for this assumption to be valid (smaller than 0.1 lambda). One may intuitively expect that having smaller wire segment will improve the accuracy. This is correct to some extent, however the other factor that may affect the result is the ratio of wire radius to segment length. Numerical experiments have shown that good accuracy will be obtained for wire radius/segment length less than 0.1. for large ratios, current near open wire ends will present oscillatory behavior which may result in large errors
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