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Antenna Feed Structure Modeling Suggestions

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I'm trying to model a real antenna with a similar feed structure to that shown in the attached photo. Right now, I am modeling the feed as a perfect conducting wire between the two leads with a voltage source feed point at the middle of the wire. The antenna itself is modeled as a finite thickness region, that is, having four sides in three dimensions. Without explicitly modeling the feed wires of the real geometry, does anyone know of a more accurate way to model the feed? I am interested in evaluating the antenna's specific absorption rate (SAR). It is meant to be placed directly on the skin.

example_geometry.JPG

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