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RF: Resolving Singularities; Simple Antenna Signal Mapping

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Greetings COMSOL Forum!

I have a simple antenna I'd like to model constructed from an SMA-fed wire connected inside a cylindrical steel can, positioned at the half-wavelength point off the can's base.

The geometry is defined in 3D.

What I'm having difficulty with is mapping the input signal to that SMA wire.

I've tried defining a simple sine function, and two ports: one for the SMA wire (input), and one for the can (output) -- where does the input connect in the Electromagnetics solver? And is the open edge of the can the correct port declaration for the antenna's propagation?

I've tried inputting a fixed frequency into the Maxwell Equation, as well as the function label (which appears orange).

In both cases, I get singularity errors in the mesh when I'm trying to get an electromagnetic field distribution.

Any insights on how to correct these complications?

Thanks,
DSE

0 Replies Last Post 12 ago 2011, 13:32 GMT-4
COMSOL Moderator

Hello Deran Eaton

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