Hi Jimbo,
of course COMSOL calculates the stray field (you call it fringing field). The difference between an analytical calculation and COMSOL is that COMSOL cannot calculate the stray field at large distances because the FE model must be finite.
In the AC/DC approximation the field topology does not depend on frequency, also the stray fields are frequency independent.
It is the nature of the quasistatic approximation that the relation of structural dimensions and wavelength are ignored.
You must probably use RF to see those effects you are expecting.
Cheers
Edgar
of course COMSOL calculates the stray field (you call it fringing field). The difference between an analytical calculation and COMSOL is that COMSOL cannot calculate the stray field at large distances because the FE model must be finite.
In the AC/DC approximation the field topology does not depend on frequency, also the stray fields are frequency independent.
It is the nature of the quasistatic approximation that the relation of structural dimensions and wavelength are ignored.
You must probably use RF to see those effects you are expecting.
Cheers
Edgar
