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Difficulty in using iterative method for Rf problems which has multiple ports condition one boundary

Posted 15.10.2012, 13:35 GMT-4 Version 4.3 0 Replies

Aimi Abass
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Hi everybody,

have anybody encountered the problem of keep on having ill conditioned preconditioner when you apply a lot of port condition on a single boundary (For grating structure simulations where many diffraction order expected)? Although it works fine with direct methods, the iterative method with multigrid keeps on not converging. I tried using iterative method on the example comsol model of plasmonic wire grating but i encountered the same problem. Anybody can give an advice how to tackle such problems with multiple ports on one boundary with iterative methods?

Best regards,


Aimi
0 Replies Last Post 15.10.2012, 13:35 GMT-4
COMSOL Moderator

Hello Aimi Abass

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