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Failed to evaluate variable Jacobian
Posted Dec 5, 2011, 5:58 p.m. EST RF & Microwave Engineering, Materials, Studies & Solvers Version 4.2 1 Reply
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hi,
I tried to find the modes of a ridge waveguide, but comsol said he failed to evaluate variable Jacobian.
I think the problem is that i have a function that changes the refractive index of one of the layers.
How can I solve the problem?
I tried to find the modes of a ridge waveguide, but comsol said he failed to evaluate variable Jacobian.
I think the problem is that i have a function that changes the refractive index of one of the layers.
How can I solve the problem?
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1 Reply Last Post Dec 6, 2011, 2:55 p.m. EST
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Posted:
1 decade ago
I see 2 problems in your model:
1. Delete argument of your function, "[m]".
2. To refer to your function, you need to use proper argument. For example, "index(13.5e-9)"
If you make these two changes the error will disappear.
P.S.: your meshing is really bad. Start meshing the structure from the thinnest layer.
1. Delete argument of your function, "[m]".
2. To refer to your function, you need to use proper argument. For example, "index(13.5e-9)"
If you make these two changes the error will disappear.
P.S.: your meshing is really bad. Start meshing the structure from the thinnest layer.