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Rotation of an anisotropic material - RF waveguide
Posted Jun 4, 2014, 4:14 p.m. EDT RF & Microwave Engineering 1 Reply
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I've constructed a partially filled wave guide with an anisotropic material, cube shaped, centered within the waveguide.
Is it possible to set up comsol so as when I rotate the cube within the geometry tab, the matrix defining the respective permitivies will change according to my object's orientation? Or do I need to manually go into "Wave Equation ~ Relative Permitivity ~ Change diagonal matrix values" to represent the rotation of the cube?
Thank you.
Is it possible to set up comsol so as when I rotate the cube within the geometry tab, the matrix defining the respective permitivies will change according to my object's orientation? Or do I need to manually go into "Wave Equation ~ Relative Permitivity ~ Change diagonal matrix values" to represent the rotation of the cube?
Thank you.
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1 Reply Last Post Jun 9, 2014, 11:36 a.m. EDT
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Posted:
1 decade ago
Two possibilities (at least):
1. You can set up a new alternative coordinate system for your cube. I expect that Comsol experts who read this will be happy to help you learn how to do that.
2. Whenever I have properties that I need to specify in terms of the "fixed" coordinates, but also need to re-orient, I normally just rotate *everything else* in the problem in the opposite direction. (This is basically a workaround, to avoid having to define and employ two coordinate systems in one problem.)
1. You can set up a new alternative coordinate system for your cube. I expect that Comsol experts who read this will be happy to help you learn how to do that.
2. Whenever I have properties that I need to specify in terms of the "fixed" coordinates, but also need to re-orient, I normally just rotate *everything else* in the problem in the opposite direction. (This is basically a workaround, to avoid having to define and employ two coordinate systems in one problem.)