How to construct rectangular port in 2D axis-symmetric model (Electromagnetic study)

tomchiah · December 7, 2023, 13:17

Hi all,

I would like to ask how to define a rectangular port in 2D axis-symmetric model for electromagnetic wave study. It seems like the only available option is: numeric, coaxial, and circular.

I tried to self define it. Since I want to study TE10 mode, there is only electric field at x-direction, but how do i define this case in cylindrical coordinates for COMSOL?

Screenshot 2023-12-08 021534.jpg

aminem · January 13, 2024, 00:46

You can't do it in 2D axy-symmetric. You should have a 2D model.

tomchiah · January 13, 2024, 13:32

Hi, yes. I just found out that for rectangular port it is impossible for 2D-axis, unless it is something like circular port. For this case, it should be 2D or even 3D.

December 7, 2023, 13:17	How to construct rectangular port in 2D axis-symmetric model (Electromagnetic study)	#1
tomchiah Member Chiah Zi Jing Join Date: Oct 2023 Location: Xiamen University Malaysia (XMUM) Sepang, Malaysia Posts: 38 Rep Power: 2	Hi all, I would like to ask how to define a rectangular port in 2D axis-symmetric model for electromagnetic wave study. It seems like the only available option is: numeric, coaxial, and circular. I tried to self define it. Since I want to study TE10 mode, there is only electric field at x-direction, but how do i define this case in cylindrical coordinates for COMSOL? Screenshot 2023-12-08 021534.jpg

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January 13, 2024, 00:46		#2
aminem Member amine Join Date: Jan 2014 Location: FRANCE Posts: 84 Rep Power: 12	You can't do it in 2D axy-symmetric. You should have a 2D model.

January 13, 2024, 13:32		#3
tomchiah Member Chiah Zi Jing Join Date: Oct 2023 Location: Xiamen University Malaysia (XMUM) Sepang, Malaysia Posts: 38 Rep Power: 2	Hi, yes. I just found out that for rectangular port it is impossible for 2D-axis, unless it is something like circular port. For this case, it should be 2D or even 3D.