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Apertures on ground planes

Posted 16 nov. 2022, 04:56 UTC−5 3 Replies

Ravel Carlos De Miranda Pimenta
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Dear researchers,

I am trying to simulate two apertures on ground plane to verify the power transfer efficiency between them. I would like to know if anyone has some idea on how to design aperture on infinite ground planes... I thought on just using the image principle and do not use the planes at al... anyone has any idea on that? Thanks

3 Replies Last Post 29 nov. 2022, 09:38 UTC−5
Robert Koslover Certified Consultant
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Posted: 2 years ago 21 nov. 2022, 10:12 UTC−5

Are you talking about RF (i.e., antenna) apertures? There are many textbooks available that discuss antenna apertures, arrays of apertures, coupling between apertures, etc. Here's a link to an aperture chapter in a free on-line text: http://eceweb1.rutgers.edu/~orfanidi/ewa/ch18.pdf And here is a link to a paper (also free to download) about mutual coupling between rectangular apertures in an array in a plane: https://apps.dtic.mil/sti/pdfs/ADA056858.pdf

-------------------
Scientific Applications & Research Associates (SARA) Inc.
www.comsol.com/partners-consultants/certified-consultants/sara
Are you talking about RF (i.e., antenna) apertures? There are many textbooks available that discuss antenna apertures, arrays of apertures, coupling between apertures, etc. Here's a link to an aperture chapter in a free on-line text: http://eceweb1.rutgers.edu/~orfanidi/ewa/ch18.pdf And here is a link to a paper (also free to download) about mutual coupling between rectangular apertures in an array in a plane: https://apps.dtic.mil/sti/pdfs/ADA056858.pdf
Ravel Carlos De Miranda Pimenta
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Posted: 2 years ago 23 nov. 2022, 02:38 UTC−5

Are you talking about RF (i.e., antenna) apertures? There are many textbooks available that discuss antenna apertures, arrays of apertures, coupling between apertures, etc. Here's a link to an aperture chapter in a free on-line text: http://eceweb1.rutgers.edu/~orfanidi/ewa/ch18.pdf And here is a link to a paper (also free to download) about mutual coupling between rectangular apertures in an array in a plane: https://apps.dtic.mil/sti/pdfs/ADA056858.pdf

Dear Mr. Koslover Yes. RF apertures. I am going to check the material you sent me. Thank you so much. I am trying to use comsol to simulate two coupled apertures to validate my Matlab code, following the approach developed by F. Alsolamy, W. A. Alomar and A. Grbic, "Cylindrical Vector Beams for Wireless Power Transfer," in IEEE Transactions on Antennas and Propagation, vol. 69, no. 3, pp. 1716-1727, March 2021, doi: 10.1109/TAP.2020.3026428. The problem is I am having problems to model two ground plane apertures. I first replaced the apertures by surface magnetic current densities, using this kind of boundary on COMSOL (I am using the 2d axisymmetric model). But I am getting bizzarre values for the power efficiency between them. I am using a TM polarization, so the magnetic currents have only phi component. I place one current at z =0 and the other at z = L. I check the power using boundary probes (integrating the poyinting vector).

>Are you talking about RF (i.e., antenna) apertures? There are many textbooks available that discuss antenna apertures, arrays of apertures, coupling between apertures, etc. Here's a link to an aperture chapter in a free on-line text: http://eceweb1.rutgers.edu/~orfanidi/ewa/ch18.pdf >And here is a link to a paper (also free to download) about mutual coupling between rectangular apertures in an array in a plane: >https://apps.dtic.mil/sti/pdfs/ADA056858.pdf Dear Mr. Koslover Yes. RF apertures. I am going to check the material you sent me. Thank you so much. I am trying to use comsol to simulate two coupled apertures to validate my Matlab code, following the approach developed by F. Alsolamy, W. A. Alomar and A. Grbic, "Cylindrical Vector Beams for Wireless Power Transfer," in IEEE Transactions on Antennas and Propagation, vol. 69, no. 3, pp. 1716-1727, March 2021, doi: 10.1109/TAP.2020.3026428. The problem is I am having problems to model two ground plane apertures. I first replaced the apertures by surface magnetic current densities, using this kind of boundary on COMSOL (I am using the 2d axisymmetric model). But I am getting bizzarre values for the power efficiency between them. I am using a TM polarization, so the magnetic currents have only phi component. I place one current at z =0 and the other at z = L. I check the power using boundary probes (integrating the poyinting vector).
Robert Koslover Certified Consultant
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Posted: 2 years ago 29 nov. 2022, 09:38 UTC−5

I suggest you post your .mph file to the forum.

-------------------
Scientific Applications & Research Associates (SARA) Inc.
www.comsol.com/partners-consultants/certified-consultants/sara
I suggest you post your .mph file to the forum.

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