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Apply current to a perfect electric conductor

Posted Dec 20, 2017, 3:14 p.m. EST Electromagnetics, Low-Frequency Electromagnetics, RF & Microwave Engineering 3 Replies

Kerry Yang
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Hello,

I wanted to see if there was a way to apply current to a perfect electric conductor I have defined in the RF module? I am trying to apply current to a design and then send frequency and see it's respective transmission and reflection. However, I am not sure how to simply apply current to the conductor as it is in the RF module.

Thanks in advance,

-KY

3 Replies Last Post Apr 30, 2018, 6:10 p.m. EDT
Robert Koslover Certified Consultant
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Posted: 6 years ago Dec 22, 2017, 11:37 p.m. EST
Updated: 6 years ago Dec 22, 2017, 11:38 p.m. EST

Yes, you can apply surface currents to a perfect conductor in the RF module. Normally, one applies port boundary conditions (there are several types available) when setting up current-driving (or wave-launching) configurations, especially when one is interested in computing reflected and transmitted waves. I encourage you to take a look at some of the examples provided with the applications library for the RF module to learn how this is done and to learn more about the boundary-condition setting tools, and post-processing tools, which are provided to make it easier for you to both set up your problems and analyze the results.

-------------------
Scientific Applications & Research Associates (SARA) Inc.
www.comsol.com/partners-consultants/certified-consultants/sara
Yes, you can apply **surface** currents to a perfect conductor in the RF module. Normally, one applies port boundary conditions (there are several types available) when setting up current-driving (or wave-launching) configurations, especially when one is interested in computing reflected and transmitted waves. I encourage you to take a look at some of the examples provided with the applications library for the RF module to learn how this is done and to learn more about the boundary-condition setting tools, and post-processing tools, which are provided to make it easier for you to both set up your problems and analyze the results.
Kerry Yang
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Posted: 6 years ago Dec 26, 2017, 10:46 p.m. EST
Updated: 6 years ago Dec 26, 2017, 10:54 p.m. EST

Robert,

Thank you for your response. I wanted to see if you had an example in mind that would work? I couldn't find any that had a great example. Moreover, I wanted to see if i could apply any Amperage to a conductor in the RF module? I wasn't able to tell if i could actually have that type of control. In general, I was trying to send a wave from the top place(to the bottom) of the piece and have a piece that acted like a exposed wire that had 0-15 Amps applied through it(right plane to left plane of the piece) so i can graph the response of 0-15 amps with the transmission and reflection. I thought I had to use the AC/DC module to to get this type of control and get accurate current on the conductor/exposed wire, but I couldn't figure out how to do that either as I am very new to comsol.

Thanks,

-KY

Robert, Thank you for your response. I wanted to see if you had an example in mind that would work? I couldn't find any that had a great example. Moreover, I wanted to see if i could apply any Amperage to a conductor in the RF module? I wasn't able to tell if i could actually have that type of control. In general, I was trying to send a wave from the top place(to the bottom) of the piece and have a piece that acted like a exposed wire that had 0-15 Amps applied through it(right plane to left plane of the piece) so i can graph the response of 0-15 amps with the transmission and reflection. I thought I had to use the AC/DC module to to get this type of control and get accurate current on the conductor/exposed wire, but I couldn't figure out how to do that either as I am very new to comsol. Thanks, -KY
Dane Hardin
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Posted: 6 years ago Apr 30, 2018, 6:10 p.m. EDT
Updated: 6 years ago Apr 30, 2018, 6:12 p.m. EDT

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