Exciting dual antenna with two different frequencies simultaneously

Please login with a confirmed email address before reporting spam

I am attempting to simulate the structure using COMSOL. Specifically, I am trying to excite a two-antenna array, each with four point sources, simultaneously at two different frequencies. However, I am having difficulty figuring out how to achieve this in COMSOL, as the tool is relatively new to me. I also tried combining the results of frequencies F1 and F2 in post-processing, but the outcomes seem incorrect.

Could you kindly guide me on how to approach this in COMSOL?

P.S: I mean antenna 1 with F1, and antenna 2 with F2 simultaneously.



1 Reply Last Post 2024年12月3日 GMT-5 19:29
Robert Koslover Certified Consultant

Please login with a confirmed email address before reporting spam

Posted: 19 hours ago 2024年12月3日 GMT-5 19:29
Updated: 18 hours ago 2024年12月3日 GMT-5 19:36

If your physics is entirely linear (and I suspect it is), then you can combine the two separately computed results just as you described, working in the frequency domain. If there are any non-linear effects of significance, then you need to do this in time domain. (Note: I am assuming you are presently attempting to do this in the frequency domain.) Now, assuming linearity holds, if the outcomes in your model "seem incorrect" to you, then: (1) there may be one or more errors somewhere in the setup of the problem, involving one or both of the two frequencies, and/or in how you endeavored to combine the results, either in post-processing or elsewhere; or (2) another possibility is that the result that concerns you may actually be correct, but is also different from what you expected. To get this resolved, I suggest you post your .mph file to the forum so that other Comsol users reading this can take a look at it and offer you suggestions specific to your model and physics.

-------------------
Scientific Applications & Research Associates (SARA) Inc.
www.comsol.com/partners-consultants/certified-consultants/sara
If your physics is entirely linear (and I *suspect* it is), then you can combine the two separately computed results just as you described, working in the frequency domain. If there are any non-linear effects of significance, then you need to do this in time domain. (Note: I am *assuming* you are presently attempting to do this in the frequency domain.) Now, assuming linearity holds, if the outcomes in your model "seem incorrect" to you, then: (1) there may be one or more errors somewhere in the setup of the problem, involving one or both of the two frequencies, and/or in how you endeavored to combine the results, either in post-processing or elsewhere; or (2) another possibility is that the result that concerns you may actually be correct, but is also different from what you expected. To get this resolved, I suggest you post your .mph file to the forum so that other Comsol users reading this can take a look at it and offer you suggestions specific to your model and physics.

Reply

Please read the discussion forum rules before posting.

Please log in to post a reply.

Note that while COMSOL employees may participate in the discussion forum, COMSOL® software users who are on-subscription should submit their questions via the Support Center for a more comprehensive response from the Technical Support team.