Antenna calculation Frequency combination

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I would like to consult regarding a technical issue concerning dual-band antenna simulation using COMSOL's RF Module. Currently, I'm modeling an antenna that needs to operate simultaneously across two frequency bands: 0.6-1.0GHz and 1.6-2.0GHz, with the goal of obtaining composite simulation results.

Specifically, I need to:

Apply a single excitation source that simultaneously covers both frequency bands

Analyze the antenna's radiation characteristics under this dual-band operation

Acquire the superimposed field distribution results

Could you please advise on the proper configuration for implementing this multi-frequency analysis in COMSOL? Your guidance on the setup methodology would be greatly appreciated.

Thank you very much for your assistance!


1 Reply Last Post 22 apr 2025, 10:14 GMT-4
Robert Koslover Certified Consultant

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Posted: 8 hours ago 22 apr 2025, 10:14 GMT-4
  1. Is your problem linear? Most antenna problems are. If so, compute the results at each independent frequency separately. If you truly need to see the details of the combined waveforms, then add the two solutions in post-processing.
  2. If your problem is non-linear, then prepare and perform the computations in the time domain.
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Scientific Applications & Research Associates (SARA) Inc.
www.comsol.com/partners-consultants/certified-consultants/sara
1. Is your problem *linear*? Most antenna problems are. If so, compute the results at each independent frequency separately. If you truly need to see the details of the combined waveforms, then add the two solutions in post-processing. 2. If your problem is *non-linear*, then prepare and perform the computations in the time domain.

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