Cavity Resonance Frequency Calculator
Calculate the resonant frequency of an idealized rectangular conducting cavity filled with a homogeneous medium assumed to be lossless.
Result will appear here
Formula: fmnp = c / (2√(εr μr)) × √((m/a)² + (n/b)² + (p/h)²)
The formula assumes a perfectly conducting rectangular cavity and a homogeneous, lossless medium.
The model shows how dimensions, mode indices, relative permittivity and relative permeability affect resonance. It does not account for real losses, wall materials or coupling.
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Last updated on September 24, 2026
Author: IBL-Editors Team
Technical Review: Andreas Bender - Deputy Managing Director | IBL-Lab GmbH Give feedback on this article
Author: IBL-Editors Team
Technical Review: Andreas Bender - Deputy Managing Director | IBL-Lab GmbH Give feedback on this article