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Resonant Frequencies of a Rectangular Enclosure



Length (L)

Width (W)

Height (H)

Relative permittivity: εr =


Resonances (Hz)


f110 =

f111 =

f211 =

f220 =

f101 =

f201 =

f210 =

f221 =

f011 =

f120 =

f021 =

f121 =

Instructions: Specify the length, width and thickness of the enclosure interior. To list the lowest frequency resonances, make the longest dimension the length and the shortest dimension the height. If the cavity is filled with a dielectric, you can specify the relative permittivity.

Rectangular enclosure with dimensions L, W and H
Rectangular Cavity Resonance Equations

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