Resonant Frequencies in Rectangular Waveguide Cavity

Determining a resonant frequency of a cavity is a frequent task in analyzing various microwave systems. Due to the shape and interior structure of the cavity, it is often not possible to perform resonant frequency calculations by applying analytical formulas. In such cases, direct calculations are replaced by numerical EM simulation
WIPL-D Pro CAD can be used as an accurate and easy to use software tool. Resonant frequencies are calculated with very high precision. This is verified by comparing WIPL-D results with EM theory.

The simulations are carried out at regular desktop PC in negligible time. The powerful built-in interpolation algorithm allows obtaining high precision frequency domain results with very low number of frequency points.

The comparison of the results suggests that exciting the cavity with a dipole and a generator is highly effective. All resonant frequencies can be identified and coincide with the values obtained using analytical formulas.

Section: EMC

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