Updated June 18, 2006

New for July 2006! We don't have much to offer on this topic yet. If you have any info please send it in and we'll post it.

A resonant cavity forms a means of storing electromagnetic energy, at a particular frequency within a small bandwidth. A resonant cavity must be constructed of a good conductor, and the shape of the cavity is related to the frequency that it can resonate at.

Resonant cavities can be categorized into two types: wanted and unwanted! In the unwanted case, microwave modules that are improperly designed end up having spurious responses. Microwave tubes and waveguide filters are examples of resonant cavity by design. So is a wavemeter!

While we're waiting for further inputs on this subject, here's a MATLAB (c) file that was contributed by our friend Itzik. It calculates the resonances of a cylindrical cavity.

Click here to go to our download area to find it.