What is a cavity filter?

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Revision as of 02:11, 11 September 2008 by TimVK4YEH (talk | contribs) (added some info - more to follow)
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Cavity filters are the basic circuitry behind a Duplexer and are sharply tuned resonant circuit that allow only certain frequencies to pass. Generically, filter os this kind are known as notch filter.

Physically a cavity filter is a resonator inside a conducting "box" with coupling loops at the input and output, as follows:

VK4YEH Cavity 1.jpg

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