Tunable Evanescent Mode Cavity Filter using a Piezoelectric Device

Model ID: 12619

An evanescent mode cavity filter can be realized by adding a structure inside of the cavity. This structure changes the resonant frequency lower than the dominant mode of the unfilled cavity. A piezo actuator is used to control the size of a small air gap which provides the tunability of the resonant frequency.

This model was built using the following:

RF Module