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Loaded microwave cavities

A microwave cavity has a fundamental mode, which exhibits the lowest resonant frequency of all possible resonant modes. For example, the fundamental mode of a cylindrical cavity is the TM010 mode. For certain applications, there is motivation to reduce the dimensions of the cavity. This can be done by using a loaded cavity, where a capacitive or an inductive load are integrated in the cavity’s structure.

The precise resonant frequency of a loaded cavity must be calculated using finite element methods for Maxwell’s equations with boundary conditions.

Loaded cavities are particularly suited for accelerating low velocity charged particles. This application for many types of loaded cavities has been covered in review article. The most common types are listed below.


 * The reentrant cavity.
 * The helical resonator.
 * The spiral resonator.
 * The split-ring resonator.
 * The Quarter Wave Resonator.
 * The Half Wave resonator.

References