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Cavity Resonator or Resonant Cavities

A resonant cavity is any space completely enclosed by conducting walls that can contain oscillating electromagnetic fields and possess resonant properties.

Circular Cavity Resonator

As a rectangular cavity resonator is constructed by shorting both ends of a rectangular waveguide, a circular cavity resonator can also be formed in a similar way by shorting both the ends of a circular waveguide as shown in Fig. This circular resonator is also used in microwave signal propagation. The tuning of the resonant frequency is done by the movable top wall.

Circular cavity resonator

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