Cavity resonator or coaxial resonator

摘要

For rapid frequency changes, which can also be remotely controlled, it is also necessary to change the resonant frequency of resonators located in the circuit. It is intended to specify means which allow a changeover to be effected without any quality loss even when the two frequencies differ by an order of magnitude of 10%. A changeover in the resonant frequency of a cavity resonator is made possible by a piston being suddenly moved into the resonator or removed from it. The insertion depth @ of the piston into the resonator is variable for tuning. A second tuning element is used for tuning the second frequency. Filters; directional radio apparatuses (radio link apparatuses).