PURPOSE: To simplify and miniaturize constitution and to facilitate manufacturing by forming a coupling part in common for four waves by a partition conductor plate and a common coupling conductor in common for the four waves with different frequencies,
CONSTITUTION: A high frequency current flows on a closed circuit consisting of the common coupling conductor 4, the partition conductor plate 2, a resonator main body 1, a supporting conductor 5, the external conductor of a common coaxial terminal 3, the inner conductor of the coaxial terminal 3, and the coupling conductor 4 by the component EC of an electrostatic vector EH i.e., a magnetic field generated in a direction different from the electrostatic vector by 90° in parallel with the axial direction of the common coupling conductor 4, and the wave f1 is outputted from the coaxial terminal 3. The wave f2 and the waves f3 and f4 inputted via coupling loops 8 and 9 are also outputted from the coaxial terminal 3, which are operated as a cavity resonator in common for the four waves. The magnitude of output from the coaxial terminal 3 can be adjusted by varying the strength of a coupling magnetic field generated in a direction perpendicular to the electric field Ec by varying each insertion length of coupling adjusting elements 141, 142, and 151, 152.
HATANAKA HIROSHI
OKAMURA YUJI
NIPPON TELEGRAPH & TELEPHONE