| 摘要 |
PURPOSE:To reduce the adjustment man-hour of a coupling part by providing a branching filter coupling a dielectric resonator element of other circuit and other dielectric block to each dielectric resonator of a part in a dielectric resonator section via a coupler respectively. CONSTITUTION:An input signal of a frequency f1 from a terminal 1 is outputted from a terminal 2 via a capacitor 312, dielectric elements 21, 32 and a coupling circuit 5. On the other hand, a signal of a frequency f2 inputted to the circuit 5 from the terminal 2 is outputted externally via a dielectric resonance element 4, capacitors 421, 422, dielectric resonance elements 6, 7 and a capacitor 72. The resonance frequencies f1, f2 of the elements 33, 4 differ, then distances theta1, theta2 not giving effect are obtained at the design, and the distances depend on the distances D1, D2 between the elements 33, 4 and the coupler 5, the diameter of the device 5, and the length of the metallic rod 51 inserted in the device 5 or the like. Then the part is manufactured incorporatedly, then the distance obtained in advance is almost satisfied and the adjustment man-hour is reduced by the adjustment of the coupling degree by the metallic rod 51.
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