| 摘要 |
PURPOSE: Multi-frequency dielectric resonator oscillator is provided to obtain several frequencies from dielectric resonator oscillators is to use several oscillators and to switch their outputs without increasing a device size. CONSTITUTION: A screened cavity CAV surrounds the resonator DR in order to insulate it from external electromagnetic interference. The cavity CAV consists, for example, of a metal cover connected to earth. A substrate(10) closes the screened cavity CAV. The substrate(10) comprises, on the face located inside the cavity CAV, the conductor CL, for example made using a microstrip line. On the face of the substrate(10) located outside the cavity, an earth plane provides electromagnetic sealing. Orifices(15) placed on either side of the cavity CAV allow the conductor CL to pass through. The substrate(10) is extended beyond the cavity and supports the rest of the oscillator circuit. A second substrate(20) is held, for example by adhesive bonding, inside the cavity CAV. The resonator DR is adhesively bonded onto one face of the second substrate(20). The resonator DR is positioned on the second substrate(20) and the second substrate(20) is positioned in the cavity CAV in order to ensure coupling between the resonator DR and the conductor CL according to a known technique.
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