Voltage controlled oscillator including a dielectric resonator p

Details Voltage controlled oscillator including a dielectric resonator p Voltage controlled oscillator including a dielectric resonator p

1993-01-27

1994-12-13

Mis, David

Oscillators

With distributed parameter resonator

331 67, 331177V, 3332191, H03B 518, H01P 710

Patent

active

053732626

ABSTRACT:
In a voltage controlled oscillator, a dielectric resonator is mounted on a circuit board and a metal case is mounted on the circuit board to shield the dielectric resonator. The dielectric resonator comprises a C-shaped first electrode which is provided in a dielectric body, second and third electrodes which are arranged on upper and lower sides of the first electrode, a signal connecting pattern which is extended from the first electrode toward a side surface of the dielectric body, and earth connecting patterns which are extended from the first, second and third electrodes toward the side surface of the dielectric body, to provide predetermined impedance between the earth connecting pattern and the signal connecting pattern. The dielectric resonator is arranged with the second and third electrodes in parallel with a major surface of the circuit board, and the second electrode is upwardly exposed. A portion of the second electrode portion at a predetermined position is adapted to be trimmed so as to regulate the resonance frequency of the dielectric resonator, so as to regulate the oscillator frequency of the voltage controlled oscillator. The dielectric resonator can be miniaturized with no reduction of its Q-value.

REFERENCES:
patent: 4574255 (1986-03-01), Fujii et al.
patent: 4758922 (1988-07-01), Ishigaki et al.
patent: 5105176 (1992-04-01), Okamura et al.
patent: 5227739 (1993-07-01), Manda et al.
patent: 5300903 (1994-04-01), Okamura et al.

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