| 摘要 |
PROBLEM TO BE SOLVED: To reduce phase noises by reducing the drop in Q. SOLUTION: A fan-shaped strip line conductor 4 is located at the central part inside a dielectric 2, with which ground conductors 1 and 3 are provided on the surface. The pivot of the fan of the conductor 4 is connected to an external power feeding terminal 13 as a power feeding point and the other terminal is opened. Around the side face of the triplate resonator, a ground conductor 5 is formed except for the power feeding point of the conductor 4. Since the fan-shaped strip line conductor 4 is adopted, the drop of Q of the resonator caused by a radiation loss caused by an electromagnetic field leaked in the upper surface of the conductor can be suppressed. Besides, since the conductor is fan-shaped, an area is enlarged, an equivalent capacitive component is increased by strengthening an electric field component formed between the conductor 4 and the ground conductors 1 and 2, a susceptance change rate as the imaginary part of an admittance component at a resonance frequency f0 is increased and a load QL is increased. Further, the leak of the electromagnetic field can be reduced by the ground conductor 5 and high Q can be provided.
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