| 摘要 |
PROBLEM TO BE SOLVED: To provide a high-frequency coupler capable of increasing isolation for a plurality of frequencies. SOLUTION: First and second main lines ML1 and ML2 are each capacitively coupled to a sub-line SL, and a capacitor is connected to the sub-line SL. When each of the First and second main lines ML1 and ML2 is conducted with a high-frequency signal, one part of the signal is induced in the sub-line SL, high-frequency signals of the first and second main lines ML1 and ML2 can be monitored by the sub-line SL. The frequency characteristic of the high-frequency coupler is adjusted by a capacitor to be connected to the sub-line, and the isolation can be increased for both signals of two frequencies passing through the first and second main lines ML1 and ML2. COPYRIGHT: (C)2005,JPO&NCIPI
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