| 摘要 |
PROBLEM TO BE SOLVED: To provide a high-frequency switching circuit capable of having wider band isolation and realizing improvement in non-defective rate by absorbing production dispersion, and a communication apparatus in which the high-frequency switching circuit is integrated. SOLUTION: The high-frequency switching circuit has a configuration with a first series resonance circuit 6 inserted by a first capacity element C1, which resonates in series with a first resonance frequency f1 with respect to a first inductance component L1 existing between a second switch element 5 and a ground E, and one or two more second series resonant circuits 8, which resonate in series with a second resonance frequency f2 with respect a second inductance component L2, are connected in parallel between the second switch element 5 and the ground E. The second resonance frequency f2 is different from the first resonance frequency f1. COPYRIGHT: (C)2004,JPO
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