| 摘要 |
PROBLEM TO BE SOLVED: To match impedance with an optimum value in different frequency bands. SOLUTION: A 1st reactance circuit 10a with reactance X1 and a 2nd reactance circuit 20a with reactance X2 are provided. The 1st reactance circuit 10a consists of a parallel resonance circuit, consisting of a coil 12 and a capacitor 13 and a coil 11 connected in series with it. The 2nd reactance circuit 20a consists of a parallel resonance circuit, consisting of a coil 22 and a capacitor 23 and a coil 21 connected in series with it. The reactance circuits 10a and 20a have frequency characteristics which impart specific reactance values at 2 or more differing frequencies.
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