| 摘要 |
PROBLEM TO BE SOLVED: To provide a super-high power efficiency amplifier circuit for sharply improving load power efficiency without generating any residual reactance components due to parallel stub. SOLUTION: This higher harmonic processing circuit is constituted of a transmission line T11 whose input terminal is connected with an output terminal C of a transistor Q1 for amplification with length which isλ/4 (wavelength is defined asλ) of a basic wave f0, a first transmission line group T2-T7 constituted of n pieces of transmission lines connected in parallel at an output terminal A of the transmission line T11 whose transmission line length L is expressed with a relation of L=λ/4(1+m) (m=1, 2, 3,..., n) and whose top ends are open, and a second transmission line group T2'-T7' constituted of n pieces of transmission lines connected in parallel at the output terminal A whose transmission line Lh is expressed with a relation of Lh+L=λ/2 and whose top ends are open. Thus, the admittance of each stub to the basic wave can be turned into zero so that load power efficiency can be sharply improved.
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