High-frequency power amplifier device

Details High-frequency power amplifier device High-frequency power amplifier device

2007-03-28

2009-06-02

Choe, Henry K (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including frequency-responsive means in the signal...

C330S296000

Reexamination Certificate

active

07541874

ABSTRACT:
A high-frequency power amplifier device including: a power amplifier circuit which amplifies a high-frequency signal; an output matching circuit connected to an output side of the power amplifier circuit; and a high-frequency circuit connected to an output side of the output matching circuit, which is designed so that X[f] satisfies the relationship expressed as X[L]<X[H], where j denotes an imaginary number, f denotes a frequency, an impedance of the high-frequency circuit viewed from the output matching circuit is defined as Z[f]=R[f]+jX[f], L denotes a lower limit of the frequency, and H denotes an upper limit of the frequency.

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