Title:
HIGH-FREQUENCY POWER AMPLIFIER MODULE
Document Type and Number:
WIPO Patent Application WO/2000/003478
Kind Code:
A1
Abstract:
A high-frequency power amplifier module for dual-band mobile radio communication equipment capable of transmitting and receiving first and second frequencies f1 and f2 (f2=2xf1). The output circuit of the module is constituted of a transmission line connected to the drain terminal of an output transistor, a parallel resonnace circuit which is connected in series with the transmission line and resonates with a higher harmonic with a frequency twice as high as the frequency f2, a series resonance circuit which is provided between one end of the parallel resonance circuit and the ground and resonates with a high harmonic with a frequency twice as high as the frequency f1, and an output matching circuit which is connected in series with the other end of the parallel resonance circuit and is matched to the frequencies f1 and f2. The transmission line is preset so that the line my be short-circuited to the drain terminal against even-order higher harmonics having the frequency f2 by a reactance existing at the drain terminal, and the circuit element constant constituting the parallel resonance circuit is preset so that the circuit may be opened at the drain terminal against odd-order higher harmonics having the frequency f1 by reactances existing at the series resonance circuit, transmission line, and drain terminal.
Inventors:
FUJIOKA TORU (JP)
YOSHIDA ISAO (JP)
KATSUEDA MINEO (JP)
MORIKAWA MASATOSHI (JP)
MATSUNAGA YOSHIKUNI (JP)
SEKINE KENJI (JP)
KAGAYA OSAMU (JP)
YOSHIDA ISAO (JP)
KATSUEDA MINEO (JP)
MORIKAWA MASATOSHI (JP)
MATSUNAGA YOSHIKUNI (JP)
SEKINE KENJI (JP)
KAGAYA OSAMU (JP)
Application Number:
PCT/JP1998/003069
Publication Date:
January 20, 2000
Filing Date:
July 08, 1998
Export Citation:
Assignee:
HITACHI LTD (JP)
FUJIOKA TORU (JP)
YOSHIDA ISAO (JP)
KATSUEDA MINEO (JP)
MORIKAWA MASATOSHI (JP)
MATSUNAGA YOSHIKUNI (JP)
SEKINE KENJI (JP)
KAGAYA OSAMU (JP)
FUJIOKA TORU (JP)
YOSHIDA ISAO (JP)
KATSUEDA MINEO (JP)
MORIKAWA MASATOSHI (JP)
MATSUNAGA YOSHIKUNI (JP)
SEKINE KENJI (JP)
KAGAYA OSAMU (JP)
International Classes:
H03F3/193; H03F3/21; H03F3/72; H04B1/00; H04B1/04; (IPC1-7): H03F3/189
Foreign References:
| JPH1056339A | 1998-02-24 |
Attorney, Agent or Firm:
Takahashi, Akio (Nihonbashi-Kayabacho 2-chome Chuo-ku Tokyo, JP)
Download PDF:
Previous Patent: VECTORIAL MODULATOR
Next Patent: DEVICE FOR AUTOMATICALLY ADJUSTING AN ELECTRONIC CARD COMPONENT, IN PARTICULAR A POTENTIOMETER
Next Patent: DEVICE FOR AUTOMATICALLY ADJUSTING AN ELECTRONIC CARD COMPONENT, IN PARTICULAR A POTENTIOMETER