High frequency power amplifier module and wireless communication system

• Main Authors: Numanami, Masahito, Akamine, Hitoshi, Shibuya, Tsuyoshi, Adachi, Tetsuaki, Morikawa, Masatoshi, Nunogawa, Yasuhiro
• Format: Patent
• Language: English
• Published: 13.08.2002

The present invention relates to a high frequency power amplifier module (or a high frequency power amplifier) including a plurality of amplification lines for linear amplifications and for non-linear amplifications (or saturated amplifications), and a wireless communication system packaging the high frequency power amplifier module. More particularly, the invention relates to a technique effective when applied to a multi-mode communication type cellular mobile phone having a plurality of communication functions of different communication modes. A high frequency power amplifier module of a multistage amplifier construction comprising: an input terminal; an output terminal; a control terminal; and a mode switching terminal. The first amplification stage includes a dual gate FET, and a bias voltage according to a signal is applied to the first gate and the second gate of the dual gate FET from the control terminal and the mode switching terminal, and a radio signal from the input terminal is applied to the second gate such as the source of the dual gate FET. In dependence upon the signal from the mode switching terminal, the mode of the high frequency power amplifier module is for the GSM (i.e., for a non-linear amplifying action) and for the, EDGE (for a linear amplifying action).