Abstract
A Doherty power amplifier with automatic adjustment power ratio of main and auxiliary amplifiers includes a RF input end, an adjustable trans-directional coupler, an automatic control bias circuit, an auxiliary power amplifier, a main power amplifier, a quarter-wavelength transmission line and a RF output end. The RF input end receives a RF signal, and the adjustable trans-directional coupler uses a variable capacitor to adjust the power ratio between the two output ports. With the adjustable trans-directional coupler, the Doherty power amplifier of this invention can automatically change the input power ratio between the main power amplifier and the auxiliary power amplifier at different input powers so that the amplifier can maintain a wider high conversion benefit interval at high output power.
Translated title of the contribution | Doherty power amplifier with automatic adjustment power ratio of main and auxiliary amplifiers |
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Original language | Chinese (Traditional) |
Patent number | I580176 |
IPC | H03F 3/20(2006.01); H03G 3/20(2006.01) |
State | Published - 21 04 2017 |
Bibliographical note
公開公告號: I580176Announcement ID: I580176