MULTI-BROADBAND DOHERTY POWER AMPLIFIER

摘要

Radio frequency (RF) amplification devices are disclosed that include Doherty amplification circuits and methods of operating the same. In one embodiment, a Doherty amplification circuit includes a main carrier RF amplifier, a peaking RF amplifier, and a periodic quadrature coupler. To provide Doherty amplification, the peaking RF amplifier is configured to be deactivated while an RF signal is below a threshold level and is configured to be activated while the RF signal is above the threshold level. The periodic quadrature coupler is configured to combine a first RF split signal from the main carrier RF amplifier and a second RF split signal from the peaking RF amplifier into the RF signal, such that the RF signal is output from an output port while the peaking RF amplifier is activated. The periodic quadrature coupler allows the Doherty amplification circuit to provide broadband amplification in various RF communication bands.

主权项

1. A radio frequency (RF) amplification device comprising a Doherty amplification circuit configured to amplify an RF signal, wherein the Doherty amplification circuit comprises:
a main carrier RF amplifier; a peaking RF amplifier configured to be deactivated while the RF signal is below a threshold level and configured to be activated while the RF signal is above the threshold level; a periodic quadrature coupler having an output port configured to output the RF signal after amplification by the Doherty amplification circuit, wherein the periodic quadrature coupler is configured to combine a first RF split signal from the main carrier RF amplifier and a second RF split signal from the peaking RF amplifier into the RF signal such that the RF signal is output from the output port after amplification by the Doherty amplification circuit while the peaking RF amplifier is activated.