Patent ID: 9225290
Filing Date: 2015-12-29
Classification: H03F

Abstract:
1. A radio frequency signal amplification system, comprising: an amplifier having an input terminal and an output terminal; an input coupler configured to divide an input signal into a first signal and a second signal; an attenuator electrically connected to the input terminal of the amplifier; a delay line connected between the input coupler and the attenuator; and a peak power detecting module configured to apply a peak power attenuation signal to the attenuator by taking a peak power level of the second signal into consideration, wherein the attenuator is configured to generate an attenuated signal to the input terminal of the amplifier by taking the peak power attenuation signal into consideration, wherein the attenuator comprises a hybrid coupler configured to decrease an amplitude of the attenuated signal as the peak power level of the peak power attenuation signal increases, and wherein the attenuator comprises: a first diode having a first positive node connected to the peak power detecting module, and a first negative node connected to a first port of the hybrid coupler; and a second diode having a second positive node connected to the peak power detecting module, and a second negative node connected to a second port of the hybrid coupler.