Design Of High Performance And Low Consumption Ratio Frequency Power Amplifier

With the development of the Ratio Frequency Communication, Ratio Frequency system is designed to be more miniaturized and integrated. For the integration is more and more advanced, it is very important to research on that how to reduce the system consumption.By introducing every module of the system, the thesis finds that the Power Amplifier module is the one of the most power consumption modules in the RF system. The consumption of the Power Amplifier needs to be reduced, if the power consumption of the system is minimized.The higher efficiency, the lower consumption is. Through the research of the styles of the Power Amplifier (Class A, AB, B, C, D and E), the switch-mode power amplifier has the higher efficiency than the conventional power amplifier does. So the Class E power amplifier is chosen.The normal Class E Power Amplifier has some disadvantages, such as more easily influenced by the noise of the system, substrate coupling effect, the restriction of the gate area, the harmonious distortion and so on. The performance of the Class E Power Amplifier is restricted by these disadvantages.Based on the previous discussion, the full differential circuit with cross-coupled feedback is used to improve the power amplifier performance.As the working frequency channel is considered, the SiGe technology is brought forward and the SiGe model is used to design the power amplifier for higher performance.Finally, the designed amplifier is simulated by using the EDA tool ADS. According to the results, the power amplifier designed has higher performance on harmonious signal restrain ability and switch characteristic, compared to the conventional class E power amplifier.