Research on High Efficiency Doherty Amplifier for Base Station

With the development of wireless communication systems,the demand for data and information is increased.Power amplifier as one of the most important modules whose performance is essential for the overall system.To overcome the threat of rapid growth of mobile data and services and the shortage of spectrum resources,and for the appearance of modulation modes of high PAR such as OFDM modulation,for which a high requirement on the linearity of PA is put forward.In order to ensure signal linearity,the power back off method is generally used.Doherty technology can make the amplifier maintain high efficiency in a wide rang of power output.