New compact Doherty power amplifier design for handset applications

In this paper, new compact Doherty power amplifier design for handset applications, which requires only two components for output network, is proposed. Based on simplified output network, the proposed Doherty power amplifier is analyzed. The proposed Doherty power amplifier is demonstrated experimentally with InGaP-HBT at 2.5 GHz. A PAE of 41.3% and an E-UTRA ACLR of -36.3 dBc at an average output power of 27.7 dBm are measured under LTE 10 MHz, QPSK, 12 RB operation, and the efficiency improvement from Class AB operation achieves 11%.