An Efficient S-Band Doherty Power Amplifier Using Multi-state Integrated Matching

作者：Xiong, Zhenting; Wang, Jingying; Chen, Jingxiong; Wang, Hong^*

来源：CIRCUITS SYSTEMS AND SIGNAL PROCESSING, 2022.

DOI：10.1007/s00034-022-02173-6

• Doherty power amplifier
• Harmonic control
• High efficiency
• Multi-state

This paper proposes a 3.2-3.8-GHz Doherty power amplifier with simultaneous harmonic control, dual impedance matching, and wideband operation using a multi-state integrated matching network (MIMN). The MIMN controls the second harmonic open and third harmonic short at the center frequency of the carrier amplifier, enabling the carrier amplifier to perform inverse F operation. Similarly, it regulates the second harmonic short in the upper and lower sidebands, resulting in a hybrid harmonic operation. The proposed DPA, based on Cree's two HEMT devices, achieves a saturation efficiency of 62.6-69.9%, a 6 dB back-off efficiency of 47.3-61.1%, and a maximum output power of 43.63 dBm over the entire frequency range of 3.2-3.8 GHz.