A Wideband High Efficiency Doherty Power Amplifier Based on Coupled Line Architecture

作者：Xie, Guangping^*; Tang, Zongxi; Zhang, Biao; Cao, Xin

来源：Microwave Journal, 2017, 60(9): 116-128.

A wideband high efficiency Doherty power amplifier (DPA) that works in the 1.85 to 2.4 GHz band (26 percent fractional bandwidth) employs two pairs of anti-coupled lines with stepped impedance resonators to replace the lambda/4 transmission lines in a conventional DPA for harmonic suppression and phase compensation. Maximum output power is between 43.0 and 44.1 dBm. At 6 dB output power back-off (OPBO), the maximum drain efficiency (DE) is 61.3 percent, with gain higher than 12 dB. In the saturated output power region, the efficiency is between 67 and 76.6 percent with gain higher than 8 dB. Compared with a conventional DPA, the third-order intermodulation distortion (IMD3) is reduced by 22 dB while efficiency and gain performance are greatly improved.

• 出版日期2017-9
• 单位电子科技大学