Abstract：To meet the design requirements of highefficiency and broadband of power amplifiers in wireless communication systems employing modulation signals with high peak to average power ratio (PAPR), an improved Doherty power amplifier (DPA) was investigated. To achieve the impedance transformations both in low power region and at saturation, a two impedance matching network design was proposed to simulate and design the main and auxiliary output matching networks, which could simplify the load modulation network of DPA and extend the bandwidth. The wideband DPA with 2.30～2.80 GHz was designed and measured, and the proposed method availability was verified. The results show that the designed DPA has the gain fluctuation less than 2 dB and the saturated output power more than 43.5 dBm over the frequency band of 2.30～2.80 GHz, while the saturated efficiency is from 66% to 71% with 6 dB backoff efficiency from 48% to 59%. The designed wideband DPA can satisfy the efficiency requirement of future wireless communication systems employing modulation signals with high PAPR.
孔娃, 夏景. 基于双阻抗匹配的宽带Doherty功率放大器设计[J]. 江苏大学学报（自然科学版）, 2017, 38(6): 682-686.
KONG Wa, XIA Jing. Design of wideband Doherty power amplifier based
on two impedance matching network[J]. Journal of Jiangsu University(Natural Science Eidtion)
, 2017, 38(6): 682-686.
2017, Vol. 38 
