DOI码：10.1109/TCSII.2024.3434572

所属单位：国立新加坡大学，中国科学技术大学，香港城市大学

教研室：Dept. ECE, Dept. EEIS, Dept. EE

发表刊物：IEEE Transactions on Circuits and Systems-II: Express Briefs

关键字：Broadband, Doherty power amplifier (DPA), monolithic microwave integrated circuit (MMIC)

摘要：In this brief, a novel continuous-mode asymmetrical Doherty power amplifier (CM-ADPA) is proposed. It is illustrated that by applying complex impedance at the power combining node, the continuous-mode impedance condition can be obtained for the main amplifier at both saturation and output power back-off (OBO) to obtain broadband high-efficiency performance. To further expand the bandwidth, an LC-ladder-based lumped Wilkinson divider and impedance inverter are employed for wideband power division and phase alignment between sub-amplifiers, respectively. To validate the proposed topology, a CM-ADPA monolithic microwave integrated circuit (MMIC) is implemented with a highly compact die size of 2.2 × 1.8 mm2 . The fabricated MMIC obtains a 4.4-5.6 GHz bandwidth. Within the operating band, the DPA exhibits a saturation output power of 40.7-41.0 dBm, a saturated drain efficiency (DE) of 53.7%- 59.4%, and a DE of 34.0%-43.8% at 8-dB OBO. Under a 100 MHz orthogonal frequency division multiplexing (OFDM) signal, the CM-ADPA also demonstrates good linearity and efficiency.

合写作者：Renlong Han,Falin Liu

第一作者：Jingyuan Zhang

论文类型：期刊论文

通讯作者：Xu Yan,Yongxin Guo

论文编号：10.1109/TCSII.2024.3434572

学科门类：工学

文献类型：J

卷号：71

期号：12

页面范围：4879-4883

是否译文：否

发表时间：2024-12-02

收录刊物：SCI、EI