Design of Efficient Concurrent Dual-Frequency Doherty Power Amplifier Based on Step Impedance Low-Pass Filter

被引：1
|
作者：
Li, Guojin [1 ]
Xu, Wenyuan [1 ]
Nan, Jingchang [1 ]
Gao, Mingming [1 ]
机构：
[1] Liaoning Tech Univ, Sch Elect & Informat Engn, Huludao 125100, Peoples R China
来源：
ELECTRONICS | 2023年 / 12卷 / 19期
关键词：
concurrent dual-frequency; Doherty; step impedance low-pass filter; post matching network; step impedance converter;
D O I：
10.3390/electronics12194092
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
In view of the peak-to-average power ratio (PAPR) of wireless communication base stations, a Doherty power amplifier with high efficiency maintained at output power back-off (OBO) can effectively solve the problem of low efficiency of the traditional power amplifier at the point of power back-off. In this paper, we propose a method to implement a dual-frequency Doherty power amplifier (DPA) using a step-impedance low-pass filter to improve the bandwidth and efficiency of the DPA at output power back-off (OBO). Step impedance low-pass filters are used to solve the bandwidth limitations in traditional impedance converters and improve the efficiency of Doherty power amplifiers to a certain extent. In order to verify the proposed scheme, an efficient concurrent dual-band Doherty power amplifier operating at 2.0/3.5 GHz is designed and fabricated for the first range 1 (FR1) of 5G applications. In the measured results, the concurrent dual-band DPA achieves a saturated output power of 44 dBm and drain efficiency of 62% with a 6 dB back-off efficiency of 53% at 2.0 GHz and a saturated output power of 43.5 dBm and drain efficiency of 68% with a 6 dB back-off efficiency of 58% at 3.5 GHz.
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页数：14
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