应用于LTE基站的L波段Doherty放大器

发布时间：2018-02-09 21:36

本文关键词： 功率放大器 Doherty技术高效率 L波段　出处：《重庆邮电大学学报(自然科学版)》2017年04期 　论文类型：期刊论文

【摘要】：射频功率放大器是现代无线通信系统中的重要组成部件之一,传统的功率放大器设计非常依赖射频工程师的工程经验,一般通过实物电路的反复调试达到设计指标。采用Doherty技术设计并实现了一种应用于长期演进(long term evolution,LTE)移动通信技术基站的L波段高效率功率放大器。设计中采用了安捷伦公司的先进设计系统软件,选取恩智浦公司型号为AFT20P140-4WN的横向扩散金属氧化物半导体(laterally diffused metal oxide semiconductor,LDMOS)功放晶体管,该晶体管工作频段为1 880 MHz~2 025 MHz。通过电路仿真与实物调试相结合的方式完成了整个设计。测试结果表明,所设计Doherty功率放大器的最大输出功率为45.3 d Bm,最高效率为37%,在4.2 d B功率回退的情况下,效率仍保持在30%左右。与传统的功率放大器设计相比,此设计方式缩短了设计周期,提高了设计成功率并降低了设计成本。
[Abstract]:RF power amplifier is one of the important components in modern wireless communication system. The traditional power amplifier design depends on the engineering experience of RF engineer. In general, the design target is achieved by repeated debugging of the physical circuit. An L band high efficiency power amplifier is designed and implemented by using Doherty technology for long term evolution mobile communication technology base station. Agilent's advanced design system software, The lateral diffused metal oxide semiconductors LDMOS (lateral diffused metal oxide LDMOS) transistors of AFT20P140-4WN are selected. The operating frequency band of the transistor is 1 880 MHz~2 025 MHz. The whole design is completed by combining circuit simulation with physical debugging. The test results show that, The maximum output power of the designed Doherty power amplifier is 45.3dBmand the maximum efficiency is 370.When the 4.2dB power recovers, the efficiency remains at about 30%. Compared with the traditional power amplifier design, this design method shortens the design period. The design success rate is improved and the design cost is reduced.
【作者单位】：重庆邮电大学光电工程学院;
【基金】：国家自然科学基金(61102026) 重庆邮电大学自然科学基金(A2015-47)~~
【分类号】：TN722.75;TN929.5

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