高效率功率放大器技术研究
发布时间：2018-11-08 07:03
【摘要】：近年来,随着无线通信迅猛发展,对网络容量和数据传输能力的需求日益增强。为了满足日益增加的通信需求,大量基站被建造。另一方面,随着经济发展,人民生活水平提高,手机使用量猛增已经进入千家万户。功率放大器作为无线通信中不可或缺的重要组成部分,其性能直接影响无线通信的质量。并且功率放大器是无线通信系统中主要的能耗元件,其效率直接影响到无线通信中电力资源的利用率,由于无线通信设备数量众多,高效率的功率放大器将节约大量电力资源,因此高效率功率放大器研究对于响应低碳环保可持续发展的号召节约能源有着重要意义。本文先介绍了放大器基本工作原理、分类及其性能指标,对比分析了各放大器工作状态及其特点。由于F类放大器具有高效率的特点,选取F类放大器作为主要研究对象,并详细介绍分析了F类放大器工作原理。然后介绍了Doherty放大器工作原理、工作状态,以及由其发展的各种结构的Doherty放大器。并将F类放大器与Doherty放大器结合,既有F类放大器高效率的特性,又能够在一定回退功率范围内保持这种高效率。通过仿真设计一种对称结构Doherty放大器,进而测试验证了其性能,根据测试结果发现其不足并进行改进。本文主要工作包含以下几个方面:首先选取CREE公司的CGH40010晶体管,通过Agilent公司的ADS2009进行仿真设计,设计了一款单级F类放大器和主功放工作在F类工作点的对称结构的Doherty放大器。并将两种放大器加工测试,通过测试分析其不足,进而提出改进方法,通过ADS2009进行仿真,验证改进方法的可行性。根据实际测试发现,F类放大器以及对称结构Doherty放大器在中心频率2.1GHz处都具有较高的效率,其中F类放大器在10W输出功率时PAE达到70%,对称结构Doherty放大器在回退范围内PAE达到53%以上。通过分析,发现由于对称结构Doherty放大器峰值功放电流小造成了回退功率不够,因此通过ADS2009仿真设计了一款非对称结构Doherty,通过仿真结果发现非对称结构在回退约6dB时效率达到70%以上。
[Abstract]:In recent years, with the rapid development of wireless communication, the demand for network capacity and data transmission capacity is increasing. In order to meet the increasing demand for communication, a large number of base stations have been built. On the other hand, with economic development, people's living standards, mobile phone use has soared into thousands of households. Power amplifier is an indispensable part of wireless communication, and its performance directly affects the quality of wireless communication. Power amplifier is the main energy consumption component in wireless communication system, and its efficiency directly affects the utilization of power resources in wireless communication. Because of the large number of wireless communication equipment, the high efficiency power amplifier will save a lot of power resources. Therefore, the study of high efficiency power amplifier is of great significance for energy conservation in response to the call of low carbon environmental protection and sustainable development. In this paper, the basic working principle, classification and performance index of the amplifier are introduced, and the operating state and characteristics of each amplifier are compared and analyzed. Due to the high efficiency of the class F amplifier, the class F amplifier is selected as the main research object, and the working principle of the class F amplifier is introduced and analyzed in detail. Then, the working principle and working state of Doherty amplifiers are introduced. The Doherty amplifiers with various structures developed by them are also introduced. The combination of class F amplifier and Doherty amplifier not only has the characteristics of high efficiency of class F amplifier, but also can keep the high efficiency in a certain range of recoil power. A symmetrical Doherty amplifier is designed by simulation, and its performance is verified by test. The shortcomings are found and improved according to the test results. The main work of this paper includes the following aspects: firstly, the CGH40010 transistors of CREE Company are selected and simulated by ADS2009 of Agilent Company. A single stage F type amplifier and a symmetric Doherty amplifier with the main power amplifier working at the F working point are designed. Two kinds of amplifiers are processed and tested, and their shortcomings are analyzed, and then an improved method is put forward. The feasibility of the improved method is verified by ADS2009 simulation. According to the actual test, the class F amplifier and the symmetrical structure Doherty amplifier have high efficiency at the center frequency 2.1GHz, in which the F type amplifier has a PAE of 70 when the output power is 10 W. The PAE of the symmetrical Doherty amplifier is over 53% in the back range. Through analysis, it is found that the low peak power amplifier current of the symmetrical Doherty amplifier leads to the insufficient back-to-back power, so an asymmetric structure Doherty, is designed by ADS2009 simulation. The simulation results show that the efficiency of the asymmetric structure is over 70% when the 6dB is withdrawn.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN722.75
本文编号：2317734
[Abstract]:In recent years, with the rapid development of wireless communication, the demand for network capacity and data transmission capacity is increasing. In order to meet the increasing demand for communication, a large number of base stations have been built. On the other hand, with economic development, people's living standards, mobile phone use has soared into thousands of households. Power amplifier is an indispensable part of wireless communication, and its performance directly affects the quality of wireless communication. Power amplifier is the main energy consumption component in wireless communication system, and its efficiency directly affects the utilization of power resources in wireless communication. Because of the large number of wireless communication equipment, the high efficiency power amplifier will save a lot of power resources. Therefore, the study of high efficiency power amplifier is of great significance for energy conservation in response to the call of low carbon environmental protection and sustainable development. In this paper, the basic working principle, classification and performance index of the amplifier are introduced, and the operating state and characteristics of each amplifier are compared and analyzed. Due to the high efficiency of the class F amplifier, the class F amplifier is selected as the main research object, and the working principle of the class F amplifier is introduced and analyzed in detail. Then, the working principle and working state of Doherty amplifiers are introduced. The Doherty amplifiers with various structures developed by them are also introduced. The combination of class F amplifier and Doherty amplifier not only has the characteristics of high efficiency of class F amplifier, but also can keep the high efficiency in a certain range of recoil power. A symmetrical Doherty amplifier is designed by simulation, and its performance is verified by test. The shortcomings are found and improved according to the test results. The main work of this paper includes the following aspects: firstly, the CGH40010 transistors of CREE Company are selected and simulated by ADS2009 of Agilent Company. A single stage F type amplifier and a symmetric Doherty amplifier with the main power amplifier working at the F working point are designed. Two kinds of amplifiers are processed and tested, and their shortcomings are analyzed, and then an improved method is put forward. The feasibility of the improved method is verified by ADS2009 simulation. According to the actual test, the class F amplifier and the symmetrical structure Doherty amplifier have high efficiency at the center frequency 2.1GHz, in which the F type amplifier has a PAE of 70 when the output power is 10 W. The PAE of the symmetrical Doherty amplifier is over 53% in the back range. Through analysis, it is found that the low peak power amplifier current of the symmetrical Doherty amplifier leads to the insufficient back-to-back power, so an asymmetric structure Doherty, is designed by ADS2009 simulation. The simulation results show that the efficiency of the asymmetric structure is over 70% when the 6dB is withdrawn.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN722.75
【参考文献】
相关硕士学位论文 前1条
1 吴毅威;高效率功率放大器的研究与设计[D];电子科技大学;2010年
，本文编号：2317734
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