基于实频技术1.6-2.4GHz F类功放的设计与实现
发布时间：2019-01-06 17:03
【摘要】：F类功率放大器在微波领域具有良好的应用前景,受到业内特别关注。F类功放在宽带条件下要较好地抑制谐波和处理寄生参数是很困难的,因此讨论高效率宽带F类功放的文献不多。本文针对这一难题,在研究器件非线性电容和实频技术基础上,对F类功放的高效率和频带拓宽问题展开了分析、仿真模拟研究,并完成了一款新型宽带F类功放的设计与实现。论文在对F类功放效率特性的研究中,没有采用F类功放的常规谐波控制网络,而是借鉴E类功放中非线性电容(即非线性CDS)能使高效率区域扩大化的特性。重点研究F类功放中器件非线性CDS对漏极电压、电流波形的作用,创建了器件非线性等效模型,而这个模型的谐波阻抗对频率变化的敏感度很低。在设计放大器匹配网络时,将谐波阻抗带限制在高效率对应的区域内,从而把F类功放匹配电路的设计从常规的、复杂的过程简化为基波匹配问题。论文采用实频技术来设计宽带匹配网络,以拓展放大器带宽特性。最后,为了实验验证上述研究结果,论文建模仿真、加工制作完成一款1.6-2.4GHz新型F类功率放大器。对该放大器的测试表明：整个1.6-2.4GHz频带内(相对宽带为40%)PAE均优于63%。论文主要工作要点如下：1.在F类功放的分析与设计中,借鉴E类功放中非线性CDs在高效率区域内能够使谐波阻抗拓展的特性,用于控制F类功放中漏极电压、电流波形,以达到提高效率目的；2.对实频技术和达林顿综合技术进行研究；设计综合出目标匹配网络的初始拓扑网络和元件值;3.完整设计1.6-2.4GHz新型F类功率放大器,并进行了相应的制作和测试,实验验证了论文理论工作的可实现性。论文的相关工作,对微波功率放大器的设计、研究有一定的工程参考价值。
[Abstract]:Class F power amplifier has a good application prospect in microwave field, and it has attracted special attention in the industry. It is very difficult for F type power amplifier to suppress harmonics and deal with parasitic parameters well under the condition of wideband. Therefore, there are few literatures on high efficiency broadband F power amplifier. In this paper, based on the study of nonlinear capacitance and real frequency technology, the high efficiency and bandwidth widening of class F power amplifier are analyzed and simulated. The design and implementation of a new broadband F-type power amplifier is completed. In the study of the efficiency characteristics of class F amplifier, the conventional harmonic control network of class F amplifier is not used in this paper. Instead, the nonlinear capacitance (that is, nonlinear CDS) in class E amplifier can enlarge the high efficiency area. The effect of nonlinear CDS on drain voltage and current waveform in class F power amplifier is studied and a nonlinear equivalent model is established. The harmonic impedance of this model is very sensitive to frequency change. In the design of amplifier matching network, the harmonic impedance band is confined to the corresponding region of high efficiency, thus the design of F type power amplifier matching circuit is simplified from the conventional and complex process to the fundamental wave matching problem. In this paper, real-frequency technology is used to design broadband matching network to expand the bandwidth characteristics of amplifier. Finally, in order to verify the above research results, this paper models and simulates, and completes a new type F power amplifier of 1.6-2.4GHz. The test of the amplifier shows that the PAE in the whole 1.6-2.4GHz band (relative wideband is 40%) is better than 63. The main work of this paper is as follows: 1. In the analysis and design of class F amplifier, the nonlinear CDs in class E amplifier can expand the harmonic impedance in the high efficiency region, which can be used to control the drain voltage and current waveform in class F amplifier, so as to achieve the purpose of improving efficiency. 2. The real frequency technology and Darlington synthesis technology are studied, the initial topology network and component value of target matching network are designed and synthesized; 3. A new type F power amplifier of 1.6-2.4GHz is designed and tested. The experiment proves the realizability of the theoretical work in this paper. The related work of this paper has some engineering reference value for the design of microwave power amplifier.
【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：2403075
[Abstract]:Class F power amplifier has a good application prospect in microwave field, and it has attracted special attention in the industry. It is very difficult for F type power amplifier to suppress harmonics and deal with parasitic parameters well under the condition of wideband. Therefore, there are few literatures on high efficiency broadband F power amplifier. In this paper, based on the study of nonlinear capacitance and real frequency technology, the high efficiency and bandwidth widening of class F power amplifier are analyzed and simulated. The design and implementation of a new broadband F-type power amplifier is completed. In the study of the efficiency characteristics of class F amplifier, the conventional harmonic control network of class F amplifier is not used in this paper. Instead, the nonlinear capacitance (that is, nonlinear CDS) in class E amplifier can enlarge the high efficiency area. The effect of nonlinear CDS on drain voltage and current waveform in class F power amplifier is studied and a nonlinear equivalent model is established. The harmonic impedance of this model is very sensitive to frequency change. In the design of amplifier matching network, the harmonic impedance band is confined to the corresponding region of high efficiency, thus the design of F type power amplifier matching circuit is simplified from the conventional and complex process to the fundamental wave matching problem. In this paper, real-frequency technology is used to design broadband matching network to expand the bandwidth characteristics of amplifier. Finally, in order to verify the above research results, this paper models and simulates, and completes a new type F power amplifier of 1.6-2.4GHz. The test of the amplifier shows that the PAE in the whole 1.6-2.4GHz band (relative wideband is 40%) is better than 63. The main work of this paper is as follows: 1. In the analysis and design of class F amplifier, the nonlinear CDs in class E amplifier can expand the harmonic impedance in the high efficiency region, which can be used to control the drain voltage and current waveform in class F amplifier, so as to achieve the purpose of improving efficiency. 2. The real frequency technology and Darlington synthesis technology are studied, the initial topology network and component value of target matching network are designed and synthesized; 3. A new type F power amplifier of 1.6-2.4GHz is designed and tested. The experiment proves the realizability of the theoretical work in this paper. The related work of this paper has some engineering reference value for the design of microwave power amplifier.
【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：2403075
本文链接：https://www.wllwen.com/kejilunwen/dianzigongchenglunwen/2403075.html
