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RF and microwave power amplifier designs based on novel power dividing/combining techniques.

机译：基于新型功率分配/合并技术的RF和微波功率放大器设计。

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摘要

With the rapid advancements of the military and commercial communications systems, the demands for high power solid-state power amplifiers with high efficiency and low cost have greatly increased. Because of the limited output power from single solid-state device, combining the power from multiple devices to achieve higher power levels is inevitable, especially in the design of microwave and millimeter-wave power amplifiers. The primary objective of this research is to develop high efficiency and compact power combining circuits for high power multiple-device power amplifier designs. Four power combining techniques have been proposed for different power amplifier applications at RF and microwave frequencies.; First, two Ka-band eight-device power combining amplifiers based on the slotted-waveguide power dividing/combining circuits are presented: a resonant design for narrowband power combining and a traveling-wave design for broadband power combining. The resonant slotted-waveguide power amplifier provides 31.6 dBm (1.45 W) output power at 1-dB gain compression (Pout 1dB ) with a power combining efficiency (PCE) of 72% at 33 GHz and the measured 3-dB bandwidth of 3.8%. In the traveling-wave power amplifier, both of the power combining efficiency (PCE) and the 3-dB small signal bandwidth have improved to 80% and 3.2 GHz respectively. The measured Pout 1dB for the traveling-wave power amplifier is 33 Min (2 W) at 32 GHz. Besides the advantages of having low profiles and high combining efficiencies, both of the proposed slotted-waveguide power-combining circuits have the capability of efficiently heat-sinking active devices. These designs are also tolerant to device failures.; In the second part of this thesis, two multiple-device power-combining amplifiers have been developed based on an extended-resonance power combining technique. In the class-B push-pull power amplifier design, the differential operation and equal power dividing/combining have been realized. Thereby, not only the resulting layout of the power amplifier is simple and compact, but also a high PCE of 93% has been achieved. The class-B push-pull power amplifier has exhibited a 30 dBm Pout 1dB at 1.8 GHz with a power added efficiency of 59%. A novel broadband power dividing/combining circuit synthesis approach has been developed to design a 4-device broadband power amplifier. A power combining efficiency of 90% has been obtained between 5 to 9 GHz. The measured Pout 1dB of the 4-device power amplifier is 31.9 dBm (1.6 W) at the 7 GHz with 1-dB large signal bandwidth of 5 GHz. The compact layouts of both power amplifiers make them suitable for RFIC and MMIC fabrication. The thesis is concluded by summarizing the main contributions and discussing the implications and directions of future work.
机译：随着军事和商业通信系统的迅速发展，对具有高效率和低成本的高功率固态功率放大器的需求已大大增加。由于单个固态设备的输出功率有限，因此将多个设备的功率组合起来以达到更高的功率水平是不可避免的，尤其是在微波和毫米波功率放大器的设计中。这项研究的主要目的是为高功率多器件功率放大器设计开发高效，紧凑的功率组合电路。已经针对射频和微波频率下的不同功率放大器应用提出了四种功率组合技术。首先，提出了两个基于缝隙波导功率分配/合并电路的Ka波段八路功率合并放大器：用于窄带功率合并的谐振设计和用于宽带功率合并的行波设计。谐振缝隙波导功率放大器在1 dB增益压缩（Pout 1dB）时提供31.6 dBm（1.45 W）输出功率，在33 GHz时的功率组合效率（PCE）为72％，测得的3-dB带宽为3.8％ 。在行波功率放大器中，功率组合效率（PCE）和3 dB小信号带宽分别提高到80％和3.2 GHz。对于行波功率放大器，测得的Pout 1dB在32 GHz下为33 Min（2 W）。除了具有低轮廓和高合并效率的优点之外，所提出的两个缝隙波导功率合并电路均具有有效地散热有源器件的能力。这些设计还可以容忍设备故障。在论文的第二部分，基于扩展谐振功率合成技术，开发了两个多器件功率合成放大器。在B类推挽功率放大器设计中，已经实现了差分操作和相等的功率分配/合并。由此，不仅功率放大器的最终布局简单而紧凑，而且还实现了93％的高PCE。 B类推挽功率放大器在1.8 GHz频率下具有30 dBm Pout 1dB，功率附加效率为59％。已经开发出一种新颖的宽带功率分配/合并电路综合方法来设计4器件宽带功率放大器。在5至9 GHz之间获得了90％的功率合并效率。在7 GHz，1 dB大信号带宽5 GHz的情况下，在4 GHz功率放大器上测得的Pout 1dB为31.9 dBm（1.6 W）。两种功率放大器的紧凑布局使其适用于RFIC和MMIC制造。通过总结主要研究成果并讨论未来工作的意义和方向来总结论文。

著录项

  • 作者

    Jiang, Xin.;

  • 作者单位

    University of Michigan.;

  • 授予单位 University of Michigan.;
  • 学科 Engineering Electronics and Electrical.
  • 学位 Ph.D.
  • 年度 2005
  • 页码 201 p.
  • 总页数 201
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 无线电电子学、电信技术;
  • 关键词

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