宽带小型化均衡器设计与建模研究

发布时间：2018-09-03 15:18

【摘要】：微波功率模块是大功率系统重要的组成部分,均衡器是补偿行波管增益波动的关键措施,与固态放大电路一起构成功率模块的驱动前端。均衡器的结构和性能对模块的有着重要影响,电路小型化的需求使均衡器小型化成为研究的重点,除了材料和工艺上的改进,新结构、新理论应用于均衡器设计是发展的关键。经过多年的技术积累,目前已有众多可应用于工程的均衡器电路。传统的设计方式效率低、工作量大,均衡器设计软件极大的解决了这个问题,软件平台的功能发挥重点在于强大的模型库支撑。本文简单分析了均衡器理论,利用威尔金森功分器和电磁波相位特性设计了基于功分器的6~18GHz的均衡器模型,体积小,结构简单。基于复合左右手传输线理论,在终端开路条件下实现小型化谐振器,设计了一款2~6GHz均衡器,体积优势明显,性能良好。目前平面结构的均衡器多为固定形式,难以实现二次调节,因此每款均衡器适用对象窄且不能修正加工与装配上引起的偏差。本文利用二极管的变容和变阻特性,完成了频率可调与衰减可调的两款可调均衡器设计,为下一步可调均衡器发展提供参考。基于均衡器设计平台,本文完成了平台模型库建模,模型覆盖常用频段0.8~40GHz,并对非微带模型的结构进行了简要的特性、参数介绍,可为用户设计均衡器提供设计指导。本文还完成了6~18GHz三级放大的小体积功率驱动模块设计,实现了-25dBm输入信号到26~28dBm输出功率的放大。
[Abstract]:Microwave power module is an important part of high power system. Equalizer is a key measure to compensate the gain fluctuation of TWT. It is combined with solid-state amplifier circuit to form the driving front end of power module. The structure and performance of equalizer have an important influence on the module. The demand of miniaturization of circuit makes the miniaturization of equalizer become the focus of research. Besides the improvement of material and technology, the new structure and the application of new theory to the design of equalizer are the key to the development of equalizer. After many years of technology accumulation, there are many equalizer circuits that can be used in engineering. The traditional design method is low efficiency and heavy workload. The equalizer design software solves this problem greatly. The function of the software platform lies in the strong model base support. In this paper, the theory of equalizer is briefly analyzed, and the equalizer model of 6~18GHz based on power divider is designed by using Wilkinson power divider and electromagnetic wave phase characteristics, which is small in size and simple in structure. Based on the theory of compound left-hand transmission line, the miniaturized resonator is realized under the condition of terminal open circuit. A 2~6GHz equalizer is designed, which has obvious volume advantage and good performance. At present, the equalizer of plane structure is usually in a fixed form, so it is difficult to achieve secondary adjustment. Therefore, each equalizer has narrow objects and can not correct the deviation caused by machining and assembly. In this paper, two tunable equalizers with adjustable frequency and adjustable attenuation are designed by using the variable-volume and variable-resistance characteristics of diodes, which provide a reference for the development of tunable equalizers in the next step. Based on the equalizer design platform, this paper completes the modeling of the platform model base. The model covers the usual frequency band of 0.840 GHz. The structure of the non-microstrip model is briefly characterized and the parameters are introduced, which can provide design guidance for the user to design the equalizer. In this paper, the small volume power driving module of 6~18GHz three-stage amplification is designed, and the output power of -25dBm input signal to 26~28dBm is amplified.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN715

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