宽带微波功率放大器的研究

发布时间：2018-04-12 23:03

本文选题：功率放大器 + 合成技术　；参考：《西南科技大学》2017年硕士论文

【摘要】：近年来,随着现代通信体系的发展,国内通信系统也在发生着巨大的变化,其应用正由小容量、低频、窄带、短距离传输向大容量、高频甚至跨频段、宽带、远距离传输的方向发展。这些变化反过来也促进了通信基础设施的日益完善,也无疑对无线通信的相关设备提出了越来越高的要求。微波功率放大器作为无线通信信号发射机的一个重要组成部分,具有举足轻重的地位,其性能的优劣直接影响着通信系统的质量和技术水平。本文从微波功率合成的角度,设计了一款应用频段为2~6GHz,输出功率为40W的微波功率放大器。本文主要贡献如下:1.调研了通信系统的发展现状,微波功率放大器的国内外研究现状,分析了微波功率放大器的相关技术指标,对论文所做功放的实现方案进行了详细的分析与论证。2.对常见的功率合成技术进行了分析与研究,并基于奇偶模分析法设计了一种应用于功分/合成技术的宽带3d B电桥,这种结构具有隔离度高、功率容量高、一致性好等特点,利用该方法可以设计带宽更宽的功率分配器。3.对增益均衡技术进行了分析与研究,定性分析了谐振枝节参数变化与均衡曲线变化规律,利用谐振枝节匹配法并设计出一种适用于本功放增益均衡需求的均衡器,有效地改善了功放增益的平坦度。4.对所做的功分器、均衡器进行了PCB制版和测试,对整个功放进行了功率测试,并最终得到了测试结果。
[Abstract]:In recent years, with the development of modern communication system, the domestic communication system is also undergoing tremendous changes. Its applications are changing from small capacity, low frequency, narrow band, short distance transmission to large capacity, high frequency and even across frequency band, broadband.The direction of long distance transmission.These changes, in turn, promote the improvement of communication infrastructure, and undoubtedly put forward higher and higher requirements for wireless communication related devices.As an important part of wireless communication signal transmitter, microwave power amplifier plays an important role. Its performance directly affects the quality and technical level of communication system.In this paper, a microwave power amplifier with an output power of 40W and a frequency band of 2Hz is designed from the point of view of microwave power synthesis.The main contributions of this paper are as follows: 1.This paper investigates the development of communication system, the domestic and international research status of microwave power amplifier, analyzes the relevant technical specifications of microwave power amplifier, and analyzes and proves the realization scheme of power amplifier in detail.This paper analyzes and studies the common power combination techniques, and designs a wideband 3D B bridge based on parity mode analysis, which has the characteristics of high isolation, high power capacity and good consistency.This method can be used to design a power divider with wider bandwidth.This paper analyzes and studies the gain equalization technique, qualitatively analyzes the variation of resonant branch parameters and equalization curves, and designs an equalizer suitable for the gain equalization of local amplifier by using the resonance branch matching method.The flatness of power amplifier gain is improved effectively.The PCB plate-making and testing of the equalizer and the power test of the power amplifier are carried out, and the test results are obtained.
【学位授予单位】：西南科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN722.75

【参考文献】