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摘要在微波通信和雷达发射系统中，为了保证足够远的传输距离，待传输信号须经过一系列功率放大直至获得足够大的功率再送至发射天线。单个固态源所能提供的功率受限于工艺水平而无法输出大功率。采用功率合成技术将多路固态器件输出功率进行同相叠加，是获得更高输出功率的有效途径之一。
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论文首先对多种功率合成方法进行调研，综述了国内外常见的功率合成技术，从芯片级功率合成、电路级功率合成到空间功率合成，阐明大功率合成的研究意义和国内外发展现状,并以固态电路为主要研究对象，对功率合成器件及合成系统进行了探索性的研究。10409
文章的内容主要包括：
1：详细介绍了微带线的结构以及主要特性，给出了微带合成理论。并详细比较了几种常见的微带功率合成器，结合指标要求，确定了选用Wilkinson功率合成器作为设计的基础。
2: 讨论功率合成系统中降低合成效率的因素,包括：合成网络插损，合成信号的幅度、相位不一致对合成效率的影响等。
3: 以Wilkinson功率合成器为基础设计出单枝节的四合一微带线功率合成器，用辅助软件ADS优化并仿真。详细分析仿真结果得出较大的合成效率,很低的插入损耗（-6.4dB）和各端口间很高的隔离度（-20.8dB）,并且各路的幅度相位一致性很好。
关键词：功率合成，插入损耗，传输损耗，隔离度，微带线，四合一功率合成器
毕业设计说明书（论文）外文摘要
Title the Design and Simulation of Multi-Channel Microwave Power Combiner
Abstract
In the system of microwave communication and radar transmitting, to guarantee the transmission distance, the pending transmission signal should be disposed by a series of power amplifications to obtain adequate power before it be send to transmitting antenna. As the single equipment of electro-vacuum can provide biggish output power, but it is restricted to application in missile launch system with harder machining, higher voltage, bigger size ,and so on . The technology of power combining, which composes multi-path solid state power devices in phase to gain a higher output power, which is one of the efficient measures to obtain the higher output power.
At first, in this thesis, the usual power combining techniques have been reviewed and summarized, including on-chip circuit and special techniques. Then the research significance and development trend of high-power combining techniques both in China and abroad are clarified. The power combining devices and the entire combining system mainly aiming at solid state circuit has been investigated.
The main contents are as follows:
1: Details of the structure and main characteristics of the micro-strip line have been discussed, and a micro-strip synthesis theory is proposed. Compare several common micro-strip power combiners seriously. Considering all the indicators, I choose the selection of Wilkinson power combiner as a design basis.
2: The ingredients which affect power combining efficiency and depress combining efficiency in the whole system have been discussed, including synthetic network insertion loss, synthesized signal amplitude and phase inconsistencies synthesis efficiency .At last, the conclusions have been proposed;
3: Design a four-in-one single minor micro-strip line power combiner with Wilkinson power combiner. Optimization and simulation with ADS (Advanced Design System). Detailed analysis of the simulation results has been done to get large synthesis efficiency, very low insertion loss (6.4 dB) and a high degree of isolation between ports (-20.8 dB), and the brightest of the amplitude and phase consistency.
Keywords: power combiner, insertion loss, transmission loss, isolation, micro-strip line, four-in-one power combiner