微波宽带功率合成网络技术研究

发布时间：2018-06-28 05:34

本文选题：宽带 + 功率合成　；参考：《电子科技大学》2017年硕士论文

【摘要】：连年来微波通讯系统快速成长,相应的也敦促了对于微波宽频带、大功率和高效率的微波功率合成器的研发。本文重点阐述了微波功率合成放大器的匹配网络结构,及其核心组成部分。首先功率分配合成器通过将一路微波电磁信号的能量,按照一定的比例同时分配给两路或是多路微波功率输出,当然通常的功率分配比例都是等比的。然后将这多路的分配传输下来的信号在每一支路分别经过功率放大器放大,再对同样的功率分配电路对称使用,让每一支路放大后的微波功率输出到一个合成的支路上输出,则此时由一路输入的微波功率相当于经过了多路放大器的级联的放大。然而最巧妙的是这种多路放大合成的功率放大方式,避开了每一个单独微波功率放大器的输出功率的上限要求,而使叠加的功率通过无源传输线输出,从而有效的解决了微波通信系统中输出功率不足的问题。接着,本文介绍了电磁波在径向传输线中存在的形式和特征,为本文分析和讨论径向波导功率分配合成器提供了理论基础。并在此基础上系统介绍了径向波导功率分配器的设计理论和仿真过程,探讨了降低合成电路损耗,提高合成效率和带宽的方法。随后,本文研究和生产了运行在2GHz-6.2GHz的5路径向功率分配器,输入与输出回波消耗各自小于16.3dB和10.2dB,插入损耗在7.4dB-7.8d B之间。再又用同样的方式仿真和生产运行在了2GHz-6.2GHz频率范围内的12路功率合成器,输入与输出回波消耗各自小于14.8dB和9.3dB,插入消耗在10.4dB-11.1dB之间。然后本文在第四章,按照功率合成放大器的理论构造和生产了一个工作在2.0GHz-6.2GHz的输出功率大于60w的功率合成器。测试成效显示,该合成器的饱和输出功率大于47.8dBm,在频点2.5GHz和3.5GHz处为最高功率输出达到了49.3dBm,频率范围内增益大于48dB,增益平坦度在3dB之内,输入驻波比小于1.5。
[Abstract]:The rapid growth of microwave communication systems over the years has prompted the development of broadband, high-power and high-efficiency microwave power synthesizers. This paper focuses on the matching network structure of microwave power synthesis amplifier and its core components. First, the power distribution synthesizer distributes the energy of a microwave electromagnetic signal according to a certain proportion to two or more microwave power output at the same time, of course, the power distribution ratio is equal. Then the signals transmitted by the multi-channel distribution are amplified by a power amplifier in each branch respectively, and then the same power distribution circuit is used symmetrically, so that the microwave power after each branch amplification is output to a composite branch road output. Then the microwave power input from one channel is equivalent to the amplifier cascade amplification. The most ingenious thing, however, is that this multiplex power amplification method avoids the upper limit of the output power of each individual microwave power amplifier and causes the superimposed power to be outputted through a passive transmission line. Thus the problem of insufficient output power in microwave communication system is effectively solved. Then, the form and characteristics of electromagnetic wave in radial transmission line are introduced, which provides a theoretical basis for the analysis and discussion of radial waveguide power distribution synthesizer. On this basis, the design theory and simulation process of radial waveguide power divider are systematically introduced, and the methods of reducing the loss of synthesis circuit and improving the synthesis efficiency and bandwidth are discussed. Subsequently, a 5-path power divider running at 2GHz to 6.2GHz is studied and produced. The input and output echo consumption is less than 16.3dB and 10.2dB, respectively, and the insertion loss is between 7.4dB-7.8 dB. The 12-channel power synthesizer running in the frequency range of 2GHz to 6.2GHz is simulated and produced in the same way. The input and output echo consumption is less than 14.8dB and 9.3 dB respectively, and the insertion consumption is 10.4dB-11.1 dB. In chapter 4, a power synthesizer with output power greater than 60w operating at 2.0GHz to 6.2GHz is constructed and fabricated according to the theory of power synthesizer. The test results show that the saturation output power of the synthesizer is more than 47.8 dBm.The maximum power output at 2.5GHz and 3.5GHz is 49.3 dBm. the gain in the frequency range is more than 48dB, the gain flatness is within 3dB, and the input standing wave ratio is less than 1.5.
【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】：TN73

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