8mm波段功率合成放大器和波导滤波器的设计

发布时间：2018-01-18 11:41

本文关键词：8mm波段功率合成放大器和波导滤波器的设计　出处：《南京理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着现代电子技术的迅速发展,雷达、通信系统对发射机输出功率的要求越来越高。在8mm波段甚至更高频段,由于单个固态器件的输出功率有限,不能满足系统对大功率的需求,因此通常采用功率合成技术来提高系统的输出功率。论文首先基于径向波导功率合成技术,研制了 8mm波段四路功率合成放大器;而滤波器作为选频器件,是毫米波通信系统的重要部件之一,其性能指标直接影响着整个通信系统的运行质量。论文结合项目需求设计了适合于8mm波段的波导滤波器。本文的主要研究内容如下:论文的第一部分是对8mm波段功率合成放大器的研究,包括功率合成器无源网络及有源电路的实现。功率合成无源网络部分,为了克服功率合成器因幅度和相位不一致带来的合成效率下降的问题,采用径向波导作为功率合成网络的核心单元,整个无源网络由对称的矩形波导-同轴波导-径向波导-矩形波导功率分配/合成器以及背靠背结构的波导-微带探针过渡结构组成,为了扩展功率分配/合成器的工作带宽,在同轴探针的底部加入锥形结构,以实现同轴波导到径向波导的平滑过渡。在建模仿真后进行实物加工与测试,所测结果与理论设计基本一致;功率合成器有源电路部分,在4个背靠背波导-微带转换器中加载四片AMMC5040,结合无源网络结构实现四路功率合成放大输出。最终的测试结果显示,该功率合成器在32～38GHz频率范围内,合成效率均大于70%。论文的第二部分是对8mm波段波导滤波器的研究与设计,采用双边电感膜片结构,分析对比了几种常用的滤波器设计方法,采用场与路相结合的分析方法对该滤波器的尺寸进行了快速精确的计算;为了弥补加工误差,在谐振腔中加入调谐螺钉。最后,对设计的滤波器进行了实物加工和调试,并对测试结果进行了分析。
[Abstract]:With the rapid development of modern electronic technology, the communication system of radar, the output power of the transmitter of the increasingly high demand. In the 8mm band even higher frequency, the output power of single solid state device is limited, can not meet the system requirements of high power, usually adopt power synthesis technology to improve the output power of the system. Firstly, based on radial waveguide power synthesis technology, developed the 8mm band four way power amplifier; and the filter is used as a frequency selection device, is one of the important components of millimeter wave communication system, its performance directly affects the running quality of the whole communication system. The paper combining with the requirements of the project design for 8mm band waveguide filter. The main contents of this paper as follows: the first part of the thesis is the research of 8mm band power combining amplifier, including passive and active power combiner network circuit The synthesis of passive networks. The power part, in order to overcome the power combiner is reduced because the synthesis efficiency of amplitude and phase consistency of the problem, using a radial waveguide as the core unit of power combining network, the whole network is composed of passive rectangular waveguide coaxial waveguide - symmetric radial waveguide rectangular waveguide power divider / combiner and waveguide back-to-back structure the microstrip probe transition structure, in order to expand the bandwidth of a power divider / combiner, joined in the bottom of the coaxial probe cone structure, to achieve a smooth transition to the radial waveguide coaxial waveguide was fabricated and tested. In the simulation, the results is consistent with the theoretical design; active power combiner, loading four AMMC5040 in the 4 back-to-back waveguide to microstrip converter, combining the structure of passive network to achieve four way power combining amplifier output. The final The test results show that the power combiner in the frequency range from 32 to 38GHz, the second part of the synthesis efficiency was more than 70%. of the thesis is to study and design of 8mm band waveguide filter, inductor with bilateral diaphragm structure, analysis and comparison of several commonly used methods of filter design, using the method of analysis and the combination of the filter the size is calculated accurately and rapidly; in order to compensate for the processing error, adding tuning screw in the resonant cavity. Finally, the design of a filter for the physical processing and debugging, and the test results were analyzed.

【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN722;TN713

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