具有滤波特性的微带功分器的研究与设计

发布时间：2018-08-19 12:38

【摘要】：随着无线射频通信技术的飞速发展,微波射频电路的应用越来越广泛,对其要求也是越来越严格。作为无线射频系统中不可或缺的电路器件之一,功率分配器也得到了广泛的运用和深入的研究。为了有效减小微波射频电路的尺寸与损耗,有学者提出了具有带通响应的滤波功分器。该器件集成了滤波器的滤波选频作用与功分器的功率分配作用;并且这一重要射频器件越来越受到研究人员的关注。本文主要研究了具有单频及多频带通响应的滤波功分器的设计。首先介绍了功分器的一些相关基础理论,接着以传统的Wilkinson功分器为基础,完成了单通带与双通带滤波功分器的设计与实物加工,最后对三通带的滤波功分器进行了仿真优化。本文的主要内容如下:首先,从最简单的三端口网络出发,介绍了三端口网络的各项参数与特性。接着分析介绍了四分之一波长匹配网络,最后重点介绍传统的Wilkinson功分器,并运用奇偶模分析法对其进行了详细的分析。其次,研究了具有单频带通响应的滤波功分器的设计。基于耦合谐振器矩阵的功分器综合方法,通过将传统Wilkinson功分器中的四分之一波长变换器替换为具有带通响应的谐振器,实现了单通带滤波功分器。通过在输出端口处引入类Wilkinson结以及源-负载耦合,提高了功分器的端口隔离度和通带的频率选择性。实测与仿真结果吻合良好。最后,双频及三频带通响应的滤波功分器进行了研究。基于前面设计的单通带滤波功分器,通过并联通带的方法设计了一款双通带的滤波功分器。其实测结果验证了这一方法的可行性。接着通过调节该滤波功分器中多模谐振器的阻抗比,利用其最小杂散谐振频率实现了三频带通响应,并对其进行仿真优化。
[Abstract]:With the rapid development of radio frequency communication technology, microwave RF circuits are more and more widely used, and their requirements are becoming more and more strict. As one of the indispensable circuit devices in radio frequency system, power divider has been widely used and deeply studied. In order to reduce the size and loss of microwave RF circuits, a filter power divider with bandpass response is proposed. This device integrates filter frequency selection and power divider power distribution, and this important RF device is paid more and more attention by researchers. In this paper, the design of filter power divider with single frequency and multi-band pass response is studied. Firstly, some basic theories of the power divider are introduced, then based on the traditional Wilkinson power divider, the design and processing of the single pass band and double pass band filter power divider are completed. Finally, the filter power divider of the three-way band is simulated and optimized. The main contents of this paper are as follows: firstly, starting from the simplest three-port network, the parameters and characteristics of the three-port network are introduced. Then, the 1/4 wavelength matching network is analyzed, and the traditional Wilkinson power divider is introduced, and the odd-even mode analysis method is used to analyze it in detail. Secondly, the design of filter power divider with single band pass response is studied. Based on the coupling resonator matrix power divider synthesis method, by replacing 1/4 wavelength converter in the traditional Wilkinson power divider with a resonator with bandpass response, a single-pass band filter power divider is realized. By introducing Wilkinson like junction and source-load coupling at the output port, the isolation degree of the power divider and the frequency selectivity of the passband are improved. The measured results are in good agreement with the simulation results. Finally, the filter power divider with dual frequency and three-band pass response is studied. Based on the single pass band filter power divider, a double pass band filter splitter is designed. In fact, the test results verify the feasibility of this method. Then by adjusting the impedance ratio of the multi-mode resonator in the filter power divider, the three-band pass-through response is realized by using its minimum stray resonance frequency, and the simulation optimization is carried out.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN626

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