宽带波导功分网络研究

发布时间：2018-12-10 11:18

【摘要】：当前,以通信系统与雷达系统为代表的现代电子系统中,宽带波导功分网络是其中必不可少的核心组成单元,在构建天线阵列馈电网络,多通道收发组件等系统时均扮演着举足轻重的作用,尤其在固态功率放大器应用中,功率分配合成网络的工作带宽、插入损耗、输出端口间幅度和相位的一致性以及隔离度等特性是实现固态高功率分配合成组件的关键所在,同时也是衡量一个功率分配合成网络性能优劣的指标所在。本文首先分析了实际工程应用中经典的组成波导功分网络的基本单元,并在此基础上提出了一种新颖的宽带五端口波导功率分配合成结构。该功率分配合成结构具有工作带宽宽,输出端口间的幅相一致性和隔离度高以及加工装配简单等特点。基于该创新结构设计的宽带波导功率分配合成网络很好的解决了网络输出端口间相位和幅度一致性以及高隔离度的技术难题。针对本论文提出的创新结构以及对宽带波导功率分配合成网络的研究,本论文的主要研究内容如下:第一,研究了国内外宽带波导功率分配合成网络器件的研究现状及研究进展,详细分析了实际工程中常用于设计功率分配网络的四端口器件网络的散射矩阵特性。并针对基于波导窄边裂缝耦合的四端口Riblet耦合器和六端口波导耦合器进行了基本的理论分析。进而在此基础上,提出了一种结构新颖的五端口波导功率分配合成结构并对其进行了基本的原理分析。第二,基于前文的理论研究方法,设计实现了一款窄带(12.2%)一分二的波导功率分配合成单元,实测数据表明,在31GHz-35GHz的工作带宽内,该结构的插入损耗小于0.2dB,输入端口反射系数优于20dB,输出端口间的幅度和相位不平衡度优于±0.1dB和±0.7°,隔离度优于17dB。并根据实测结果对窄带单元进行了改进,研制了一款工作在Ka波段宽带(21.2%)一分二功率分配合成单元第三,在前文研制的一分二波导功率分配合成单元的研究基础上,设计实现了一款2n型一分八宽带波导功率分配合成网络,实测结果表明,在21%的相对带宽内,该波导功率分配合成网络的插损小于0.35dB,输入输出端口的反射系数优于15dB,输出端口间的幅度和相位的不平衡度优于±0.2dB和±1.5°,隔离度高于17dB。基于该一分八网络的实测结果,研制了一款非2n型的一分十波导功分网络。最后,对本论文所做的研究内容进行了总结,以及对今后的研究工作和方向进行了展望。
[Abstract]:At present, in the modern electronic system represented by communication system and radar system, wideband waveguide power distribution network is the essential component unit, and the antenna array feed network is constructed. Multi-channel transceiver modules play an important role in systems, especially in solid-state power amplifier applications, power distribution synthesis network bandwidth, insertion loss, The characteristics of amplitude and phase consistency and isolation between output ports are the key to realize the solid-state high-power distribution synthesis module, and are also the index to evaluate the performance of a power distribution synthesis network. In this paper, the basic elements of the classical waveguide power distribution network in practical engineering applications are analyzed, and a novel broadband five-port waveguide power distribution composite structure is proposed. The power distribution synthesis structure has the advantages of wide working bandwidth, high amplitude-phase consistency and isolation between output ports, and simple processing and assembly. The wideband waveguide power distribution synthesis network based on this innovative structure solves the technical problems of phase and amplitude consistency and high isolation between the output ports of the network. The main contents of this thesis are as follows: first, the main contents of this thesis are as follows: In this paper, the research status and progress of broadband waveguide power distribution synthesis network devices at home and abroad are studied, and the scattering matrix characteristics of four-port device networks, which are often used to design power distribution networks in practical engineering, are analyzed in detail. The basic theoretical analysis of four-port Riblet coupler and six-port waveguide coupler based on waveguide narrow-side crack coupling is presented. On the basis of this, a novel five-port waveguide power distribution synthesis structure is proposed and its basic principle is analyzed. Secondly, based on the previous theoretical research method, a waveguide power distribution synthesis unit with a narrow band (12.2%) is designed and implemented. The measured data show that the insertion loss of the structure is less than 0.2 dB in the operating bandwidth of 31GHz-35GHz. The reflection coefficient of the input port is better than 20 dB, the amplitude and phase imbalance between the output ports is better than 卤0.1dB and 卤0.7 掳, and the isolation is better than 17 dB. According to the measured results, the narrowband unit is improved, and a Ka broadband (21.2%) 1 / 2 power distribution synthesizer is developed, which is based on the research of the 1 / 2 waveguide power distribution synthesizer, which has been developed in the previous paper. A 2n type one-eight wideband waveguide power distribution composite network is designed and implemented. The measured results show that the insertion loss of the waveguide power distribution synthesis network is less than 0.35 dB, and the reflection coefficient of the input and output ports is better than 15 dB. The unbalance of amplitude and phase between the output ports is better than 卤0.2dB and 卤1.5 掳, and the isolation is higher than 17 dB. Based on the measured results of the sub-eight network, a non-2n type one-tenth-waveguide power distribution network is developed. Finally, the research content of this paper is summarized, and the future research work and direction are prospected.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN814

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