P波段单脉冲阵列天线馈电网络分析与设计
发布时间：2018-07-13 12:30
【摘要】：本论文主要对P波段的单脉冲阵列天线馈电网络进行了分析与设计,该馈电网络用于3′16单元的八木天线阵列中。论文首先对八木天线及其分析方法等做了介绍;接着介绍了本论文中的八木天线阵列的结构形式,并应用阵列天线综合理论中的泰勒综合法,计算出了八木天线阵列的口径分布,通过口径分布编程得出了理论上的方位面和差方向图和俯仰面和方向图。然后,论文对馈电网络进行了介绍,包括馈电网络的形式、带状线传输线的特性、功分器的理论以及单脉冲技术的原理等,并且对添加了隔离电阻的威尔金森功分器和无隔离电阻的功分器进行了仿真,并对比了仿真结果。由于馈电网络工作在低频率的P波段,经过分析,论文最终将馈电网络拆分为5块功分网络进行单独设计,4块一分十二功分器和1块和差功分器,从而极大的减小了馈电网络的尺寸。之后根据功分器设计理论,论文对无隔离电阻的一分四空气带状线功分器进行了设计。之后创新性地设计了在结构上直接一分三的等功分功率分配器,级联在已经设计好的一分四功分器的四个输出端口上,组成一分十二的功分器网络来给阵列天线中三排的四个对应单元馈电;接着对和差网络进行了设计,使用结构简单的混合环,仿真调试到符合的设计要求。在馈电网络整体仿真环节中,论文将设计好的5块功分器网络通过Designer软件连接在一起进行仿真,仿真得到各输入口驻波都小于1.4,输出口的S参数幅度一致性小于0.2dB,相位一致性在10°以内,隔离度大于30dB。之后计算出了仿真的和差方向图,并与理论方向图进行了对比。论文最后,对加工的每块功分网络的指标进行了测试,并且用测试数据模拟了天线方向图,与仿真结果进行对比,证明了馈电网络设计的可行性。
[Abstract]:In this paper, the single pulse array antenna feed network in P-band is analyzed and designed. The feed network is used in the yagi antenna array with 3P16 element. This paper first introduces the Yagi antenna and its analysis methods, then introduces the structure of the Yagi antenna array in this paper, and applies Taylor synthesis method in the array antenna synthesis theory. The aperture distribution of Yagi antenna array is calculated and the theoretical azimuth plane and differential pattern and pitch plane and direction diagram are obtained by programming the aperture distribution. Then, the paper introduces the feed network, including the form of the feed network, the characteristics of the strip transmission line, the theory of power divider and the principle of monopulse technology, etc. The Wilkinson power divider with and without isolation resistor is simulated, and the simulation results are compared. Because the feed network works in the low frequency P band, after analysis, the paper divides the feed network into 5 power sub-networks and designs four sub-power dividers and one sum power divider separately. This greatly reduces the size of the feed network. Then, according to the design theory of power divider, the paper designs a four-point air strip power divider without isolation resistance. Then innovatively designed an equal-power divider with three points directly in structure, cascaded on the four output ports of the designed four-point divider. The power divider network is divided into 12 parts to feed the four corresponding units in the three rows of the array antenna. Then the sum difference network is designed and the hybrid loop with simple structure is used to simulate and debug to meet the design requirements. In the whole simulation link of feed network, the paper simulates the designed five power divider networks through designer software. The simulation results show that the standing wave of each input port is less than 1.4, the amplitude consistency of S parameter at the output is less than 0.2 dB, the phase consistency is less than 10 掳, and the isolation degree is more than 30 dB. Then the simulated sum difference pattern is calculated and compared with the theoretical one. Finally, the index of each power distribution network is tested, and the antenna pattern is simulated with the test data. The feasibility of the design of the feed network is proved by comparing the results with the simulation results.
【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】：TN820.15
本文编号：2119376
[Abstract]:In this paper, the single pulse array antenna feed network in P-band is analyzed and designed. The feed network is used in the yagi antenna array with 3P16 element. This paper first introduces the Yagi antenna and its analysis methods, then introduces the structure of the Yagi antenna array in this paper, and applies Taylor synthesis method in the array antenna synthesis theory. The aperture distribution of Yagi antenna array is calculated and the theoretical azimuth plane and differential pattern and pitch plane and direction diagram are obtained by programming the aperture distribution. Then, the paper introduces the feed network, including the form of the feed network, the characteristics of the strip transmission line, the theory of power divider and the principle of monopulse technology, etc. The Wilkinson power divider with and without isolation resistor is simulated, and the simulation results are compared. Because the feed network works in the low frequency P band, after analysis, the paper divides the feed network into 5 power sub-networks and designs four sub-power dividers and one sum power divider separately. This greatly reduces the size of the feed network. Then, according to the design theory of power divider, the paper designs a four-point air strip power divider without isolation resistance. Then innovatively designed an equal-power divider with three points directly in structure, cascaded on the four output ports of the designed four-point divider. The power divider network is divided into 12 parts to feed the four corresponding units in the three rows of the array antenna. Then the sum difference network is designed and the hybrid loop with simple structure is used to simulate and debug to meet the design requirements. In the whole simulation link of feed network, the paper simulates the designed five power divider networks through designer software. The simulation results show that the standing wave of each input port is less than 1.4, the amplitude consistency of S parameter at the output is less than 0.2 dB, the phase consistency is less than 10 掳, and the isolation degree is more than 30 dB. Then the simulated sum difference pattern is calculated and compared with the theoretical one. Finally, the index of each power distribution network is tested, and the antenna pattern is simulated with the test data. The feasibility of the design of the feed network is proved by comparing the results with the simulation results.
【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】：TN820.15
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相关硕士学位论文 前1条
1 杨涛;阵列天线及高功率馈电网络的设计[D];西安电子科技大学;2012年
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