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摘要微波毫米波天线是近来研究的重要课题，雷达天线的应用也越来越广泛，不仅在军队建设中有举足轻重的地位，在我们日常生活也意义重大。本文主要是对ka波段单脉冲天线阵列进行设计和研究，分析该天线的性能。69358
本文中主要对以下方面进行研究：
第一，在微带天线的基础上设计缝隙耦合馈电的微带天线贴片单元，通过加载纵缝有效的抑制交叉极化；
第二，设计一个十三端口功分器，按照二维泰勒分布规律来设计每段的长度，合理分布激励和相位，使功分器性能指标达到目标设计要求；
第三，设计和差馈电网络，采用缝隙耦合式波导和差器模型，通过尺寸和结构调整消除直通端口和耦合端口之间的相位差；
第四，设计单脉冲天线阵列，完成26×6单脉冲天线阵列。
本文在HFSS仿真软件的基础上对天线进行优化仿真，使天线的增益、副瓣、驻波比达到目标。
毕业论文关键词 缝隙耦合贴片单元 功分器 缝隙耦合 和差器 单脉冲天线
毕业设计说明书外文摘要
Title Research on the design of Ka-band monopulse antenna array
Abstract
Microwave and millimeter wave antenna is an important study subject recently. The radar antennas are widely used in many applications.And they have not only a pivotal position in the army construction but also great significance in our daily life. This thesis researches the design of Ka-band monopulse antenna array and explores the performance of the antenna.
Here are the main aspects of the study in this thesis:
Firstly, on the basis of microstrip antenna, a slot coupled feed microstrip patch antenna unit is designed, which has a suppression of cross polarization effectively by using the longitudinal seam;
Secondly, a thirteen port splitters is designed. The length of each branch line by adapting the two-dimensional Taylor distribution. And the exciting distribution will make the power splitter achieve the design requirements;
Thirdly, a sum-difference feeding network is designed.By using the slot-coupled wave guide model, the sum-difference feeding network is designed and optimized. The phase difference between the through port and the coupling port is eliminated by adjusting the structure size of the model;
Finally, a 26 ×6 monopulse antenna array is designed.
In this thesis, the antenna array with low sidelobe and high gain is designed and optimized by using the commercial software HFSS.
Keywords : Aperture-coupled patch element Splitters Slot Coupler Sum-difference network Monopulse
目 次
1 绪论 1
1.1研究背景和意义 1
1.2 ka波段单脉冲天线的概述 1
1.3 本文研究内容 2
2 设计原理 3
2.1 阵列天线原理 3
2.2 单脉冲技术 5
2.3 微带天线原理 8
2.4 和差网络原理