Ku波段频率扫描天线阵列设计研究
毕业设计说明书中文摘要天线是无线电设备的重要组成部分。随着通信的发展，天线系统在各种复杂环境的影响下，会导致通信质量大打折扣，因此对天线性能的研究显得日益重要，尤其是对高增益天线的研究，引起了广泛关注。79004
本文对于高增益天线的设计将根据频率扫描天线的原理。其中底座部分采用慢波线结构作为天线的馈电部分，在波导窄边开缝隙。为了满足辐射波束要求，慢波线上方采用喇叭结构，通过过渡结构将两部分连接后，缝隙给喇叭馈电辐射,将能量通过喇叭辐射到外部。
设计首先对慢波线结构进行了设计，通过波导裂缝天线的设计方法确定缝隙参数，针对仿真结果中出现的大驻波问题进行了分析，并采取了两种方法来降低因弯头而产生的较大的驻波带宽，其一是在弯头部位加螺钉，其二是改变弯头结构，对两种方法的影响因素进行了分析优化并与原结构进行了比较。最后设计频扫喇叭天线，按照相应方法选取合适的参数后，可使天线在15GHz到17GHz的频率范围内，实现了-41º～+45º的大角度扫描，增益普遍较高，且在中心频率附近增益达到20dB左右，实现了大角度扫描和高增益。
毕业论文关键词 频率扫描 缝隙天线 慢波线 喇叭
毕业设计说明书外文摘要
Title Design and research of high gain antenna array at Ku band
Abstract Antenna is an important part of wireless apparatus。With the development of communication system,communication qualities are deteriorated in complex environment。Hencc the performance of antenna has attracted widely attention。
The design of high gain antenna based on the principle of frequency scanning ,which use slow-wave line structure as the antenna feed part,and cut slots at the narrow wall of the rectangular waveguide。On the top of the slow-wave line structure,horn is used for radiating energy。This two parts are connected by the transition structure so that energy can be radiated from slot to the horn。
Firstly,the slot-wave line is designed。Through the waveguide slot antenna design method,gap parameters are determined。According to the simulation results of high standing wave,two methods are used to solve this problem。One is adding screw on elbow part,another is changing the structure of the elbow。The simulation results of the two methods are compared with the original structure。Finally,the frequency scanning horn antenna is designed,which working from 15GHz to 17GHz,can realize the angle scanning from -41 degree to 45 degree,and the gain is generally higher。Near the center frequency,the gain is about 20dB,the antenna can achieve large angle scanning and high gain。
Keywords Frequency scanning, Slot antenna, Slow wave line, Horn
目 录
1 绪论 1
1。1选题背景及意义 1
1。3设计目的和要求 2
1。4本文主要内容及安排 3
2 频扫天线阵列理论及设计方法 4
2。1 频扫天线阵列的基本理论 4
2。2 频扫天线阵列的参数 5
2。3 频扫天线阵列的参数计算 7
2。4 本章小结 9
3 频扫慢波线理论和设计