HFSS应用于生物医学工程的微带贴片天线阵设计

摘要在Rogers微波材料RT5880上设计一个输入阻抗为50Ω的2X2微带贴片天线阵列，并实现天线阵列工作在5.8GHz频率上，增益达到9dB以上以及相对带宽达到2~5%的要求。课题设计出的微带天线阵是应用于生物医学工程来测量生命体征的，比起采用基片集成波导技术设计的槽天线有着更小巧的体积和外型，同时也能和集成波导槽天线一样满足要求的增益。18928
运用了微带天线的理论计算求得了阵列元天线的尺寸，采用微带线知识设计功分器将输入功率4等份传输给4个天线，同时达到最佳的阻抗匹配，通过阵列天线的理论知识分析了2x2微带天线阵的电参数，包括阵列天线的方向图、增益和带宽。然后采用HFSS软件和ADS软件工具对设计出的微带天线阵进行建模仿真，得到良好的仿真结果。
关键词微带天线基片集成波导功分器天线阵列电参数 HFSS ADS
毕业设计说明书（毕业论文）外文摘要
Title   Design of microstrip patch antenna array used in    biomedical engineering
Abstract
A 2X2 microstrip patch antenna array with the input impendence of 50Ωis designed on Rogers microwave material RT5880, it can work on the frequency of 5.8GHz, and its gain is up to 9dB, and its relative bandwidth reaches 2~5% . The microstrip patch antenna array which designed in this subject is applied in the biomedical engineering in order to measure signs of life, compared with the substrate integrated waveguide slot antenna, its size is smaller, furthermore, it also can meet the requirements of gains as well as the substrate integrated waveguide slot antenna.
According to the theory of microstrip , we can acquire the size of the antenna array. We design power pider which can make the input power become 4 equal parts, then each part of input power will be transmitted to the unit of antenna array. The electrical parameters of the 2x2 microstrip patch antenna array are analyzed based on the theory of antenna array, including the pattern of the array antenna, gains and the bandwidth. Then the module of the microstrip array antenna is established, we simulate it by using HFSS and ADS, and we obtaine good results.
Keywords Microstrip antenna ； Substrate integrated waveguide ； Power pider； Antenna array ； Electrical parameters ； HFSS ； ADS
目   次
1 引言   1
1.1 天线的基本特征（电参数）   1
1.1.1 天线的辐射阻抗   2
1.1.2 天线的带宽   2
1.1.3 天线的方向图   2
1.1.4 天线的方向性系数   4
1.1.5 天线的效率   6
1.1.6天线的增益   6
1.2 天线阵列   7
1.2.1 电磁波干涉与叠加原理   7
1.2.2 阵列天线的方向图乘积定理   9
1.3 课题设计步骤   11
2 单个微带贴片天线的设计   12
2.1 微带辐射贴片尺寸设计   12
2.2辐射贴片与馈线的阻抗匹配设计   12
3 天线阵列的设计（包括功分网络）   21
3.1功分网络的设计   21
3.1.1功率分配比为1:2:1的四端口功分器设计   21
3.1.2功率分配比为1:1的三端口功分器设计   22
3.1.3 微带的拐角   24
3.2 2x2阵列形式的微带阵列天线的分析与综合   25
图29 阵列天线直角坐标方向图   27 HFSS应用于生物医学工程的微带贴片天线阵设计:http://www.youerw.com/tongxin/lunwen_40243.html