波导开槽天线.pdfVIP

第 30 卷第 10 期 Vo l. 30 陆 10 哈尔滨工程大学学报 2009 年 10 月 Jouma1 of Harbin Engineering University Oct. 2009 doi: 1O .3969/j. issn.1006 -7043.2009.10.018 共面波导宽频带微带缝隙天线的设计与分析 姜宇，肖鸿，刘兴朋鸟，滕巍 (哈尔滨工程大学信息与通信工程学院，黑龙江哈尔滨 150001) 摘 要:为了扩展微带的天线频宽，减小微带天线尺寸，扩大其在小型化宽频带通信系统的应用，提出一种改进的基于共 面波导(CPW) 的宽频带微带缝隙天线.采用较低介电常数(6， =2.2) 和厚度薄(h=0.8 mm) 的材料作为微带天线基板， 使得天线尺寸缩减了 30%. 利用 CST Microwave Studio 仿真软件对其进行仿真，得出输入反射系数曲线 SII 和辐射方向 图，其中心工作频率为 3.52 GHz ，获得 52% 的阻抗带宽(SII -10 dB) ，频率范围是 3.07 -4. 11 GHz ，频带得到展宽.根 据对影响天线性能的主要物理参数进行仿真、分析和优化，得到理想天线尺寸.实验结果表明，共面波导宽频带微带缝隙 天线比传统微带贴片天线性能有了较大的提高，采用共面波导馈电是可行性和有效性的. 关键词:共面波导;宽频带缝隙微带天线;CST 仿真;输入反射系数 中图分类号:TN 82 1. 3 文献标识码:A 文章编号: 1006-7043 (2009) 10-1180-05 Design and analysis of a CP飞机fed broadband microstrip slot antenna JIANG Yu ,XIAO Hong , LIU Xing-peng ,TENG Wei (College of Information and Communication Engineering , Harbin Engineering University , Harbin 150001 , China) Abstract: An improved cop1anar waveguide (CPW) based broadband microstrip slot antenna was developed that expands antenna bandwidth and reduces size. This shou1d increase the antenna s usefu1ness in small communication systems. A thinner materia1 (h = O. 8 mm) with a 10wer dielectric constant (s, = 2. 2) was used as the substrate , reducing the required size by 30%. Simu1ation software-CST Microwave Studio-was used to simu1ate the antenna and from this its reflection coefficient curve Sll and radiation paUem were obtained. The results of the simu1ation show that the centra1 frequency is 3. 52 GHz , the impedance bandwidth is 529毛 (Sll - 10 dB) , and the frequency range is 3.07 - 4. 11GHz , showing that bandwidth is significant