| 一种新型的单层介质宽频带圆柱共形微带天线 |
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| 引用本文： | 何芒,徐晓文.一种新型的单层介质宽频带圆柱共形微带天线[J].北京理工大学学报,2004,24(7):629-633. |
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| 作者姓名： | 何芒 徐晓文 |
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| 作者单位： | 北京理工大学,信息科学技术学院电子工程系,北京,100081 |
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| 基金项目： | 高等学校博士学科点专项科研项目 |
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| 摘 要： | 提出一种新型的单层介质宽频带圆柱共形微带天线.采用具有U形缝隙的金属贴片作为天线的辐射单元,缝隙的引入改变了贴片表面的电流分布,使天线的阻抗带增至39%左右.利用时域有限差分法(FDTD)结合圆柱分层媒质中谱域并矢格林函数的混合方法对该天线进行了全波分析,给出了天线单元的阻抗特性、辐射特性以及两天线单元间的互耦特性.该天线仅含有单层介质衬底,与叠层结构宽频带微带天线相比,剖面厚度减少约30%,更适合应用于天线剖面尺寸要求严格的场合.
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| 关 键 词： | 圆柱共形微带天线 时域有限差分法 格林函数 宽频带 介质 宽频带微带天线 圆柱共形微带天线 Conformal Microstrip Antenna Broadband Layer Single 要求严格 尺寸 剖面厚度 应用 叠层结构 辐射特性 互耦 元间 阻抗特性 天线单元 全波分析 混合方法 并矢格林函数 |
| 文章编号： | 1001-0645(2004)07-0629-05 |
| 收稿时间： | 2003/8/26 0:00:00 |
| 修稿时间： | 2003年8月26日 |
Novel Single Layer Broadband Cylindrically Conformal Microstrip Antenna |
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| HE Mang and XU Xiao-wen.Novel Single Layer Broadband Cylindrically Conformal Microstrip Antenna[J].Journal of Beijing Institute of Technology(Natural Science Edition),2004,24(7):629-633. |
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| Authors: | HE Mang and XU Xiao-wen |
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| Institution: | Department of Electronic Engineering, School of Information Science and Technology, Beijing Institute of Technology, Beijing 100081, China;Department of Electronic Engineering, School of Information Science and Technology, Beijing Institute of Technology, Beijing 100081, China |
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| Abstract: | A novel broadband cylindrically conformal microstrip antenna with a single substrate is presented. A patch with a U-shaped slot is employed as the radiating element, and the incurrence of the slot changes the current distribution on the patch. Through this the impedance bandwidth is extended to about 39%. A full-wave hybrid algorithm that combines the finite difference time-domain (FDTD) method and the dyadic Green's functions for cylindrically stratified media is used to analyze the impedance and radiation characteristics of this antenna, as well as the mutual coupling effects between the two antenna elements. Compared with the broadband microstrip antenna with stacked structure, the profile of this type of antenna is reduced by the order of about 30%. Thus it is very suitable for use on the situations where rigorous limitation on the size of the antenna profile is required, because only a single dielectric layer is involved in its structure. |
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| Keywords: | cylindrically conformal microstrip antenna finite difference time-domain method Green's functions broadband |
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