星载5G小型化天线的设计与分析  

Design and Analysis of Spaceborne 5G Miniaturized Antenna

作　　者：李凯 左文成 赵子文 谭康伯[1] LI Kai;ZUO Wencheng;ZHAO Ziwen;TAN Kangbo(School of Electronic Engineering,Xidian University,Xi′an 710071,China)

机构地区：[1]西安电子科技大学电子工程学院,陕西西安710071

出　　处：《电子科技》2022年第11期7-12,共6页Electronic Science and Technology

基　　金：国家自然科学基金(61086338)。

摘　　要：针对卫星通信中5G天线安装空间和结构尺寸存在限制的问题,文中基于梯形振子结构和L形弯折方式实现了星载5G天线的小型化设计。通过将对数周期天线的振子由矩形转变为长度更短的梯形,采用两个梯形结合1个90°扇形结构进一步合成该天线,优化振子结构,实现天线尺寸的横向缩减和小型化设计。文中将所设计天线应用于某型卫星平台中,研究不同摆放位置下的天线耦合度。结果表明,相较于传统结构,该小型化LPDA的横向尺寸从90 mm缩小到了65 mm,拥有更好的端口阻抗匹配特性和辐射性能,可以较好地满足5G卫星通信中载荷紧凑化、轻量化和频带集约化的应用要求。In view of the limitation of the installation space and structure size of 5G antenna in satellite communication,this study realizes the miniaturization design of the satellite-borne 5G antenna based on the trapezoidal oscillator structure and L-shaped bending mode.By transforming the vibrator of the log-period antenna from a rectangle to a shorter-length trapezoid,two trapezoids combined with a 90°sector structure are used to further synthesize the antenna,and the vibrator structure is optimized to achieve a horizontal reduction in antenna size and a miniaturized design.The designed antenna is applied to a certain type of satellite platform,and the antenna coupling degree under different placement positions is studied.The results show that compared with the traditional structure,the transverse size of the miniaturized LPDA is reduced from 90 mm to 65 mm,and it has better port impedance matching characteristics and radiation performance,which can better meet the application requirements of compact load,lightweight and frequency band intensification in 5G satellite communication.

关 键 词：5G 卫星通信 对数周期天线 小型化天线 回波损耗 辐射方向图 耦合度 

分 类 号：TN828.5[电子电信—信息与通信工程]