基于耦合加载的低剖面天线设计  

Design of a Coupling-load-based Low-profile Antenna

作　　者：宋阳[1] 薛锋章[1] 

机构地区：[1]华南理工大学电子与信息学院,广州510640

出　　处：《电讯技术》2013年第2期205-208,共4页Telecommunication Engineering

摘　　要：设计了一种小型化双频天线。通过在单极子天线上引入寄生耦合的方法,即在单极子顶部引入耦合加载板,既保证了单极子天线的辐射全向性又减小了电小天线的分布电容,从而使该天线具有宽频带、低剖面特性。采用仿真软件Ansoft HFSS进行仿真和优化,优化结果表明:该天线工作频率为824～960MHz/1 710～2 690MHz(驻波比小于等于2)。根据仿真模型制作了一款天线,实测驻波带宽可达811～1 050MHz/1 580～2 660MHz,且在水平面内辐射全向方向图。该天线在限制尺寸的情况下有效地展宽了带宽。A miniaturized dual-band antenna is proposed. By adding coupling-load electric board, the antenna can achieve broad bandwidth with a low profile. Ansoft HFSS is used to simulate and design a low-profile antenna based on coupling-load which VSWR is less than 2 in the 824 - 960 MHz and 1710 - 2 690 MHz. Finally, an antenna is fabricated based on the simulation model. The measured VSWR is less than 2 in 811 - 1 050 MHz and 1 580 - 2 660 MHz, and the horizontal radiation pattern is omnidirectional. The antenna has a broad bandwidth with a restricted size.

关 键 词：无线光纤分布系统 单极子 低剖面天线 耦合加载 

分 类 号：TN823.11[电子电信—信息与通信工程]