摘要
提出一种馈电结构可实时变化的频率可重构天线.利用RF MEMS开关控制天线模型中矩形加载槽的长度来实现频率可重构,从天线等效LC振荡回路和谐振回路电流路径的改变等两方面分析了频率可重构原理.研究结果表明:所设计天线能工作在L、S两波段3个频率段上,即bluetooth、DCS/GSM和GPS频段.由于3个频段天线工作在同一模式下,所以方向图几乎完全一致.并且RF MEMS开关对馈线结构的调整可解决由于可重构而改变天线口径面辐射体结构带来的匹配问题,使得天线具有良好的可重构特性的同时还满足高辐射增益,实现了一副天线多功能的目的.
The antenna introduced in this paper is frequency-reconfigurable and the feed configuration can be changed, with the length of a rectangular slot being changed using an RF MEMS switch. The principle of frequency reconfigurability is analyzed both from antenna＇ s equivalent LC oscillation circuitry and from the changing route of resonant tank＇s current. The results indicate that the antenna can operate at three frequency bands： bluetooth, DCS/ GSM and GPS, all in the L/S band. Due to the same radiation mode, the radiation pattern of the antenna operating in the 3 bands is exactly the same. Changeable feed configuration using RF MEMS switch can solve the matching problem directly originating from the change of radiator structure. The results also show that the antenna has good reconfigurability and high radiation gain. The antenna can be used for multiple purposes.
出处
《应用科学学报》
CAS
CSCD
北大核心
2007年第5期469-474,共6页
Journal of Applied Sciences
基金
广西省自然科学基金(0342045)
广西教育厅科研项目(桂教科研[2002]22号)资助项目
关键词
馈电结构可变化
频率可重构天线
RF
MEMS开关
可重构原理
alterable feed configuration
frequency-reconfigurable antenna
RF MEMS switch
reconfigurable principle
