摘要
左手材料具有平板透镜聚焦效应,突破电磁波的衍射极限实现倏逝波的放大,其覆盖于微带天线上方,可以提高天线增益。设计了一种应用于UHF和WLAN的双频微带天线,通过在接地板上刻蚀"己"字形弯折缝隙的方法实现双频谐振。为了改善微带天线低频段的增益,设计了一种新型的哑铃型结构双频段左手材料,将其作为微带天线的覆层。测试结果表明,覆层左手材料微带天线的低频段和高频段的峰值增益分别为2.1dBi和7.4dBi。
Left-handed materials(LHMs)present flat lens effect which can enhance evanescent wave by breaking the diffraction limit of electromagnetic wave.And microstrip antenna gain can be improved based on LHMs.In the paper,a dual-frequency microstrip antenna is mentioned.Meander slots are etched on the ground plane to provide the dual-band operation.In order to improve gain of the antenna at the lower frequency,a novel periodic structure of LHMs is designed to cover the antenna.The measurement results show that the gain of microstrip antenna with LHMs is 2.1dBi and 7.4dBi at the two bands respectively.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2015年第10期272-275,共4页
High Power Laser and Particle Beams
基金
中国电子科技集团公司山西省重点实验室专项资金项目(ZX15ZS391)
国家重点基础研究发展计划项目(2013CBA01700)
国家国际科技合作专项资助课题(2014DFR10020)
关键词
左手材料
微带天线
双频天线
带宽
增益
left-handed materials
microstrip antenna
dual-band antenna
band
gain
