摘要
射频识别(RFID)技术的不断发展,对标签天线提出了更高的要求。普通标签天线直接应用于金属表面时,由于受到金属边界的影响,其性能会出现一定程度的下降。详细介绍了4种无源超高频抗金属标签天线的设计方法,包括调整天线与金属面的间距、采用吸波材料、引入高阻抗表面基板、采用平面倒F天线(PIFA)或微带天线结构,并分析了每种方法的优缺点及其对标签天线的阻抗匹配、带宽、尺寸、识别距离以及成本等方面的影响。微带贴片天线不仅具有低剖面、高方向性等优点,而且含有金属接地板,常用作抗金属标签天线的设计原型。在抗金属标签天线的设计与实际应用中,研究者可针对具体要求灵活运用这些设计方法。
With the development of radio frequency identification （RFID） technology, tag antennas are re- quired to possess higher performance. However, when a common tag antenna is directly placed on a metal surface, its performance degrades a lot due to the metallic boundary. For passive ultra- high frequency （UHF） anti-metal tag antennas ,this paper introduces four design methods including adjusting the distance between antenna and metal surface, using absorbing material, introducing a substrate of high-impedance surface, and utilizing planar inverted-F antenna（PIFA） or microstrip antenna, and discusses each method＇s properties and influences on impedance matching, bandwidth, size, recognition distance and cost etc. Mi- erostrip antenna has not only low profile and high directivity, but also a metallic ground floor, so it is usual- ly used as the prototype of anti-metal tag antennas. According to specific requirements, these methods can flexibly be applied to actual anti-metal tag antenna design.
出处
《电讯技术》
北大核心
2015年第6期704-712,共9页
Telecommunication Engineering
基金
上海市教委科研创新项目(11YZ138)
上海市科委重点支撑项目(12510501700)
上海海事大学科研基金项目(20120095)
上海海事大学研究生创新基金资助项目(2014ycx009)~~
关键词
抗金属标签天线
微带贴片天线
吸波材料
高阻抗表面
阻抗匹配
设计方法
anti-metal tag antenna
microstrip patch antenna
absorbing material
high impedance surface
impedance matching
design method
