基于WLAN应用的非均匀弯折线单极子天线  

Nonuniform Meander-line Monopole Antenna Applied to WLAN

作　　者：王晓川[1] 吕文中[1] 梁飞[1] 万帅 

机构地区：[1]华中科技大学电子科学与技术系,湖北武汉430074

出　　处：《现代电子技术》2010年第11期58-61,共4页Modern Electronics Technique

基　　金：教育部"新世纪优秀人才支持计划"资助项目(NCET-07-0329);湖北省自然科学基金(2008CBD315)

摘　　要：通过时域有限差分法,研究了非均匀弯折线单极子天线各弯折节的线宽和线长对天线谐振特性的影响,并对背面耦合贴片的作用进行了分析。结果表明,弯折节的线宽和线长对天线的谐振特性有较强的调节作用;适当改变各弯折节的线宽和线长可以有效地调节天线两个最低谐振频率的相对位置;耦合贴片可以在不影响第一谐振模式的基础上,有效地改善第二谐振模式的谐振特性,增加天线第二谐振模式的阻抗带宽。最后制备出一种背面带有耦合贴片的非均匀弯折线单极子天线,该天线的频带能够有效覆盖IEEE 802.11b/g（2.4-2.484 GHz）和IEEE 802.11a（5.15-5.35 GHz,5.725-5.825 GHz）三个频段,能够满足WLAN应用。The effect of geometric parameters of each meander-line section on the resonant characteristic of the meander-line antenna was studied and the impact of the back-couple patch was analyzed with FDTD method.The results demonstrate that the length and width of each meander-line section have an effective control function to the resonant characteristic of the meander-line antenna,and the back-couple patch can improve the impedance matching property and broaden the bandwidth of the higher resonant mode without any bad influence on the first resonant mode of the proposed antenna.A dual-band nonuniform meander-line monopole antenna with a back-couple patch for WLAN application was fabricated.The operation bands of this antenna cover IEEE 802.11b/g（2.4-2.484 GHz） and IEEE 802.11a（5.15-5.35 GHz,5.725-5.825 GHz）.It is suitable for the triple-band WLAN.

关 键 词：耦合贴片 弯折线 单极子天线 三频 无线局域网 

分 类 号：TN82[电子电信—信息与通信工程]