一种新型小尺寸三陷波超宽带天线设计  

Design of a Novel and Small Size UWB Antenna With Triple-Band Notched Characteristic

作　　者：蔡际周 官伯然[1] 

机构地区：[1]杭州电子科技大学天线与微波技术研究所,浙江杭州310018

出　　处：《电子科技》2018年第3期10-12,16,共4页Electronic Science and Technology

基　　金：国家自然科学基金(60673143);浙江省科技计划(2006C21020)

摘　　要：文中提出了一种新型小尺寸具有三陷波特性的UWB天线。所设计的天线基本几何结构由50Ω馈电线、圆形辐射贴片、缺陷地和一对开口谐振环组成,通过在天线的圆形辐射贴片上内嵌一对Y型贴片、地板上蚀刻出U型贴片和一对开口谐振环实现三陷波特性,天线的尺寸为30 mm×30 mm×1.6 mm。仿真和测试结果表明,该天线2.9~10.7GHz的频段内回波损耗<-10 d B,在3.7~4.2 GHz、5.15~5.825 GHz和7.9~8.4 GHz3个频段内具有陷波特性,分别有效抑制了C频段的卫星系统、WLAN系统和X频段卫星系统对超宽带系统的干扰。在除3个阻带频段外的其余UWB工作频段范围内,有着良好的辐射方向特性和稳定的增益。仿真结果和实验结果表现出了良好的一致性。A novel and small triple-band notched UWB antenna property is proposed. The proposed antenna that composed of a circular patch,a defected ground and a pair of split resonant rings fed by 50Ωmicrostrip. The triple rejection is achieved by etching an annular ring radiating patch with a pair of Y-shaped resonant elements that are embedded inside the patch,a U-shaped patch on the ground and a pair of split resonant rings. The fabricated antenna has a tiny size,only 30 mm × 30 mm × 1. 6 mm. The experinental and measured results show that the proposed antenna exhibits an impedance bandwidth over an ultra-wideband frequency range from 2. 9 to 10. 7 GHz with return loss less than-10 d B,except three stopbands at 3. 7 ~ 4. 2 GHz,5. 15 ~ 5. 825 GHz and 7. 9 ~ 8. 4 GHz for filtering the C,WLAN and X band signals respetively. It also demonstrates a nearly omnidirectional radiation pattern and a stable gain. The simulated results are compared with the measured performance and show good agreements.

关 键 词：UWB天线 三陷波 小型化 微带天线 

分 类 号：TF826[冶金工程—有色金属冶金]