小型化超宽带蝶形印刷对数周期天线  

Miniaturized UWB Butterfly Printed Log-periodic Antenna

作　　者：丁小锐 姜兴[1] 孙逢圆[1] 李晓峰[1] 史宇航 DING Xiaorui;JIANG Xing;SUN Fengyuan;LI Xiaofeng;SHI Yuhang(College of Information and Communication,Guilin University of Electronic Technology,Guilin 541004,China)

机构地区：[1]桂林电子科技大学信息与通信学院,桂林541004

出　　处：《微波学报》2024年第3期17-21,33,共6页Journal of Microwaves

基　　金：国家自然科学基金(61761012);广西科技重大专项(桂科AA19254012);广西区青年科学基金项目(2021GXNSFBA196071)。

摘　　要：设计了一款用于微波医学成像系统的小型化超宽带蝶形印刷对数周期天线。在馈电线开端加载电感短柱改善了天线的阻抗匹配,在传统印刷对数周期天线上加载蝶形结构和U型贴片结构拓展了天线带宽并实现了小型化。天线尺寸为0.300λ×0.280λ×0.007λ(f=1.12 GHz),天线S_(11)<-10 dB的实测工作频带为1.12 GHz~4 GHz,最大实测增益达到6 dBi。天线的实测方向图在工作频带内实现了定向辐射,辐射效果好,该天线可以应用于微波脑检测系统等医学领域。A miniaturized ultra-wideband butterfly printed log-periodic antenna for microwave medical imaging systems is designed.An inductive stub is loaded at the beginning of the feed line to improve the impedance matching of the antenna,and butterfly and U-shaped patch structures are loaded on the conventional printed log-periodic antenna to expand the bandwidth and realize the miniaturization of the antenna.The size of the antenna is 0.300λ×0.280λ×0.007λ(f=1.12 GHz),the measured working band of the antenna with S_(11)<-10 dB is 1.12 GHz~4 GHz,and the maximum measured gain reaches 6 dBi.The measured directional map of the antenna achieves directional radiation in the operating band with good radiation effect,and the antenna can be applied to medical fields such as microwave brain detection system.

关 键 词：蝶形印刷对数周期天线 小型化 超宽带 

分 类 号：TN822.8[电子电信—信息与通信工程]