超短波多频点电磁能量采集微型传感器天线  

VHF Multi-Frequency Electromagnetic Energy Harvesting Miniature Sensor Antenna

作　　者：王嘉誉 徐勇 林莹 WANG Jiayu;XU Yong;LIN Ying(School of Communication Engineering,Army Engineering University of PLA,Nanjing Jiangsu 210007,China)

机构地区：[1]中国人民解放军陆军工程大学通信工程学院,江苏南京210007

出　　处：《通信技术》2023年第7期815-821,共7页Communications Technology

基　　金：国家自然科学基金(U1531124)。

摘　　要：提出了一种用于收集战场超短波射频(Radio Frequency,RF)能量的多频点、小型化天线。天线采用共面波导馈电,以Hilbert分形结构为基础,加载交指结构线有效增大天线阻抗带宽,同时实现天线的小型化(0.12λ×0.07λ),便于微型传感器使用。天线在超短波波段内存在4个S(1,1)<-10 dB的工作频点,其中225~300 MHz内频点有两个,能够较为高效地采集战场内超短波干扰机、电台,尤其是常用特高频(Ultra High Frequency,UHF)电台的射频能量。天线垂直方向增益在-2 dBi左右,垂直面全向辐射特性良好。天线仿真结果与制作实物测试结果吻合良好。A multi-frequency within a wide frequency range,miniaturized VHF(Very High Frequency)antenna is proposed for harvesting rich VHF RF(Radio Frequency)energy in battlefield environments to power micro sensors.The antenna is fed by coplanar waveguide,the Hilbert fractal structure is used to extend the surface current path,and the interdigital structure line is loaded,which effectively increases the impedance bandwidth of the antenna and realizes the miniaturization of the antenna(0.12λ×0.07λ),thus it can be used by micro sensors.The antenna has four operating frequency points with S(1,1)<-10 dB in the 30~300 MHz frequency band.Among them,there are two internal frequency points at 225~300 MHz,which can efficiently harvest the RF energy of VHF jammers,radio stations,especially common UHF(Ultra High Frequency)radio stations in the battlefield.The vertical gain of the antenna is around-2 dBi,exhibiting good vertical omnidirectional radiation characteristics.In order to verify the accuracy of the design,the antenna is manufactured and tested,and the simulation and experimental results are in good agreement.

关 键 词：宽带 小型化 超短波天线 Hilbert分形天线 射频能量收集 

分 类 号：TN822.4[电子电信—信息与通信工程]