摘要
短波天线不仅要求超宽带(3~30 MHz),并且由于存在尺寸庞大的难题,对天线的小型化和结构简洁有苛刻要求。提出了一种金属线结构的新型单极子短波天线,结构简洁,通过分形辐射振子和T型馈电结构获得超宽工作频带和小型化性能,同时还能够调整天线姿态实现全向或定向辐射,以及一定程度上改变天线波束指向仰角。为验证设计的有效性,加工了一只微波频段的缩比天线样品。测试表明,该天线的VSWR<2.5阻抗带宽可达10倍频程(1~10 GHz);天线电尺寸仅为0.24λ(λ为天线工作频段低端对应波长);定向增益约4.7 d Bi。该天线在短波通信领域有重要应用前景。
Shortwave antenna not only requires ultra wideband(covering 3~30 MHz),but also requires miniaturization and simple structure due to its large size.A new monopole shortwave antenna with metal wire structure is proposed.The structure is simple.The ultra wide working frequency band and miniaturization structure are obtained by fractal radiation dipole and T-type feeding structure.Meanwhile,the antenna attitude can be adjusted to realize omnidirectional or directional radiation,and the antenna beam pointing elevation angle can be changed to a certain extent.In order to verify the effectiveness of the design,a microwave band scaled antenna sample is fabricated.The test results show that the VSWR of the antenna is less than 2.5,the impedance bandwidth is 10 octave(1~10 GHz),the electrical size of the antenna is only 0.24λ,whereλis the corresponding wavelength at the low end of the antenna operating band,and the directional gain is about 4.7 dBi.The antenna will have an important application prospect in the field of shortwave communication.
作者
谯丹
陈星
QIAO Dan;CHEN Xing(School of Electronic and Information Engineering,Sichuan University,Chengdu 610064,China)
出处
《无线电工程》
北大核心
2021年第5期382-385,共4页
Radio Engineering
基金
四川省重点研发项目(2019YFG0404)。
关键词
单极子天线
小型化
超宽带
短波天线
可调节
monopole antenna
miniaturization,ultra-wideband
shortwave antenna
adjustable
