摘要
设计了一种新型单层结构的超宽带双极化平面交叉偶极子天线。该天线采用2对方环偶极子正交排布实现双线极化,在方环偶极子内部加载枝节,外部加载寄生方环,引入新谐振点,大幅度扩展了天线带宽;天线结构紧凑,尺寸仅为0.25λL×0.25λL(λL为低频截止频率对应的空间自由波长)。设计和加工制作了一件工作于甚高频(VHF)频段的天线样品,测试结果表明,该天线能够在55~155 MHz实现电压驻波比(VSWR)<2.5,阻抗带宽达到96%,同时天线在整个工作频带呈现良好的定向辐射特性,增益大于7 dB。
A novel ultra-wideband dual-polarized planar cross-dipole antenna with single-layer structure is designed.The antenna utilizes two cross loop dipoles to achieve dual linear orthogonal polarization.The stubs inside the dipoles,parasitic square loops outside the dipoles and new resonance points significantly enlarge the impedance bandwidth.The proposed antenna has compact structure with the size only 0.25λL×0.25λL,whereλL is the wavelength corresponding to the lowest frequency within the whole working frequency band.As a sample,a Very High Frequency(VHF)antenna is designed,fabricated and measured.The measured results show that the antenna can achieve Voltage Standing Wave Ratio(VSWR)<2.5 at 55-155 MHz,and the impedance bandwidth reaches 96%.The antenna has good directional radiation patterns in the whole working frequency band,and the gain is above 7 dB.
作者
李杰
陈星
LI Jie;CHEN Xing(School of Electronic and Information Engineering,Sichuan University,Chengdu Sichuan 610064,China)
出处
《太赫兹科学与电子信息学报》
北大核心
2019年第4期632-635,共4页
Journal of Terahertz Science and Electronic Information Technology
基金
装备预研教育部联合基金资助项目(6141A02022519)
关键词
交叉偶极子天线
宽带
双极化
紧凑
cross-dipole antenna
ultra-wideband
dual-polarized
compactness
