摘要
设计了一副改进的非对称平衡对拓Vivaldi天线。辐射贴片外边缘用3阶多项式曲线修正,以实现很宽的阻抗带宽。在天线口径处嵌入一个金属贴片作引向器以改善天线的辐射特性。对辐射贴片引入非对称性,使得E面波束偏离得到进一步补偿。实测结果表明,该天线具有极宽的工作带宽,在2~40 GHz内的增益大于0 dBi,且在15~30 GHz内的增益大于14 dBi;E面的波束偏离在6~40 GHz频率范围内小于3°。该天线具有结构简单、尺寸紧凑(44 mm×98 mm)以及方向图稳定等优点。该天线能够较好地应用于相控阵、超宽带系统等。
A modified asymmetric balanced antipodal Vivaldi antenna is designed. The outer edges of the radiation patches are modified by a 3- order polynomial curve to achieve an extremely large impedance bandwidth. A metal patch is inserted in the antenna aperture to enhance the radiation characteristics. The beam tilts in E - plane are further compensated by introducing structure asymmetry on radiation patches. The measured results show that the proposed antenna achieves a very wide bandwidth from 2 to more than 40 GHz with peak gain 〉0 dBi and 〉14 dBi over the 15 ×30 GHz frequency range. Moreover,the squinted beam of E-plane is less than 3√ from 6 to 40 GHz. The propos ed antenna ha s adv antages of simple st ruc- ture,compact size（44 mm×98 mm）,and stable radiation patterns. This antenna can be a good candidate for phased array, ultra-wideband（UWB） system and so on.
出处
《电讯技术》
北大核心
2018年第1期96-100,共5页
Telecommunication Engineering
基金
四川省乐山市科技局重点项目(16GZD028)
