一种对拓式超宽带高增益Vivaldi天线设计  

Design of an Antipode-type Ultra-wideband High-gain Vivaldi Antenna

作　　者：赵刘易斯 王友保[1] 唐佑铭 马君鑫 ZHAO LIU-yisi;WANG You-bao;TANG You-ming;MA Jun-xin(School of Electronics and Information Engineer,Nanjing University of Information Science&Technology,Nanjing 210044,China)

机构地区：[1]南京信息工程大学电子与信息工程学院,江苏南京210044

出　　处：《中国电子科学研究院学报》2023年第9期840-846,853,共8页Journal of China Academy of Electronics and Information Technology

基　　金：国家自然科学基金资助项目(61673222)。

摘　　要：文中设计了一款结构新颖的对拓式超宽带高增益的Vivaldi天线。该天线在基板两侧引入平衡辐射臂并用通孔将它们联结起来,使天线增加了低频带宽、降低了交叉极化、减小了尺寸;在不影响带宽的前提下,通过在天线首部和尾部分别添加介质引向器和反射地板,使天线的增益得到了提高。天线测试结果表明该天线的带宽在2 GHz~20 GHz内反射系数均低于-10 dB,且天线增益最高为12.8 dBi,同时在带宽范围内,保持了良好的方向图对称性和低交叉极化水平。A novel antipode-type ultra-wideband and high-gain Vivaldi antenna is proposed in this paper.Balance-arms on both sides of the substrate are introduced to increases the low-frequency bandwidth and reduces the cross polarization.Meanwhile,the Balance-arms and the Main-arms are connected with vias to reduce the dimensions of the antenna.Without affecting the bandwidth,the gain of the antenna is improved by adding a dielectric guide and a reflecting floor at the head and tail of the antenna,respectively.The measurement results show that the reflection coefficient of the proposed antenna is lower than-10 dB in the range of 2 GHz~20 GHz,and the maximum gain of the antenna is 12.8 dBi.At the same time,the proposed antenna maintains good pattern symmetry and low cross-polarization level in the bandwidth range.

关 键 词：端射天线 超宽带 VIVALDI天线 高增益 

分 类 号：TN822[电子电信—信息与通信工程]