一种双频多极化共口径波导天线阵列  

Novel dual-band multi-polarized shared-aperture waveguide antenna array

作　　者：鲁加国 张洪涛[2] 汪伟[2] 张冰[1] 尹应增 LU Jiaguo;ZHANG Hongtao;WANG Wei;ZHANG Bing;YIN Yingzeng(School of Electronic Engineering,Xidian University,Xi’an 710071,China;The 38th Research Institute of China Electronics Technology Corporation,Hefei 230088,China)

机构地区：[1]西安电子科技大学电子工程学院,陕西西安710071 [2]中国电子科技集团公司第三十八研究所,安徽合肥230088

出　　处：《西安电子科技大学学报》2022年第2期29-35,115,共8页Journal of Xidian University

基　　金：国家自然科学基金(61671416)。

摘　　要：针对雷达应用中共口径天线阵列的小型化问题,提出了一种实现双频多极化波导天线阵列的有效设计方法。该天线阵具有口径共用、低剖面、重量轻、辐射效率高等特点。该天线阵列由工作在L波段的线阵和C波段的双极化线性阵组成。L波段线阵为垂直极化矩形背腔缝隙天线,C波段双极化线阵为脊波导缝隙天线阵。L波段天线位于两个C波段垂直极化开槽波导之间,同时位于C波段水平极化波导下方。为了实现共口径天线阵列的小型化,在L波段矩形波导中引入了一种有效金属桥馈电设计。为了验证所提出设计的可行性,加工了一个工作在C波段的8×16天线阵列和工作在L波段的2×2天线阵列实物,并进行了测试。实验结果表明,在电压驻波比小于2的情况下,该天线阵在L波段的阻抗带宽约为12%,在C波段的阻抗带宽约为5.5%,天线辐射效率在85%以上。An efficient technique for realizing dual-band multi-polarized waveguide antenna array featuring in shared-aperture,low-profile,light-weight and high radiation efficiency is proposed.A rectangular cavity-backed slotted antenna is adopted to realize L-band vertical polarization,while the C-band horizontal and vertical polarization are realized by utilizing the ridged waveguide slotted antenna.The L-band antenna is located between two C-band vertical-polarized slotted waveguides and below a C-band horizontal-polarized waveguide.To achieve a more miniaturized volume of the shared-aperture antenna array,an efficient feeding design of a metal bridge is introduced into the L-band rectangular waveguide.In order to confirm the feasibility of the proposed design,an array prototype with 8×16 elements operating in the C-band and 2×2 elements operating in the L-band is fabricated and measured.Experimental results demonstrate that the proposed antenna array has a satisfactory impedance bandwidth of 12%in the L-band and that of 5.5%in the C-band with VSWR<2,and the antenna radiation efficiency of above 85%for both frequency bands.

关 键 词：背腔天线 双频天线 多极化天线 共口径天线 波导缝隙天线 

分 类 号：TN959.1[电子电信—信号与信息处理]