王浩同,屈世伟. 介质集成超宽带低剖面宽角扫描相控阵天线[J]. 电波科学学报,2023,38(3):376-381 + 392. DOI: 10.12265/j.cjors.2023103
      引用本文: 王浩同,屈世伟. 介质集成超宽带低剖面宽角扫描相控阵天线[J]. 电波科学学报,2023,38(3):376-381 + 392. DOI: 10.12265/j.cjors.2023103
      WANG H T, QU S W. Substrate-integrated ultra-wideband low-profile wide-scanning phased array antenna[J]. Chinese journal of radio science,2023,38(3):376-381 + 392. (in Chinese). DOI: 10.12265/j.cjors.2023103
      Citation: WANG H T, QU S W. Substrate-integrated ultra-wideband low-profile wide-scanning phased array antenna[J]. Chinese journal of radio science,2023,38(3):376-381 + 392. (in Chinese). DOI: 10.12265/j.cjors.2023103

      介质集成超宽带低剖面宽角扫描相控阵天线

      Substrate-integrated ultra-wideband low-profile wide-scanning phased array antenna

      • 摘要: 为满足现代多功能雷达系统对带宽、剖面高度以及扫描性能的需求,提出了一种工作在2~6 GHz的超宽带相控阵天线. 组成该天线阵列的单元由双极化的印刷偶极子贴片、不平衡馈电巴伦、基于超表面的宽角阻抗匹配层(wide-angle impedance matching layer, WAIM)以及金属地板组成. 偶极子末端带接地柱的圆形耦合贴片增加了单元间的耦合强度,提高了工作带宽;基于超表面的WAIM的引入在提升天线扫描能力的同时降低了天线的剖面;天线各个介质层中进行了周期性的打孔以抑制共模谐振和表面波. 仿真结果表明,该天线单元在2~6 GHz的工作频带内,E面±60°和H面±60°扫描时能够实现有源驻波小于2.3,正交端口间的隔离度优于20 dB. 利用多层印刷电路板工艺,对天线实物进行了加工和测试,测试结果与仿真结果具有较好的一致性. 该相控阵天线具有超宽带、低剖面、宽角扫描以及全介质集成的特点,为多功能雷达系统提供了一种新的天线结构.

         

        Abstract: To meet the requirements of bandwidth, profile and scanning performance for modern multifunctional radar systems, an ultra-wideband phased array antenna operating in 2−6 GHz is proposed in this paper. The array element consists of dual-polarized printed dipole patches, unbalanced feeding baluns, the wide-angle impedance matching layer based on metasurface (MS-WAIM) and a metal plate. The introduction of MS-WAIM layer not only improves the scanning performance, but also reduces profile. In addition, periodic square holes are cut in each dielectric layer to suppress common-mode resonance and surface waves. The simulated results indicate that the proposed element can achieve ±60° scanning in E/H-planes with an active voltage standing wave ratio (VSWR) below 2.3 and an isolation between orthogonal ports better than 20 dB within 2−6 GHz. To verify the validity of this design, a prototype is manufactured and measured by using multi-layer printed circuit board (PCB) technology, and the measured results are in good agreement with the simulated ones. This antenna has the characteristics of ultra wideband, low profile, wide-angle scanning coverage, and substrate-integration, providing a novel antenna structure for multifunctional radar systems.

         

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