论文名称：Ultra-Wideband Dual-Curved Conformal Phased Array Antenna with Low-Profile and Large-Curvature Antenna Element Utilizing Multi-Material 3D Printing for Volume-Limited Hemispherical Scan Coverage。

本文针对传统平面或单曲面相控阵天线波束覆盖范围有限（通常为±60°）的问题，提出了一种基于多材料3D打印工艺的超宽带双曲面共形相控阵天线。该天线采用蘑菇形结构抑制2×2子阵的边缘截断效应，将阻抗带宽扩展至8–26 GHz，同时具备低剖面和大曲率特性。通过优化正交极化偶极子的馈电方式并引入寄生贴片，有效抑制了辐射方向图畸变，实现了在有限体积内±90°的半球形波束覆盖。为验证所提出的设计方案，制造了由7个2×2子阵组成的14单元双极化阵列原型，并通过全波仿真与实验验证了其超宽带与广角扫描性能。实验结果表明，该天线在8–26 GHz频段内具有良好的阻抗匹配与辐射特性，适用于毫米波频段的一体化制造。

工作主要完成人：孙建旭，程钰间。

论文链接：https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11122397

Abstract—Planar-configured phased arrays with typical beam coverage of ±60° can’t meet the increasing demands for wider beam coverage, like the ±90° needed in low-altitude aerial vehicle applications. Existing dual-curved conformal array antennas also have limitations, such as narrow bandwidth or high profile. An ultra-wideband dual-curved conformal phased array antenna with the multi-material three-dimensional (3D) printing process is presented in this paper. A mushroom-shaped structure is designed to suppress edge truncation effect in 2×2 subarrays, expanding impedance bandwidth to 8−26 GHz. Modifying the feeding method of the orthogonally polarized dipoles and adding parasitic patches eliminate radiation pattern distortion. A 14-element dual-polarized array prototype is built, fabricated, and verified by full-wave simulations and experiments. It achieves a beam coverage range of ±90° (hemispherical scan coverage) in a limited volume. The antenna enables one piece manufacturing with a dual-curved conformal configuration, a low profile, and a large-curvature structure.

Index Terms—Ultra-wideband, dual-curved conformal, multi-material three-dimensional (3D) printing, volume-limited hemispherical scan coverage, phased array antenna, dipole, edge truncation effect suppression.