Monolithic integration of 3-D printed gradient index (GRIN) dielectric loading with a double-ridged rectangular horn standard gain horn (SGH) and its impact on antenna performance are demonstrated. Results show that the GRIN loaded horns improve sidelobe levels (SLLs) and beam symmetry, while maintaining good impedance match and relatively high radiation efficiency over more than an octave bandwidth from 7.5 to 18 GHz. Moreover, they have low weight and show good robustness to fabrication imperfections. This work paves the way for seamless integration of complex wideband antennas in 3-D printed systems such as unmanned aerial vehicles (UAVs).

中文翻译：

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3D 打印单片 GRIN 介电负载双脊喇叭天线

演示了 3-D 打印梯度指数 (GRIN) 介电负载与双脊矩形喇叭标准增益喇叭 (SGH) 的单片集成及其对天线性能的影响。结果表明，加载 GRIN 的喇叭提高了旁瓣电平 (SLL) 和波束对称性，同时在 7.5 至 18 GHz 的倍频程带宽内保持了良好的阻抗匹配和相对较高的辐射效率。此外，它们重量轻，对制造缺陷表现出良好的鲁棒性。这项工作为将复杂的宽带天线无缝集成到无人机 (UAV) 等 3D 打印系统铺平了道路。