全介质陶瓷3D打印毫米波单向漏波天线
All-Dielectric Ceramic 3-D Printed Unidirectional Leaky-Wave Antenna at mm-Wave Frequencies
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- RWTH Aachen University（亚琛工业大学）
- University of Duisburg-Essen（杜伊斯堡-埃森大学）
- Fraunhofer Institute for High Frequency Physics and Radar Techniques (FHR)（弗劳恩霍夫高频物理与雷达技术研究所）
机构由 AI 辅助整理，请以论文原文为准。
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中文总结 AI 辅助
本研究设计并制造了一种无需金属接地平面的全介质陶瓷3D打印漏波天线，工作于70-90 GHz，利用光子带隙理论实现宽边单向辐射，扫描范围-18°至22°，增益超23 dBi，辐射单向性超85%。
中文摘要 AI 辅助
设计并制造了一种全介质漏波天线，该天线无需金属接地平面即可在宽边方向单向辐射。其工作频率范围为70-90 GHz，设计宽边频率为77 GHz。设计过程利用光子带隙理论，将-1次谐波定位在第二布拉格条件点的宽边频率上。随后对结构进行修改以闭合带隙，同时保证最大总场耦合到相关辐射谐波，确保辐射的单向性。该天线采用Al2O3陶瓷打印工艺制造，展示了其制造复杂低损耗高频结构的潜力。仿真与测量结果吻合良好，主要偏差为1 GHz的频率偏移，该偏移可在仿真中复现。天线原型显示扫描范围为-18°至22°，增益值超过23 dBi。超过85%的辐射功率在宽边方向单向辐射，仿真显示有望达到98%。
英文摘要
An all-dielectric leaky-wave antenna, radiating unidirectionally at broadside without the use of a metallic ground plane, is designed and manufactured. It operates in the 70-90 GHz frequency range with a design broadside frequency of 77 GHz. The design process makes use of the theory of photonic bandgaps to position a -1 harmonic at the broadside frequency on the second Bragg-condition point. The structure is then modified to close the bandgap and to simultaneously guarantee maximum total field coupling to the relevant radiating harmonic, ensuring radiation unidirectionality. The antenna is manufactured with an Al2O3 ceramic printing process, demonstrating its manufacturing potential for complex low-loss high-frequency structures. Simulations agree well with measurements, with the main deviation being a 1 GHz frequency shift that could be reproduced in simulation. The antenna prototype shows a scanning range of -18°-22° and gain values above 23 dBi. More than 85 % of the radiation power is radiated unidirectionally at broadside, with simulations showing potential to attain 98 %.
