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目的:针对多源射频能量收集需求，设计一种宽带整流天线，通过宽带、高效整流器，实现复杂环境中多频段多极化射频能量的高效收集与转换。方法:采用三段式馈电和地面开槽技术优化收集天线的阻抗带宽，采用偏中心馈电技术和特殊的介质谐振器优化收集天线的轴比带宽；在具有初始频率选择性的整流器基础上，引入多种集总元件和微带线拓展的整流带宽。最终制作收集天线的实物样机，并验证整流天线系统的性能。结果:整流天线在2.2～4.9 GHz频带内保持50%以上的整流效率，其中在2.15～3.15 GHz以及3.8～4.8 GHz频带内具有圆极化特性。结论:实测结果与仿真预测结果基本一致。所提出的宽带圆极化整流天线能够在宽频带中高效地收集射频能量并完成整流，具有良好的应用前景。
Abstract：Aims: In response to the demand for multi-source RF energy harvesting, a broadband rectenna is designed to efficiently collect and convert multi-frequency, multi-polarization RF energy in complex environments through a broadband high-efficiency rectifier. Methods: A three-section feed structure and the ground slotting technique were employed to optimize the impedance bandwidth of the receiving antenna, while an off-center feed technique and a specially shaped dielectric resonator were used to enhance the axial ratio bandwidth. Based on a rectifier with initial frequency selectivity, various lumped components and microstrip line extensions were introduced to broaden the rectification bandwidth. Finally, a prototype of the receiving antenna was fabricated; and the performance of the rectenna system was experimentally verified. Results: The rectenna maintained a rectification efficiency above 50% within the 2.2～4.9 GHz frequency band and exhibited circular polarization characteristics in the 2.15～3.15 GHz and 3.8～4.8 GHz bands. Conclusions: The measured results are in good agreement with the simulation predictions. The proposed broadband circularly polarized rectenna can efficiently harvest RF energy and perform rectification over a wide frequency band, demonstrating promising application potential.
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基本信息:
DOI：
中图分类号:TN821.1
引用信息:
[1]金杭,郁国良,邱阳等.用于多源射频能量收集的宽带圆极化整流天线[J].中国计量大学学报,2025,36(02):210-218+280.
基金信息:
国家重点研发计划项目(No.2023YFF0616800)