| 杨文冬,成曦.可穿戴柔性环保混合可重构双频天线[J].电子测量与仪器学报,2026,40(5):261-271 |
| 可穿戴柔性环保混合可重构双频天线 |
| Wearable flexible eco-friendly hybrid reconfigurable dual-band antenna |
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| DOI： |
| 中文关键词: 可穿戴天线 柔性天线 频率可重构 方向图可重构 相纸基材 |
| 英文关键词:wearable antenna flexible antenna frequency reconfigurable pattern reconfigurable photopaper substrate |
| 基金项目:博士启动项目-可喷印电子墨水及其印刷光电/射频器件的研究（21-1039）项目资助 |
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| Author | Institution |
| Yang Wendong | 1.School of Electronic and Information Engineering, Liaoning Technical University, Huludao 125105, China;
2.Liaoning Key Laboratory of Radio Frequency and Big Data for Intelligent Applications, Huludao 125105, China |
| Cheng Xi | 1.School of Electronic and Information Engineering, Liaoning Technical University, Huludao 125105, China;3.School of Electronics and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China |
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| 中文摘要: |
| 针对当前可穿戴医疗设备对天线宽频带、多功能集成与生物兼容性等方面的迫切需求，设计了一款基于环保柔性纸基材的混合可重构双频天线。该天线选用相纸作为介质基板，结构尺寸为 22×25×0.27 mm3，兼具优良的柔韧性与轻量化特性。通过枝节加载技术实现双频特性，并集成PIN二极管作为射频开关，调节其通断状态以改变电流路径，从而实现频率和辐射方向图的4种可重构工作模式，具体包括两种双频定向辐射模式、一种低频全向辐射模式及一种高频全向辐射模式。采用丝网印刷银浆技术在相纸基板上制备天线结构，并结合偏置电路模块集成PIN二极管控制单元，完成天线实物的制作。测试结果表明，该天线在2.4和5.8 GHz频段均可工作于双频或单频模式，各模式下-10 dB 阻抗带宽均大于 20%，峰值增益稳定在3 dBi左右，辐射效率高于 60%。在曲率半径为20 mm的弯曲状态下及人体组织模型加载条件下，天线仍保持良好的阻抗匹配与辐射性能，展现出良好的结构鲁棒性与佩戴适应性。比吸收率在2.5与6 GHz时分别为1.145与1.312 W/kg，均低于国际安全限值，满足可穿戴设备对人体的电磁安全要求。环保材料、紧凑结构与混合可重构能力的有机结合，使得该天线在短期医疗监测与体域通信等可穿戴系统中具备良好的实用潜力。 |
| 英文摘要: |
| In response to the pressing demands of current wearable medical devices for wide bandwidth, multi-functional integration, and biocompatibility, this paper presents the design of a hybrid reconfigurable dual-band antenna based on an eco-friendly flexible paper substrate. The proposed antenna employs photo paper as the dielectric substrate, with compact dimensions of
22×25×0.27 mm3, offering excellent flexibility and lightweight characteristics. Dual-band operation is achieved through stub-loading techniques, while integrated PIN diodes function as RF switches. By controlling their ON/OFF states to alter the current paths, the antenna achieves four reconfigurable operating modes in both frequency and radiation pattern: specifically, two dual-band directional radiation modes, one low-frequency omnidirectional radiation mode, and one high-frequency omnidirectional radiation mode. The antenna structure was fabricated on the photo paper substrate using the screen-printing technique with silver paste, and the prototype was completed by integrating PIN diode control units via a bias circuit module. The measured results demonstrate that the antenna operates effectively in either dual-band or single-band modes across the 2.4 and 5.8 GHz bands. Across all modes, the -10 dB impedance bandwidth exceeds 20%, the peak gain remains stable at approximately 3 dBi, and the radiation efficiency is above 60%. Under bending conditions with a curvature radius of 20 mm and when loaded with a human tissue model, the antenna maintains stable impedance matching and radiation performance, demonstrating good structural robustness and wearability. The specific absorption rate (SAR) values are 1.145 W/kg at 2.5 GHz and 1.312 W/kg at 6 GHz, both complying with international safety standards and meeting the electromagnetic safety requirements for wearable devices used on the human body. The combination of eco-friendly materials, a compact structure, and hybrid reconfigurability endows the proposed antenna with significant potential for practical applications in short-term medical monitoring and body area communication wearable systems. |
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