Ultra-Broadband Wearable Antenna with Thermal Sensitivity Based on Surface-Modified TiO₂-PTFE-PDMS Nanocomposites.

IF 3 3区工程技术 Q2 CHEMISTRY, ANALYTICAL

Micromachines Pub Date : 2025-05-27 DOI:10.3390/mi16060629

Baoli Mi, Qingya Meng, Junping Duan, Bowen Su, Ma Jian, Yangyi Shi, Binzhen Zhang

{"title":"Ultra-Broadband Wearable Antenna with Thermal Sensitivity Based on Surface-Modified TiO2-PTFE-PDMS Nanocomposites.","authors":"Baoli Mi, Qingya Meng, Junping Duan, Bowen Su, Ma Jian, Yangyi Shi, Binzhen Zhang","doi":"10.3390/mi16060629","DOIUrl":null,"url":null,"abstract":"In this study, a composite substrate with adjustable dielectric properties was prepared, and its promising application in wearable medical device antennas was demonstrated. 3-Methacryloxypropyltrimethoxysilane (KH570) was used to modify titanium dioxide (TiO2) nano-powder, and the modified powder was blended with a mixture of polydimethylsiloxane (PDMS) and polytetrafluoroethylene (PTFE) under the action of anhydrous ethanol. The resulting polymer material had the advantages of hydrophobicity, softness, low loss, and a high dielectric constant. Meanwhile, the effects of the KH570 mass fraction on the microstructure and dielectric properties of TiO2-PTFE-PDMS composites were investigated, and the results showed that when the mass fraction was 5%, the composites exhibited better dielectric properties in the range of 2-12 GHz. Finally, an ultra-wideband antenna with an operating frequency band in the range of 2.37-11.66 GHz was prepared based on this composite substrate. The antenna demonstrated significant potential for future applications in detecting environmental thermal changes due to its special temperature-sensitive linear frequency shift characteristics, and its effect on the human body under bending conditions was studied. In addition, specific absorption rate (SAR) measurements were performed to assess the effects of antenna radiation on the human body in practical applications.","PeriodicalId":18508,"journal":{"name":"Micromachines","volume":"16 6","pages":""},"PeriodicalIF":3.0000,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12195483/pdf/","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Micromachines","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.3390/mi16060629","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, ANALYTICAL","Score":null,"Total":0}

引用次数: 0

Abstract

In this study, a composite substrate with adjustable dielectric properties was prepared, and its promising application in wearable medical device antennas was demonstrated. 3-Methacryloxypropyltrimethoxysilane (KH570) was used to modify titanium dioxide (TiO₂) nano-powder, and the modified powder was blended with a mixture of polydimethylsiloxane (PDMS) and polytetrafluoroethylene (PTFE) under the action of anhydrous ethanol. The resulting polymer material had the advantages of hydrophobicity, softness, low loss, and a high dielectric constant. Meanwhile, the effects of the KH570 mass fraction on the microstructure and dielectric properties of TiO₂-PTFE-PDMS composites were investigated, and the results showed that when the mass fraction was 5%, the composites exhibited better dielectric properties in the range of 2-12 GHz. Finally, an ultra-wideband antenna with an operating frequency band in the range of 2.37-11.66 GHz was prepared based on this composite substrate. The antenna demonstrated significant potential for future applications in detecting environmental thermal changes due to its special temperature-sensitive linear frequency shift characteristics, and its effect on the human body under bending conditions was studied. In addition, specific absorption rate (SAR) measurements were performed to assess the effects of antenna radiation on the human body in practical applications.

查看原文本刊更多论文

基于表面改性TiO2-PTFE-PDMS纳米复合材料的热敏超宽带可穿戴天线。

本研究制备了具有可调介电性能的复合衬底，并展示了其在可穿戴医疗设备天线中的应用前景。采用3-甲基丙烯氧基丙基三甲氧基硅烷（KH570）对二氧化钛（TiO2）纳米粉体进行改性，并将改性后的粉体与聚二甲基硅氧烷（PDMS）和聚四氟乙烯（PTFE）的混合物在无水乙醇的作用下进行共混。所得聚合物材料具有疏水、柔软、低损耗和高介电常数等优点。同时，研究了KH570质量分数对TiO2-PTFE-PDMS复合材料微观结构和介电性能的影响，结果表明：当KH570质量分数为5%时，复合材料在2-12 GHz范围内具有较好的介电性能。最后，基于该复合衬底制备了工作频带为2.37 ~ 11.66 GHz的超宽带天线。该天线具有特殊的温度敏感线性频移特性，在检测环境热变化方面具有重要的应用潜力，并研究了其在弯曲条件下对人体的影响。此外，还进行了特定吸收率（SAR）测量，以评估天线辐射在实际应用中对人体的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Micromachines NANOSCIENCE & NANOTECHNOLOGY-INSTRUMENTS & INSTRUMENTATION

CiteScore

5.20

自引率

14.70%

发文量

1862

审稿时长

16.31 days

期刊介绍： Micromachines (ISSN 2072-666X) is an international, peer-reviewed open access journal which provides an advanced forum for studies related to micro-scaled machines and micromachinery. It publishes reviews, regular research papers and short communications. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced.