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Low specific absorption rate and gain‐enhanced meandered bowtie antenna utilizing flexible dipole‐like artificial magnetic conductor for medical application at 2.4 GHz
Microwave and Optical Technology Letters ( IF 1.0 ) Pub Date : 2020-07-09 , DOI: 10.1002/mop.32507
Nazirah Othman 1 , Noor Asmawati Samsuri 2 , Mohamad Kamal A. Rahim 2 , Kamilia Kamardin 3, 4
Affiliation  

A flexible meander bowtie antenna incorporated with dipole‐like artificial magnetic conductor (AMC) is proposed. Two different types of AMC design are presented for comparison. A new medical transdermal patch is used as the dielectric substrate for both antenna and AMC. The gain enhancement is achieved using a modified dipole‐like unit cell of the AMC. The effect of the substrate thickness and separation distance between the antenna and the AMC is investigated. The results show that the antenna is operating at its original frequency (as in free space) when the antenna‐AMC separation distance is more than one‐eighth of the wavelength. The directive radiation pattern with high gain is obtained when the flexible antenna is placed above the AMC structure. The AMC increases the antenna's gain by 4.15 and 4.931 dB for single‐dipole AMC and double‐dipole AMC, respectively. The 10 g specific absorption rate is reduced by 98% and 68% for both simulated and measured results, respectively. The results demonstrate that the proposed flexible antenna‐AMC is suitable for on‐body application specifically for continuous health monitoring.

中文翻译:

低挠曲率和增益增强的曲折领结天线,采用柔性偶极子状人造磁导体,可用于2.4 GHz的医疗应用

提出了一种柔性的曲折领结天线,并结合了偶极子状的人造磁导体(AMC)。提出了两种不同类型的AMC设计进行比较。一种新的医用透皮贴片被用作天线和AMC的介电基质。使用AMC的改良偶极子型像元可实现增益增强。研究了基板厚度和天线与AMC之间间隔距离的影响。结果表明,当天线与AMC的分离距离大于波长的八分之一时,天线将以其原始频率工作(如在自由空间中)。当将柔性天线放置在AMC结构上方时,可以获得具有高增益的定向辐射方向图。AMC将天线的增益提高了4.15和4。单偶极AMC和双偶极AMC分别为931 dB。模拟结果和测量结果的10 g比吸收率分别降低了98%和68%。结果表明,所提出的柔性天线-AMC特别适合用于持续健康监测的人体应用。
更新日期:2020-07-09
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