A Novel Flexible Antenna at Very High Frequency Band for On-Body Applications

• 作者: Abhishek Kandwal Huajie Tang Pengfei Ao Kun Wang Jingzhen Li Yuhang Liu Tobore Igbe Zedong Nie
• 来源期刊: 北京理工大学学报（英文版）
• 年，卷（期）: 2022,（1）
• 页码范围: 81-90
• 页数: 10页
• 语种: 英文
• DOI: 10.15918/j.jbit1004-0579.2021.077

摘要

This paper proposes a novel flexible antenna design operating at very high frequency (VHF) band for on-body applications such as human body communication (HBC). The antenna consists of back-to-back E-shaped fractal and complimentary structures designed over a thin flex-ible substrate. The overall design working on the principle of fractal geometries and capacitive coupling is highly beneficial to achieve better antenna characteristics even at low frequencies around 35 MHz–45 MHz that are being used for HBC application. The proposed antenna obtained a large bandwidth of around 10.0 MHz in air and a bandwidth of around 8.0 MHz during on-body opera-tion. The antenna has been tested in three different scenarios viz. air, on-body single antenna and on-body communication using two antennas. The insertion loss is reduced to a minimum in all three scenarios, which is quite beneficial for better signal transmission. The size miniaturization with high flexibility in such low frequencies has also been achieved in the paper that makes the proposed design suitable for human body communication applications.