A Compact Textile Penta-Band Wearable Antenna Using Multimode Patch and Multiresonant Feeding for Off-Body Communications

IF 4.8 2区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Antennas and Wireless Propagation Letters Pub Date : 2026-04-01 Epub Date: 2026-02-16 DOI:10.1109/LAWP.2026.3665513

Ziang Xu;Xiang Gao;Wenfei Tang;Kun Guo;Xiangyuan Bu;Jianping An

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Abstract

This letter presents a compact textile penta-band wearable antenna for off-body communications. To resolve the challenge of implementing multiband operation with consistent polarization within a limited volume, the proposed antenna design combines the techniques of multimode resonant patch and multiresonant feeding. The upper radiating patch integrates a modified U-slot for enabling tri-band multimode resonance, while the middle-layer T-shaped feeding structure is loaded with two shorting pins and a notched square ring thus contributing two additional resonant bands via mode splitting. The antenna achieves a measured fractional operating bandwidth of 2.0%, 5.9%, 5.3%, 3.1% and 2.0% at 1.13 GHz, 1.62 GHz, 2.06 GHz, 2.62 GHz, and 2.88 GHz with |S₁₁| < −10 dB, respectively. Far-field measurement results confirm identical polarization modes and stable broadside radiation patterns across all bands. On-body evaluations reveal that the specific absorption rate values are below 0.4 W/kg with the input power of 1 W, complying well with the safety limit. This antenna shall be very attractive for off-body communications.

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一种用于离体通信的多模贴片和多谐振馈电的紧凑型纺织五波段可穿戴天线

这封信介绍了一种紧凑的纺织五波段可穿戴天线，用于离体通信。为了解决在有限体积内实现一致极化的多频段工作的挑战，该天线设计结合了多模谐振贴片和多谐振馈电技术。上面的辐射贴片集成了一个改进的u型槽，用于实现三波段多模共振，而中间层t形馈电结构加载了两个短针和一个陷波方形环，从而通过模式分裂提供了两个额外的谐振带。该天线在1.13 GHz、1.62 GHz、2.06 GHz、2.62 GHz和2.88 GHz频段的实测分数工作带宽分别为2.0%、5.9%、5.3%、3.1%和2.0%,|S11| <−10 dB。远场测量结果证实所有波段的偏振模式相同，宽侧辐射模式稳定。体上评价表明，在输入功率为1 W的情况下，比吸收率值低于0.4 W/kg，完全符合安全限值。这种天线对离体通信很有吸引力。

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来源期刊

IEEE Antennas and Wireless Propagation Letters 工程技术-电信学

CiteScore

8.00

自引率

9.50%

发文量

529

审稿时长

1.0 months

期刊介绍： IEEE Antennas and Wireless Propagation Letters (AWP Letters) is devoted to the rapid electronic publication of short manuscripts in the technical areas of Antennas and Wireless Propagation. These are areas of competence for the IEEE Antennas and Propagation Society (AP-S). AWPL aims to be one of the "fastest" journals among IEEE publications. This means that for papers that are eventually accepted, it is intended that an author may expect his or her paper to appear in IEEE Xplore, on average, around two months after submission.