Design of Low-SAR and High On-Body Efficiency Tri-Band Smartwatch Antenna Utilizing the Theory of Characteristic Modes of Composite PEC-Lossy Dielectric Structures

被引：9

作者：

Zhang, Huan Huan ^{[1
]}

Gong, Li Feng ^{[1
]}

Liu, Xin Zhi ^{[1
]}

Xu, Yun Xue ^{[1
]}

Cheng, Guang Shang ^{[2
]}

Liu, Ying ^{[1
]}

Shi, Guang Ming ^{[3
]}

Zheng, Chao ^{[4
]}

Han, Yong Jian ^{[4
]}

机构：

[1] Xidian Univ, Natl Key Lab Antennas & Microwave Technol, Xian 710071, Peoples R China

[2] Anhui Univ, Key Lab Intelligent Comp & Signal Proc, Minist Educ, Hefei 230601, Peoples R China

[3] Xidian Univ, Sch Artificial Intelligence, Xian 710071, Peoples R China

[4] Vivo Mobile Commun Co Ltd, Dongguan 523875, Peoples R China

来源：

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION | 2023年 / 71卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Antennas; Wearable Health Monitoring Systems; Antenna measurements; Couplings; Dielectric losses; Metals; Wireless LAN; Characteristic modes; low specific absorption rate (SAR); on-body efficiency; smartwatch antenna; INTEGRAL-EQUATION FORMULATIONS; MIMO ANTENNA; SURFACE;

D O I：

10.1109/TAP.2022.3222637

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A low specific absorption rate (SAR) and high on-body efficiency tri-band smartwatch antenna is designed utilizing the theory of characteristic modes (TCM) of composite perfect electric conductors and lossy dielectric structures. The antenna works in the GPS frequency band, WLAN 2.4 GHz/Bluetooth frequency band, and 5G frequency band. After analyzing the characteristic modes of the antenna and human body in the above three frequency bands, the characteristic modes with small modal coupling coefficients (MCCs) are selected and excited. Due to the small mutual coupling between the antenna and the human body, the proposed antenna has good performance on both SAR and on-body efficiency. Its measured 10 g average body SAR is lower than 1.3 W/kg. When it is placed 0 mm above the body, its on-body efficiency is 9.3%-9.88% in the GPS frequency band, 12%-14.2% in the WLAN 2.4 GHz/Bluetooth frequency band, and 17.3%-20.1% in the 5G frequency band.

引用

页码：1913 / 1918

页数：6

共 1 条

[1] Low-SAR Four-Antenna MIMO Array for 5G Mobile Phones Based on the Theory of Characteristic Modes of Composite PEC-Lossy Dielectric Structures
Zhang, Huan Huan
Liu, Xin Zhi
Cheng, Guang Shang
Liu, Ying
Shi, Guang Ming
Li, Kun
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, 2022, 70 (03) : 1623 - 1631

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