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Related Experiment Video

Updated: Oct 20, 2025

Effective Analysis of Human Exposure Conditions with Body-worn Dosimeters in the 2.4 GHz Band
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A Wearable Button Antenna Sensor for Dual-Mode Wireless Information and Power Transfer.

Jiahao Zhang1, Jin Meng1, Wei Li1

  • 1National Key Laboratory of Science and Technology on Vessel Integrated Power System, Wuhan 430033, China.

Sensors (Basel, Switzerland)
|September 10, 2021
PubMed
Summary

This study introduces a novel wearable button antenna sensor for simultaneous wireless information and power transfer (SWIPT). The device efficiently transmits data and harvests energy, paving the way for advanced wearable applications.

Keywords:
artificial magnetic conductorbutton antennascircularly polarized antennadual-band antennawearable sensorswireless power transfer

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Area of Science:

  • Wearable antenna design
  • Wireless power transfer
  • Biomedical sensors

Background:

  • Simultaneous wireless information and power transfer (SWIPT) is crucial for next-generation wearable devices.
  • Existing solutions often face challenges in efficiency and integration.
  • On-body communication and off-body energy harvesting require specialized antenna designs.

Purpose of the Study:

  • To propose a novel wearable button antenna sensor for SWIPT.
  • To optimize transfer efficiency for both information and power.
  • To validate the performance through prototyping and measurements.

Main Methods:

  • Design and simulation of a button antenna sensor with dual-band functionality.
  • Integration of an artificial magnetic conductor (AMC) for a low-profile and stable design.
  • Prototyping and experimental validation of the antenna sensor's performance.

Main Results:

  • Achieved omni-directional radiation in the 3.5 GHz WiMAX band for on-body communication.
  • Obtained circularly polarized broadside radiation in the 5 GHz WLAN band for power harvesting.
  • Demonstrated high radiation efficiency (>80%) and low specific absorption rate (SAR) below safety limits.

Conclusions:

  • The proposed wearable button antenna sensor effectively supports SWIPT.
  • The design offers efficient on-body information transmission and off-body energy harvesting.
  • The validated concept is suitable for advanced wearable technology integration.