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Updated: Jun 27, 2026
06:43
Effective Analysis of Human Exposure Conditions with Body-worn Dosimeters in the 2.4 GHz Band
Published on: May 2, 2018
Design and Analysis of a Smart Watch Antenna Operating in the 2.4 GHz Band
Łukasz Januszkiewicz1, Remigiusz Danych2, Maciej Łaski2
1Institute of Electronics, Faculty of Electrical, Electronic, Computer and Control Engineering, Lodz University of Technology, 90-924 Lodz, Poland.
Sensors (Basel, Switzerland)
|June 26, 2026
Summary
This study details a compact inverted-F antenna for 2.4 GHz smartwatches. It ensures reliable performance despite size constraints and body proximity, crucial for wearable device connectivity.
Area of Science:
- Electrical Engineering
- Electromagnetics
- Wearable Technology
Background:
- Miniaturized devices like smartwatches require compact antennas.
- Antenna performance in wearables is significantly affected by device components and user proximity.
- The 2.4 GHz band is critical for smartwatch communication.
Purpose of the Study:
- To design and validate an inverted-F antenna for smartwatch integration.
- To address challenges posed by limited space and nearby electronic components.
- To evaluate the impact of the human body on antenna performance.
Main Methods:
- Utilized the Finite-Difference Time-Domain (FDTD) method for numerical simulations.
- Incorporated a heterogeneous human body model to simulate real-world conditions.
- Designed and fabricated a prototype antenna for empirical testing.
Main Results:
- Achieved satisfactory impedance matching with Voltage Standing Wave Ratio (VSWR) below 1.5 across the band.
- Measured antenna gain of -1 dBi.
- Validated simulation results with measurements from the fabricated prototype.
Conclusions:
- The designed inverted-F antenna is suitable for integration into 2.4 GHz smartwatches.
- The antenna demonstrates robust performance considering miniaturization and human body interaction.
- The FDTD method with a detailed body model is effective for antenna design in wearables.
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