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Flexible Antenna with Circular/Linear Polarization for Wideband Biomedical Wireless Communication
Mohammed E Yassin1, Khaled F A Hussein2, Qammer H Abbasi3
1Electronics and Communications Engineering Department, Akhbar Elyom Academy, 6th of October City 12573, Egypt.
Sensors (Basel, Switzerland)
|July 8, 2023
Summary
This study introduces a flexible G-shaped antenna for biomedical communication, offering dual-mode polarization for off-body and on-body devices. It achieves wideband impedance matching and circular polarization for reliable wireless data transfer.
Area of Science:
- Electromagnetics and Antennas
- Biomedical Engineering
- Wireless Communication Systems
Background:
- Off-body and on-body communication systems require antennas with specific polarization and wide bandwidth capabilities.
- Existing antenna designs may not meet the dual-mode polarization requirements for diverse biomedical applications.
- Flexible antennas are crucial for wearable and implantable biomedical devices.
Purpose of the Study:
- To propose and investigate a novel wideband, low-profile G-shaped flexible antenna for biomedical communication.
- To achieve dual-mode polarization: circular polarization (CP) for WiMAX/WLAN and linear polarization for on-body biosensors.
- To optimize antenna performance for impedance matching, axial ratio bandwidth, radiation efficiency, and gain.
Main Methods:
- Design of a G-shaped and inverted G-shaped radiating strip on a flexible substrate.
- Feeding mechanism using a co-planar waveguide (CPW) for single-face fabrication.
- Performance investigation through electromagnetic simulations and experimental measurements.
Main Results:
- Achieved 18% 3dB-Axial Ratio (AR) bandwidth for circular polarization in the 5-6 GHz range (WiMAX/WLAN).
- Demonstrated 117% impedance matching bandwidth from 5-19 GHz for on-body biosensor communication.
- Attained a maximum gain of 5.37 dBi and a radiation efficiency of 98% with compact dimensions (25 × 27 × 0.13 mm³).
Conclusions:
- The proposed G-shaped flexible antenna effectively supports dual-mode polarization for versatile biomedical communication.
- The antenna's wideband impedance matching and CP performance enable reliable off-body and on-body wireless links.
- The design offers a promising solution for next-generation wearable and implantable biomedical systems.
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