A Compact Dual-Band Dual-Mode Wearable Button Antenna for WBAN Applications.

Area of Science:

• Electrical Engineering
• Antenna Theory
• Wireless Communication

Background:

• Wireless Body Area Networks (WBANs) are crucial for remote health monitoring and wearable technology.
• Existing antennas often face limitations in terms of size, bandwidth, and dual-mode functionality for WBANs.

Purpose of the Study:

• To propose and validate a novel dual-band, dual-mode wearable button antenna for WBAN applications.
• To achieve compact size while enabling both omnidirectional (on-body) and directed (off-body) radiation patterns.

Main Methods:

• Integration of a monopole structure for low-frequency operation and a planar inverted-F antenna (PIFA) for high-frequency operation within a shared radiator.
• Incorporation of a parasitic structure to enhance bandwidth.
• Performance evaluation through numerical simulations and experimental measurements in free space and on-body environments.

Main Results:

• The antenna achieved a measured bandwidth of 300 MHz (2.3-2.6 GHz) in the low band and 4.5 GHz (5.5-10 GHz) in the high band on human tissue.
• Maximum radiation efficiencies of 76% (low band) and 93% (high band) were recorded.
• Peak gains of 2.5 dB (low band) and 6.9 dB (high band) were achieved on the human body.

Conclusions:

• The proposed wearable button antenna meets the design requirements for Industrial, Scientific, and Medical (ISM) band applications.
• The antenna demonstrates excellent performance, making it a promising solution for future WBAN systems.
• The dual-band, dual-mode design offers a compact and versatile option for wearable communication devices.