Flexible and Small Textile Antenna for UWB Wireless Body Area Network

Area of Science:

• Electrical Engineering
• Electromagnetics
• Wearable Technology

Background:

• Wireless Body Area Networks (WBAN) require compact, efficient antennas.
• Miniaturized antennas often face challenges with bandwidth and radiation efficiency.
• Textile-based antennas offer flexibility and integration potential for wearable applications.

Purpose of the Study:

• To propose a miniaturized textile microstrip antenna for WBAN applications.
• To enhance antenna performance, including impedance bandwidth and radiation patterns.
• To ensure the antenna meets safety regulations for wearable devices.

Main Methods:

• Designed a monopole antenna using a denim substrate for reduced surface wave losses.
• Incorporated a modified circular radiation patch and an asymmetric defected ground structure.
• Simulated and measured antenna performance, including impedance bandwidth, gain, and Specific Absorption Rate (SAR).

Main Results:

• Achieved an ultra-wideband (UWB) impedance bandwidth of 110% (2.85-9.81 GHz).
• Obtained a peak gain of 3.28 dBi at 6 GHz.
• Demonstrated SAR values compliant with FCC guidelines at 4/6/8 GHz.

Conclusions:

• The proposed miniaturized textile antenna exhibits excellent performance for WBAN.
• The antenna's small size (20 × 30 × 1.4 mm³) and reduced size (62.5%) are significant advantages.
• The antenna is suitable for integration into wearable devices like peaked caps for indoor positioning systems.