High-Contrast Low-Loss Antenna: A Novel Antenna for Efficient Into-Body Radiation

Area of Science:

• Biomedical Engineering
• Electromagnetics
• Materials Science

Background:

• Efficient wireless communication within biological tissues is crucial for advanced medical devices.
• Existing antennas face challenges with signal loss and biocompatibility for in-body applications.

Purpose of the Study:

• To develop and characterize a novel biocompatible high-contrast low-loss antenna (HCLA) for efficient into-body radiation.
• To improve antenna performance for medical telemetry, sensing, and imaging applications.

Main Methods:

• Design of a quasi-bowtie antenna loaded with a high-contrast, low-loss dielectric.
• Fabrication using stable, biocompatible materials.
• Performance evaluation through simulations and measurements across a 1-5 GHz bandwidth.

Main Results:

• The HCLA demonstrated a 5.72 dB improvement in transmission loss at 2.4 GHz compared to previous state-of-the-art.
• Simulations showed up to a ~12.5 dB improvement in transmission loss at higher frequencies.
• Wearable antenna achieved compact size (2.62 cm³) and operated efficiently across the 1-5 GHz bandwidth.

Conclusions:

• The HCLA offers superior into-body radiation efficiency and reduced transmission loss.
• Biocompatible and low-loss materials ensure reliable and repeatable performance for real-world medical applications.
• The developed antenna addresses key limitations in current medical telemetry and sensing technologies.