Magnetic communication by polarization helicity modulation using atomic magnetometers

Area of Science:

• Physics
• Electrical Engineering
• Quantum Sensing

Background:

• Radio frequency (RF) telecommunication faces significant challenges in kilohertz range transmission through conductive media due to signal reflection and absorption.
• Existing communication protocols struggle to penetrate electrically conductive barriers effectively, limiting applications in submerged or underground environments.

Purpose of the Study:

• To present a novel miniature magnetic quantum receiver designed for radio frequency telecommunication.
• To demonstrate a new communication protocol utilizing the polarization helicity of magnetic fields to circumvent signal impediments.
• To enable efficient data transmission through electrically conductive mediums.

Main Methods:

• Development of a miniature magnetic quantum receiver employing two optically pumped atomic magnetometers.
• Simultaneous discrimination of two magnetic field polarization helicities.
• Testing of the receiver's performance in an unshielded environment.

Main Results:

• Successful demodulation of a 2 kHz carrier frequency signal at a data rate of 500 bits/s.
• Demonstration of efficient communication through a conductive barrier.
• Operation in an unshielded environment, highlighting robustness.

Conclusions:

• The developed magnetic quantum receiver offers a promising solution for radio frequency communication through conductive barriers.
• Modulating magnetic field polarization helicity provides a viable alternative protocol for overcoming signal loss.
• This technology paves the way for enhanced communication in challenging environments.