Researchers produce synthetic Hall Effect to achieve one-way radio transmission

EurekAlert  September 12, 2019
Researchers at the University of Illinois have developed a method to directionally control data transmission using a principle similar to the Hall Effect. They generated a “current of light” by creating synthetic electric and magnetic fields, which affect light the same way the normal fields affect electrons. The synthetic fields are created by varying the structure that light propagates through both in space and time. By creating a specially designed circuit to enhance the interaction between the synthetic fields and radio waves, the team leveraged the principle of the Hall Effect to boost radio signals going in one direction, while stopping and absorbing signals going in the other direction. Their experiments showed that signals can be transmitted through the circuit more than 1000-times as effectively in one direction than in the opposite direction. The research could be used to protect sources of radio waves from potentially harmful interference and ensure sensitive quantum mechanical measurements are accurate. They are working to extend the concept to other kinds of waves, including light and mechanical vibrations…read more. TECHNICAL ARTICLE

This is a microstrip circuit used to demonstrate Hall Effect for radio waves. Credit: University of Illinois

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