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Nonlinear Electromagnetic Time Reversal in an Open Semireverberant System

Sun K. Hong1,*, Victor M. Mendez1, Trystan Koch2,3, Walter S. Wall1, and Steven M. Anlage2

  • 1Tactical Electronic Warfare Division, Naval Research Laboratory, Washington, D.C. 20375, USA
  • 2Department of Physics, University of Maryland, College Park, Maryland 20742, USA
  • 3Envisioneering, Inc., Alexandria, Virginia 22303, USA

  • *Corresponding author. sun.hong@nrl.navy.mil
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Phys. Rev. Applied 2, 044013 – Published 23 October, 2014

DOI: https://doi.org/10.1103/PhysRevApplied.2.044013

Abstract

We consider nonlinear electromagnetic time reversal (TR) applied to a semireverberant complex enclosure containing a discrete passive nonlinear circuit. Unlike closed reverberant systems used for the previous demonstrations of nonlinear electromagnetic TR, the experimental system used here better represents realistic environments that are often far more lossy. Moreover, we demonstrate the use of pulse inversion to extract nonlinear responses for electromagnetic time reversal, which could help overcome potential practical-implementation issues. Concentrating on the application of this technique as an efficient power-delivery method, we evaluate the peak power enhancement resulting from TR focusing at the location of the nonlinear circuit.

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Phys. Rev. Applied 2, 044013– Published 23 October, 2014
  • Received 21 May 2014

© 2014 American Physical Society

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