New Results in Chaotic Time-Reversed Electromagnetics: High Frequency One-Recording-Channel Time-Reversal Mirror

S.M. Anlagea,b,c, J. Rodgersd, S. Hemmadya,b,c,e, J. Hartb,d, T.M. Antonsenb,c,d and E. Ottb,c,d a Center for Nanophysics and Advanced Materials, Physics Department, University of Maryland, College Park, MD 20742-4111, USA b Physics Department, University of Maryland, College Park, MD 20742-4111, USA c Department of Electrical and Computer Engineering, University of Maryland, College Park, MD 20742, USA dInstitute for Research in Electronics and Applied Physics, University of Maryland, College Park, MD 20742-3511, USA eMalibu Research Associates Inc., 3760A Calle Tecate, Camarillo CA 93012-5059, USA

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Received: 25 05 2007;

We experimentally demonstrate a new electromagnetic one-recording-channel time-reversal mirror that can operate at high frequencies and high bandwidths. The experiments are carried out in a 1 m3 ray-chaotic enclosure using two simple antennas. The input is a 7.0 GHz signal that is amplitude modulated with a 60 ns long pulse. The time-reversal focused signal has a peak-signal-to-noise ratio of about 9 dB, and is very sensitive to small perturbations to the ray-chaotic enclosure. The results are consistent with expectations for single-recording-channel time-reversal mirrors, and establish a new platform for study of fundamental issues in time-domain wave chaos, as well as novel applications.

DOI: 10.12693/APhysPolA.112.569 PACS numbers: 03.50.De, 05.45.Mt, 41.20.Jb, 42.65.Hw