Time reversal of wideband microwaves
- 10 April 2006
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 88 (15) , 154101
Abstract
In this letter, time reversal is applied to wideband electromagnetic waves in a reverberant room. To that end a multiantenna time reversal mirror (TRM) has been built. A 150MHz bandwidth pulse at a central frequency of 2.45GHz is radiated by a monopolar antenna, spread in time due to reverberation, recorded at the TRM, time reversed, and retransmitted. The time-reversed wave converges back to its source and focus in both time and space. The time compression is studied versus the number of antennas in the TRM and its bandwidth. The focal spot is also measured thanks to an eight-channel receiving array.Keywords
This publication has 10 references indexed in Scilit:
- Time reversal of electromagnetic waves and telecommunicationRadio Science, 2005
- Time reversal with the FDTD method for microwave breast cancer detectionIEEE Transactions on Microwave Theory and Techniques, 2005
- Characterization of space-time focusing in time-reversed random fieldsIEEE Transactions on Antennas and Propagation, 2005
- Multipath-Enabled Super-Resolution for rf and Microwave Communication using Phase-Conjugate ArraysPhysical Review Letters, 2004
- Time Reversal of Electromagnetic WavesPhysical Review Letters, 2004
- Real-time focusing using an ultrasonic one channel time-reversal mirror coupled to a solid cavityThe Journal of the Acoustical Society of America, 2004
- Spatial Correlation Functions for Fields in Three-Dimensional Rayleigh ChannelsProgress In Electromagnetics Research, 2003
- Random multiple scattering of ultrasound. I. Coherent and ballistic wavesPhysical Review E, 2001
- One-Channel Time Reversal of Elastic Waves in a Chaotic 2D-Silicon CavityPhysical Review Letters, 1997
- Time Reversed AcousticsPhysics Today, 1997