شماره ركورد كنفرانس :
3926
عنوان مقاله :
Ultra-Wideband Electromagnetic Space-Frequency Time Reversal Beamforming in a Rectangular Metal Tube
پديدآورندگان :
Ebrahimi-Zadeh Javad javad.ebrahimi@ut.ac.ir School of Electrical and Computer Engineering The university of Tehran,Tehran,Iran , Dehmollaian Mojtaba m.dehmollaian@ut.ac.ir the Center of Excellence on Applied Electromagnetic Systems, School of Electrical and Computer Engineering The university of Tehran,Tehran,Iran , Mohammadpour-Aghdam Karim kaghdam@ut.ac.ir With the Center of Excellence on Applied Electromagnetic Systems, School of Electrical and Computer Engineering The university of Tehran,Tehran,Iran
كليدواژه :
DORT , Dyadic Green’s function , Dispersions , Spacefrequency time reversal , Structural health monitoring system.
عنوان كنفرانس :
بيست و چهارمين كنفرانس مهندسي برق ايران
چكيده فارسي :
This paper has designed a structural health monitoring system to localize a defect on the wall of a rectangular tube by using space-frequency time reversal beamforming. The propagated electromagnetic wave in a metal rectangular tube is distorted by intermodal and intramodal dispersions. Time reversal beamforming is a novel signal processing technique which can alleviate the channel dispersions by back-propagating the time reversed signal in the problem medium by means of the exact Green’s function. We use four ultrawideband printed quasi-Yagi antennas with the bandwidth of at the central frequency to excite several different wavemodes of an infinite rectangular metal tube. Finally, we show that the range resolution of the space-frequency time reversal and DORT time reversal are in good agreement.
