Analysis of the Emitted Wavelet of High-Resolution Bowtie GPR AntennasReportar como inadecuado




Analysis of the Emitted Wavelet of High-Resolution Bowtie GPR Antennas - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Natural Resources & Environmental Engineering, EUET Forestal, University of Vigo, Campus A Xunqueira s-n. 36005 Pontevedra, Spain





*

Author to whom correspondence should be addressed.



Abstract Most Ground Penetrating Radars GPR cover a wide frequency range by emitting very short time wavelets. In this work, we study in detail the wavelet emitted by two bowtie GPR antennas with nominal frequencies of 800 MHz and 1 GHz. Knowledge of this emitted wavelet allows us to extract as much information as possible from recorded signals, using advanced processing techniques and computer simulations. Following previously published methodology used by Rial et al. 1, which ensures system stability and reliability in data acquisition, a thorough analysis of the wavelet in both time and frequency domain is performed. Most of tests were carried out with air as propagation medium, allowing a proper analysis of the geometrical attenuation factor. Furthermore, we attempt to determine, for each antenna, a time zero in the records to allow us to correctly assign a position to the reflectors detected by the radar. Obtained results indicate that the time zero is not a constant value for the evaluated antennas, but instead depends on the characteristics of the material in contact with the antenna. View Full-Text

Keywords: bow-tie antenna; source wavelet; time and frequency analysis; time zero bow-tie antenna; source wavelet; time and frequency analysis; time zero





Autor: Fernando I. Rial * , Henrique Lorenzo, Manuel Pereira and Julia Armesto

Fuente: http://mdpi.com/



DESCARGAR PDF




Documentos relacionados