300 GHz frequency modulated continuous wave (FMCW) radar system for detecting rocks’ lithological changes
Résumé
Remote sensing of lithological changes is of high interest in industrial domains such as geotechnics and mineral exploration. Usually, applied methods are based in acoustics or ground penetrating radars working at HF/VHF frequencies. Their limitations are due to the trade-off between spatial resolution and rock penetration. Currently, frequency modulated continuous wave (FMCW) at frequencies higher than 60 GHz are more accessible and available at reasonable prices. However, their feasibility for measuring lithological changes has not been studied yet. Therefore, in this work we have proposed to make measurements with a 300 GHz FMCW radar to detect the interfaces between two limestone of similar refractive indices. As a result, they were successfully detected even after 2 cm rocks’ penetration.
Mots clés
Frequency modulation
Ground penetrating radar
Radar measurements
Current measurement
Radar detection
Rocks
Acoustics
CW radar
FM radar
Geophysical techniques
Millimetre wave radar
Remote sensing
Mineral exploration
Frequency modulated continuous wave radar system
Rocks lithological changes
Geotechnics application
FMCW radar system
Limestone interfaces
Similar refractive indices
Frequency 300.0 GHz
Size 2.0 cm