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A novel ultrasensitive gas detector system based on carbon nanotube mixtures and antenna radiation variation

A highly sensitive remote-sensing detector based on a mixture of double-walled carbon nanotubes has been designed to selectively detect different gases. The sensor consists of an antenna and a gas sensitive transmission line, operating at 60 GHz. The detection principle is based on different shifts of amplitude and phase of the antenna-feeding signal due to the presence of different gases, resulting in the change of the polarization and radiation pattern of the sensor antenna.