Design of an on-line sensor system with spread-spectrum and modulated backscatter techniques

Details Design of an on-line sensor system with spread-spectrum and modulated backscatter techniques Design of an on-line sensor system with spread-spectrum and modulated backscatter techniques

Nov 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001spie.4491..151v&link_type=abstract

Proc. SPIE Vol. 4491, p. 151-158, Subsurface and Surface Sensing Technologies and Applications III, Cam Nguyen; Ed.

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In a composite board factory, the continuous permittivity monitoring of large-sized particle boards was to be solved using a microwave on-line sensor system. The method described below is based on a free-space / double transmission/ reflection type two-parameter (complex vector) measurement. A short description of the measurement set-up, the system-design and the design of the basic microwave elements are included. Using low cost MMICs, self-designed microstrip antennas and passive detectors/ modulated-backscatterers combined with modern digital spread-spectrum techniques made the realization of the concept possible.

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