27 November 2001 Design of an on-line sensor system with spread-spectrum and modulated backscatter techniques
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Abstract
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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Ferenc Voelgyi, Ferenc Voelgyi, } "Design of an on-line sensor system with spread-spectrum and modulated backscatter techniques", Proc. SPIE 4491, Subsurface and Surface Sensing Technologies and Applications III, (27 November 2001); doi: 10.1117/12.450156; https://doi.org/10.1117/12.450156
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