TY - GEN
T1 - A novel microwave-based inspection system for continuously streaming materials using a cavity resonator
AU - Hermann, Tobias
AU - Olbrich, Gerhard R.
AU - Russer, Peter
PY - 2008
Y1 - 2008
N2 - In this paper, we present a novel ultra-fast material inspection system for continuously streaming dielectric materials, such as paper, plastic films, non-aqueous liquids etc. The material stream is being passed through a cavity resonator whose electrical parameters are altered by the presence of the material, due to its interaction with the electric field inside the resonator. The latter is employed as the frequency-determining component in an amplitude-controlled oscillator circuit. Small changes in the electrical properties of the resonator due to fluctuations in the material stream cause the oscillator circuit to be detuned and damped. Monitoring the frequency of oscillation as well as the gain yields realtime information about the resonator's electrical parameters and, thus, allows assessment of material properties, such as water content, contamination, density etc.
AB - In this paper, we present a novel ultra-fast material inspection system for continuously streaming dielectric materials, such as paper, plastic films, non-aqueous liquids etc. The material stream is being passed through a cavity resonator whose electrical parameters are altered by the presence of the material, due to its interaction with the electric field inside the resonator. The latter is employed as the frequency-determining component in an amplitude-controlled oscillator circuit. Small changes in the electrical properties of the resonator due to fluctuations in the material stream cause the oscillator circuit to be detuned and damped. Monitoring the frequency of oscillation as well as the gain yields realtime information about the resonator's electrical parameters and, thus, allows assessment of material properties, such as water content, contamination, density etc.
UR - https://www.scopus.com/pages/publications/62349086798
U2 - 10.1109/EUMC.2008.4751599
DO - 10.1109/EUMC.2008.4751599
M3 - Conference contribution
AN - SCOPUS:62349086798
SN - 9782874870064
T3 - Proceedings of the 38th European Microwave Conference, EuMC 2008
SP - 901
EP - 904
BT - Proceedings of the 38th European Microwave Conference, EuMC 2008
T2 - 38th European Microwave Conference, EuMC 2008
Y2 - 27 October 2008 through 31 October 2008
ER -