Capacitive level monitoring of layered fillings in vessels using composite right/left-handed transmission lines

Summary form only given, as follows. This paper presents a concept for level monitoring of layered fillings in vessels with partially or completely unknown properties of the filling materials. A key sensor component is a composite right/left-handed transmission line resonator. Based on this element in combination with multi-resonant cavity perturbation theory, an algorithm for the sensor signal processing is derived for the extraction of material properties and filling levels. The presented concept is experimentally verified.