Dielectric Material Characterization by Complex Ratio of Embedded Modulated Scatterer Tecnoqie States

The embedded modulated scatterer technique (MST) is an innovative tool which can be used for microwave dielectric characterization of infrastructure and composite structures. By impinging a microwave signal on a loaded thin dipole antenna embedded in a material whose dielectric properties are sought, the resulting reflection data can be used to inversely solve for the dielectric properties of interest. Previous investigations utilized reflection information from a single loaded dipole and required known system parameters, such as radiator polarization vs. dipole alignment and relative distance between radiator and probe, to solve for the sought-for dielectric properties. This paper explores a unique application of embedded MST in which the ratio of the reflection coefficients for two independent states of a PIN diode-loaded dipole probe is utilized to significantly simplify the method for calculating dielectric properties