Novel Structures and Technologies for Microwave Sensors

The use of wireless systems integrating sensing capabilities is becoming increasingly relevant for several applications under the umbrella of the Internet of Things. This work presents a review of some recent implementation structures and manufacturing technologies for the realization of microwave sensors, for applications ranging from the characterization of the electrical properties of materials to the determination of rotation and proximity. The use of planar structures and substrate integrated waveguide (SIW) technology, the fabrication by additive manufacturing, as well as the adoption of hybrid solutions are presented and discussed.