Patent attributes
A lossy dielectric heat source transducer or other transducer can be formed using a multi-layer substrate, such as can include a power layer (to receive an applied electromagnetic input signal), a polyurethane or other polymeric electromagnetic energy absorption layer, and a coupling layer therebetween. The absorption layer can be doped with carbon or another dopant material to increase electromagnetic energy absorption. The coupling layer can be doped with barium titanate or another dopant material to focus electromagnetic energy passing through the coupling layer toward the absorption layer. Frequency-selective addressing of particular transducers can include using a plurality of planar resonators, which can be configured to resonate at the same or different specified frequencies of the applied electromagnetic input. Such addressing of such frequency-sensitive structures can permit location-specific actuation of one or more transducers.
