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A novel piezoelectric bridge transducer was developed for an energy harvesting application from vehicle induced loading on pavement. A unique electrode design enables the PZT to be poled horizontally, enabling the d33 piezoelectric coefficient to be utilized by the transducer, enhancing energy output. The transducers were fabricated and assembled in an energy harvesting module and the output energy...
A novel bridge transducer based on the cymbal design has been developed for energy harvesting from impact loading by vehicle-induced deformations in pavement. The bridge transducer consists of a 2 mm thick 32×32 mm square soft PZT ceramic and hardened steel end caps. A novel electrode design is used to polarize the piezoelectric ceramic along its length, effectively utilizing d33 mode for enhanced...
Miniaturization of traveling-wave (TW) antennas by the slow-wave (SW) technique is shown highly promising over large instantaneous bandwidths, up to 10:1 for the unidirectional radiator and over 100:1 for the omnidirectional radiator. The technique enables a single multifunction antenna to handle virtually all terrestrial and satellite communications on an automobile, except for AM/FM radio.
A one-dimensional conductivity barrier model is introduced to describe the dielectric response and conductivity of BiFeO3 (BFO) and (Bi0.95Nd0.05)FeO3 (BFO-5%Nd) ceramics as functions of temperature and frequency. Good qualitative fits of conductivity and dielectric permittivity in the intermediate-temperature region (500–800 K) are obtained with intrinsic barriers of B=8700 K (for BFO) and B=8400...
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