Abstract
This article proposes a new type of antenna capable of harvesting radio frequency, vibration and light energy based on piezoelectric and solar film materials. The antenna is designed by using solar film and Polyvinylidene fluoride(PVDF) piezoelectric film as the medium. Due to the high dielectric constant of the antenna medium, the size of the energy harvesting antenna can be effectively reduced. A stacked circle patch was designed for the microstrip antenna, and the antenna size is 53 mm × 60 mm × 0.6 mm. In order to improve the conversion efficiency, the rectifier circuit is optimized, and the modal analysis of PVDF is carried out. Test results show that the bandwidth of the antenna is 2–3 GHz. When the antenna is 50 cm away from the signal emission source with 3 dBm at 2.4 GHz, the output voltage is 2.02 V; under 75 Hz vibration excitation, the output voltage and power can reach 1.5 V and 1.13 mW; when the light intensity is 100 mW/cm2, the output voltage is 1.42 V, the output voltage can reach 1.3 V.
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