Dual-band energy harvesting antenna based on PVDF piezoelectric material

In this paper, a compact dual-band and CPW feeding antenna based on PVDF (polyvinylidene fluoride) piezoelectric film is proposed, which is suitable for 3G/4G/5G. The antenna is designed by a pair of fan-shaped CPW metal patches on PVDF film, the proposed antenna covers a bandwidth range of 1.9-2.8 GHz and 3.9-6 GHz. The gain is 2.05 dB at 2.4 GHz and 2.7 dB at 4.4 GHz. It has a compact size of 51 × 54 mm2 with the piezoelectric substrate thickness of 0.1 mm and dielectric constant of 9.5. The antenna shows good omnidirectional radiation characteristics in both lower and higher frequency bands. This piezoelectric antenna can be used for the RF and vibration hybrid energy harvesting system.