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A Multifunctional PVDF–Cobalt Ferrite Nanocomposite Platform for CPW-Fed Microstrip Patch Antennas and Mechanical Energy Harvesting
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DOI：10.1002/app.71147.png)
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Abstract
En 中文
PVDF–cobalt ferrite (CoFe2O4; CFO) nanocomposites were developed as multifunctional materials for both coplanar waveguide (CPW)-fed microstrip patch antenna (MSP) and piezoelectric energy harvesting. The CFO loading was varied from 0 to 20 wt% to obtain the optimal composition for antenna operation. X-ray diffraction and FTIR analysis confirmed the structural characteristics of the nanocomposite and the transformation of PVDF from the α to electroactive β-phase. FE-SEM shows a uniform CFO dispersion at lower loading and agglomeration at higher CFO concentrations within the PVDF matrix. CPW-fed microstrip patch antenna (MSP) was simulated using High Frequency Structure Simulator (HFSS) software, and the optimized design (20 mm × 20 mm, 70–100 μm thick) was developed using a piezoelectric PVDF–CFO nanocomposite substrate. The P20CFO antenna exhibited the maximum bandwidth of 12GHz, effectively covering the Ku, Ka, and K frequency bands along with highest gain of 14 dB with 99% radiation efficiency. Additionally, the P5CFO piezoelectric nanogenerator (PENG) delivered the maximum output voltage of 7 V across a 1 MΩ load under periodic fist tapping, with a power density of 1.2 μW/cm2. These results demonstrate the multifunctional nature of PVDF–CFO nanocomposites and their promising potential in both energy harvesting and high frequency antenna applications.
Keywords:
cobalt ferrite flowers-like nanospheres
CPW-fed flexible antenna
piezoelectric nanogenerator
PVDF
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