研究目的
To design and test an antenna integrated thin film solar cell for wearable wireless energy harvesting system.
研究成果
The fabricated antenna integrated with a thin film solar cell demonstrates dual-band operation at 1.85 and 2.45 GHz with good power conversion efficiency. The system is suitable for wearable wireless energy harvesting applications, with potential for further optimization and integration with power control units for enhanced performance.
研究不足
The study focuses on low and ultra-low power electronic applications. The performance under extreme bending conditions or varying environmental factors beyond the tested parameters may require further investigation.
1：Experimental Design and Method Selection:
The study involves the integration of a dual band microstrip antenna with a thin film amorphous silicon solar cell to create a wearable system for harvesting microwave energy. The multiple layers in the encapsulation of the thin film solar cell are used as a substrate for the microstrip antenna. The rectifier and matching circuit are designed on cotton jeans material, supported by a 5 mm thick foam.
2：Sample Selection and Data Sources:
The performance of the antenna is studied under mechanical bending conditions. The efficiency of the voltage doubler is tested by varying radio frequency power levels from ?30 to 10 dBm.
3：List of Experimental Equipment and Materials:
The system includes a thin film amorphous silicon solar cell, cotton jeans material for the rectifier and matching circuit, and a 5 mm thick foam for mechanical support.
4：Experimental Procedures and Operational Workflow:
The antenna's performance is measured under both flat and bent conditions. The voltage doubler's conversion efficiency is evaluated at 1.85 and 2.45 GHz for different input power levels and load resistances.
5：85 and 45 GHz for different input power levels and load resistances.
Data Analysis Methods:
5. Data Analysis Methods: The conversion efficiency is calculated based on the output DC voltage and the input RF power levels. The performance is also analyzed under varying solar irradiation conditions for hybrid energy harvesting.
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