期刊
IEEE ACCESS
卷 9, 期 -, 页码 107437-107445出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/ACCESS.2021.3101641
关键词
Compact antenna; integrated antenna; IoT devices; photovoltaic (PV) cell; slot antenna
资金
- National Research Foundation of Korea (NRF) grant - Korea Government Ministry of Science and ICT (MSIT) [2018R1D1A1A02086071]
- Human Resources Program in Energy Technology of Korea Institute of Energy Technology Evaluation and Planning (KETEP)
- Ministry of Trade, Industry and Energy, Republic of Korea [20184030202220]
The study presents a compact and low-profile photovoltaic cell with a built-in antenna design for Internet of Things applications, demonstrating high efficiency and optical transparency.
A compact and low-profile photovoltaic (PV) cell with a Built-In antenna is proposed for Internet of Things (IoT) applications. The proposed design exploits the gallium arsenide (GaAs)-based PV cell for antenna operation; for this purpose, a hexagonal slot with a trapezoidal perturbation is cut from the active area and bottom contact of the PV cell for resonance. The bottom contact of the PV cell is also used as the ground plane for the antenna. An AC blocking circuit is designed to prevent the flow of RF current toward the PV cell, and a chip inductor is used as an RF choke in the circuit. Thus, a single device simultaneously functions as a PV cell and an antenna. The GaAs PV cell shows a power conversion efficiency (PCE) of 13.25% without antireflection coating, with an open-circuit voltage (V-oc), a short-circuit current density (J(sc)), and a fill factor (FF) of 0.963 V, 21.00 mA/cm(2), and 65.52%, respectively. Furthermore, the optical transparency of the proposed PV-cell antenna is greater than 90%. The complete structure occupies an overall volume of 31.4 mm x 33 mm x 0.639 mm (0.25 lambda(o) x 0.26 lambda(o) x 0.0052 lambda(o) at 2.45 GHz), and the antenna operates in the range of 2.14 to 2.94 GHz, with a gain of 2.8 dBi at 2.45 GHz.
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