研究目的
To design a compact rectenna with high efficiency at 35GHz for millimeter-wave wireless power delivery, suitable for rectenna arrays applications.
研究成果
The designed rectenna achieves high efficiency (53.2%) and compact size (0.42λ0×0.46λ0) at 35GHz, making it suitable for rectenna arrays. The removal of input filters simplifies the circuit and improves efficiency. This work paves the way for applications in wireless power transmission for wearable devices, IoT systems, and satellite powering.
研究不足
The design requires precise assembly due to sensitivity to the length of the short-ended microstrip line. It is optimized for high power density scenarios and may not perform as well in low power applications. The use of millimeter waves introduces challenges in fabrication and measurement accuracy.
1：Experimental Design and Method Selection:
The rectenna is designed with a patch antenna fed by a coupling slot and a compact rectifier printed on the bottom side. The input filter is replaced by a short-ended microstrip line for impedance matching and harmonic blocking. Simulation tools HFSS and ADS are used for design and optimization.
2：Sample Selection and Data Sources:
The antenna and rectifier are fabricated using Rogers 5880 substrate. Measurements are conducted with a transmitter at 35GHz and a receiver placed 20cm away.
3：List of Experimental Equipment and Materials:
Includes a Schottky diode (MA4E1310 from MACOM), Rogers 5880 substrate, voltmeter, lens antenna, horn antenna, and fabrication tools.
4：Experimental Procedures and Operational Workflow:
The antenna and rectifier are integrated, fabricated, and measured. Power density is measured with a horn antenna, and DC output is measured with a voltmeter. Efficiency is calculated from input power and DC output.
5：Data Analysis Methods:
Efficiency is calculated using formulas for DC output power and conversion efficiency. Simulation results are compared with measurements.
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