1. High performance metamaterial device with enhanced electromagnetic energy harvesting efficiency
- Author
-
Hailin Cao, Shuai Shang, Jing Liu, Meng Shan, and Shizhong Yang
- Subjects
Frequency response ,Materials science ,business.industry ,General Physics and Astronomy ,Metamaterial ,02 engineering and technology ,Input impedance ,021001 nanoscience & nanotechnology ,01 natural sciences ,lcsh:QC1-999 ,law.invention ,Rectifier ,Resonator ,law ,0103 physical sciences ,Optoelectronics ,Resistor ,010306 general physics ,0210 nano-technology ,business ,Absorption (electromagnetic radiation) ,Energy harvesting ,lcsh:Physics - Abstract
A high performance metamaterial device for electromagnetic energy harvesting is presented. The unit cell of the metamaterial device consists of four identical omega ring resonators arranged in rotational symmetry, and each omega ring is loaded with a 50 Ω resistor that mimics the input impedance of a rectifier circuit. A proof-of-concept prototype is designed for operation at the frequency of 5.8 GHz. Here, the efficient energy harvesting is validated by the energy dissipated in each resistor. Based on the full absorption concept, the metamaterial device achieves a harvesting efficiency up to 93.1% under normal incidence. In addition, the energy harvester shows polarization independent and wide-angle incident frequency responses with good harvesting characteristics over the entire operating range. The surface current distribution is analyzed to gain an insight into the energy harvesting mechanism. Moreover, the harvester prototype is manufactured and measured, and the simulated and measured results are in good agreement. Due to the enhanced electromagnetic energy harvesting efficiency, the proposed device is a good candidate for microwave power transmission.
- Published
- 2017