研究目的
To realize high-efficiency broadband asymmetric transmission (AT) of linearly polarized electromagnetic wave (EM) in the microwave region from 10.1GHz to 15.1GHz using a novel bi-layered chiral metamaterial (CMM).
研究成果
A new Bi-layered chiral metamaterial, supporting high-efficiency broadband asymmetric transmission of linearly polarized wave has been proposed. The polarization conversion ratio is more than 92% over the entire frequency band. The introduced structure is attractive and can be practical for various KU band systems and useful for THz and optical frequency ranges.
研究不足
The discrepancy between the simulated and measured curves may be due to fabrication tolerance and the test setup environment. The edge diffraction can be arisen because the physical size of the designed structure is not infinite.
1：Experimental Design and Method Selection:
A pair of modified resonators is employed on two sides of a thin dielectric substrate to design the CMM. CST Microwave Studio simulation tool is used for numerical simulations.
2：Sample Selection and Data Sources:
The structure is fabricated and measured in a transmission experiment setup with horn antennas connected to a vector network analyzer.
3：List of Experimental Equipment and Materials:
FR4 substrate with relative permittivity of
4：4 and loss tangent of 02, thin copper film with thickness of 30μm and conductivity of 8×107S/m. Experimental Procedures and Operational Workflow:
The fabricated CMM prototype is placed between two horn antennas, and transmission coefficients are measured for all four feasible combinations of vertically and horizontally polarized transmitter and receiver horn antennas.
5：Data Analysis Methods:
The transmission coefficients, asymmetric transmission parameters, polarization conversion ratio, chirality parameter, polarization azimuth angle, and ellipticity are analyzed.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
