研究目的
Investigating the design, fabrication, and performance of a flexible triple-band band-stop metamaterial filter for terahertz applications.
研究成果
The designed flexible triple-band band-stop metamaterial filter achieves excellent frequency blocking performance in the terahertz band, with resonant points at 107.3, 167.45, and 209.9 GHz. The filter's flexibility allows it to conform to curved surfaces, expanding its applicability. The study demonstrates the feasibility of using metamaterials for THz filtering and provides insights into parameter optimization and fabrication techniques. Future work could focus on improving fabrication precision and exploring dynamic tunability.
研究不足
The measured size of the metamaterial is finite (15x15 cm2) compared to the infinite plane assumption in simulation, leading to frequency offsets and weaker stop-band suppression. Machining tolerance errors also affect performance. The filter shows sensitivity to electromagnetic wave polarization, which must be considered in applications.
1：Experimental Design and Method Selection:
The study involves designing a metamaterial filter with a periodic cell array structure, simulated using CST2017 software to optimize parameters. The filter is fabricated using MEMS technology and lift-off process, and tested using a waveguide method.
2：Sample Selection and Data Sources:
The filter is fabricated on a flexible polyimide substrate with copper metal structures. Simulation data is generated from CST2017, and experimental data is measured using a vector network analyzer.
3：List of Experimental Equipment and Materials:
Equipment includes magnetron sputtering machine, ultrasonic cleaner, baking table, glue machine, exposure machine, sputtering machine, and vector network analyzer. Materials include polyimide substrate, copper, AZ5214E glue, acetone, isopropyl acetone, ethanol, deionized water, nitrogen, high-temperature tape, and developer liquids.
4：Experimental Procedures and Operational Workflow:
The fabrication process involves cleaning the substrate, applying photoresist, exposure, development, sputtering copper, and lift-off. Testing involves placing the filter in a custom rectangular waveguide and measuring S-parameters with a vector network analyzer.
5：Data Analysis Methods:
Data analysis includes extracting S-parameters, permittivity, permeability, refractive index, and impedance from simulation and measurement results, using methods from CST data analysis and comparison with theoretical models.
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
