研究目的
To improve the frequency bandwidth of traditional narrowband metamaterials by proposing a method using a tri-ring resonator with increasing order of resonators.
研究成果
The proposed tri-ring resonator metamaterial effectively enhances bandwidth from 2.2% to up to 16% by increasing the order of resonators and rotating inner rings. It shows potential for applications in rejection filters for various wireless standards like Bluetooth, Wi-Fi, WiMAX, and 5G, offering improved performance over traditional narrowband metamaterials.
研究不足
The study is based on simulations and limited experimental validation; the bandwidth enhancement may be constrained by fabrication tolerances and the specific design parameters used. Further optimization and real-world application testing are needed.
1：Experimental Design and Method Selection:
The study involves designing a tri-ring resonator metamaterial unit cell, simulating it using a full-wave simulator (HFSS), and analyzing its properties using MATLAB to extract effective parameters from S-parameters. The method includes increasing the order of resonators and varying ring rotations to enhance bandwidth.
2：Sample Selection and Data Sources:
The metamaterial structure is designed with specific dimensions (e.g., outer ring radius 6.0 mm, middle 4.8 mm, inner 3.6 mm, gap 0.6 mm). Data is sourced from simulations and measurements using a vector network analyzer.
3：0 mm, middle 8 mm, inner 6 mm, gap 6 mm). Data is sourced from simulations and measurements using a vector network analyzer.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: HFSS Simulator for simulation, MATLAB for analysis, vector network analyzer (Agilent N9918A) for measurements, and PCB materials for fabrication.
4：Experimental Procedures and Operational Workflow:
Design the tri-ring resonator, simulate in HFSS to obtain S-parameters, use MATLAB to calculate permittivity, permeability, and refractive index, fabricate prototypes, measure S-parameters with the vector network analyzer, and analyze results for bandwidth improvement.
5：Data Analysis Methods:
Analyze S-parameter magnitude and phase to determine resonance frequencies and bandwidth; use MATLAB scripts for parameter extraction based on simulated data.
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