研究目的
To design and fabricate compact microstrip antennas based on split-ring resonator (SRR) structure, analyze the influence of geometric parameters on resonant frequency, and demonstrate tunability of resonant frequency while maintaining good performance.
研究成果
The proposed SRR-based microstrip antenna allows for tunable resonant frequency through adjustment of key geometric parameters, with good agreement between simulation and measurement results. It maintains compact size and good radiation performance, providing a theoretical basis for future antenna designs in wireless communication applications.
研究不足
The study is limited to specific geometric parameters and frequency range (13.5 GHz to 17.2 GHz); deviations in measurements may arise from uncertainties in dielectric constant of FR4 substrate, and the antenna's bandwidth is relatively narrow (around 250 MHz).
1：Experimental Design and Method Selection:
The study involves designing a microstrip antenna with an SRR structure, using simulation software to model electromagnetic behavior, and fabricating prototypes for experimental validation. The finite integration technique is employed for simulations.
2：Sample Selection and Data Sources:
Antennas are fabricated with varying geometric parameters (length of long strip patch, side length of SRR, split length) on an FR4 substrate. Data is sourced from simulations and measurements of reflection coefficients and radiation patterns.
3：List of Experimental Equipment and Materials:
FR4 substrate (thickness 1 mm, dielectric constant 2.65), copper microstrip line (width 1.4 mm, thickness 0.1 mm), SMA connector, vector network analyzer (VNA) for measurements, CST Microwave Studio software 2011 for simulations.
4：65), copper microstrip line (width 4 mm, thickness 1 mm), SMA connector, vector network analyzer (VNA) for measurements, CST Microwave Studio software 2011 for simulations.
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: Design antenna geometry, simulate using CST software to analyze reflection coefficients and current distributions, fabricate antennas, measure reflection coefficients with VNA, and analyze radiation patterns and gain.
5：Data Analysis Methods:
Compare simulated and measured reflection coefficients to assess agreement, analyze the effects of parameter changes on resonant frequency, and evaluate radiation performance using gain and pattern data.
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