研究目的
To propose a systematic design procedure for a compact and broadband circularly polarized antenna using characteristic mode analysis to enhance bandwidth and provide theoretical insights.
研究成果
The proposed antenna achieves a 91% fractional bandwidth for circular polarization with compact size and broadside gain, demonstrating the effectiveness of CMA in antenna design and optimization.
研究不足
CMA is time-consuming for wideband antennas and mode tracking can be difficult; the approach is optimized for specific frequency ranges and may not generalize to all antenna types.
1：Experimental Design and Method Selection:
The design uses characteristic mode analysis (CMA) to understand antenna modes and optimize structure, combined with numerical simulations in CST Microwave Studio for fine-tuning.
2：Sample Selection and Data Sources:
Antenna prototypes are fabricated on Taconic RF-35 substrate; simulations and measurements are used for validation.
3：List of Experimental Equipment and Materials:
Substrate (Taconic RF-35, εr =
4：5, thickness 5 mm), microstrip feeding line, fabricated antenna prototype. Experimental Procedures and Operational Workflow:
Steps include CMA for initial parameter prediction, full-wave simulation for optimization, fabrication, and measurement of reflection coefficient, axial ratio, gain, and radiation patterns.
5：Data Analysis Methods:
Analysis of S11, axial ratio, gain, and radiation patterns using simulation and measurement data.
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