研究目的
To achieve continuous wide-angle beam scanning with consistent gain using a simple single-layer composite right/left-handed leaky-wave antenna structure.
研究成果
The proposed single-layer CRLH LWA with multiple vias enables continuous wide-angle beam scanning from -60° to +66° with a low gain variation of 2.9 dB, demonstrating design flexibility and potential for low-cost frequency-scanning radar systems. Future work could explore scalability to other frequencies and integration with practical applications.
研究不足
The study is limited to 1-D structures and may not extend to 2-D configurations. Fabrication challenges could arise for very low frequencies requiring extremely small via diameters. The antenna performance might be affected by substrate imperfections and measurement errors.
1：Experimental Design and Method Selection:
The study employs a 1-D composite right/left-handed (CRLH) structure based on modified mushroom cells. Dispersion analysis is conducted using equivalent circuit models and eigenmode simulations to achieve a balanced condition for continuous beam scanning.
2：Sample Selection and Data Sources:
Unit cells are designed with patches shorted to the ground plane using metallic vias. Parameters such as via diameter and spacing are optimized through simulations.
3：List of Experimental Equipment and Materials:
A single-layer substrate with thickness 2 mm, dielectric constant
4：2, and loss tangent 001 is used. Metallic vias and patches are fabricated. Experimental Procedures and Operational Workflow:
Antennas are designed with multiple vias per unit cell (e.g., two or three vias), simulated using ANSYS HFSS for S-parameters and radiation patterns, and a prototype is fabricated and measured for validation.
5：Data Analysis Methods:
Simulation results are compared with measured data for S-parameters, gain, directivity, and beam scan angles using standard antenna measurement techniques.
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