研究目的
To design a compact binomial rectangular patch antenna array with wide bandwidth and circular polarization for L-band radar applications, focusing on reducing side lobe levels and the negative effects of complex feed networks.
研究成果
The proposed wideband circular polarized binomial antenna array demonstrates satisfactory performance for L-band radar applications, with reduced side lobe levels and low mutual coupling. The use of diagonally truncated patches and an air cavity enhances bandwidth and gain, making the antenna suitable for phased array and radar applications.
研究不足
The study focuses on simulation results, and practical implementation challenges such as fabrication tolerances and environmental effects on performance are not discussed. The reduction of side lobe levels, while significant, may require further optimization for specific radar applications.
1：Experimental Design and Method Selection:
The design involves a 16-element planar antenna array with individual coaxial feeds to each element to mitigate the negative effects of complex feed networks. Diagonal truncations of patch elements are used to achieve circular polarization, and an air cavity between the ground plane and substrate is introduced to enhance gain and bandwidth.
2：Sample Selection and Data Sources:
The antenna is designed on an RT Duroid 5880 substrate with specific dimensions and properties, including a relative dielectric constant of 2.2 and a thickness of 62 mils. An aluminum plate serves as the ground plane.
3：2 and a thickness of 62 mils. An aluminum plate serves as the ground plane.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: RT Duroid 5880 substrate, aluminum plate for ground plane, coaxial feed with 50 Ω impedance, foam material to fill the air cavity for fabrication purposes.
4：Experimental Procedures and Operational Workflow:
The antenna elements are arranged with half-wavelength inter-element spacing. Nonuniform amplitudes based on Pascal triangle coefficients are applied to the antenna elements to reduce side lobe levels.
5：Data Analysis Methods:
Simulation results are analyzed to evaluate the antenna's performance, including reflection coefficient, mutual coupling, radiation pattern, axial ratio, and gain.
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