研究目的
To propose a side lobe level (SLL) suppression technique using lossy superstrate for robust antenna design, optimizing dielectric parameters based on the spectral Green’s function to achieve low SLL in microstrip antenna arrays.
研究成果
The proposed technique using lossy superstrate effectively suppresses SLL in microstrip antenna arrays, achieving an SLL lower than -35dB under reasonable fabrication tolerance. The method is applicable to antennas with various polarizations and offers a promising approach for robust antenna design.
研究不足
The fabrication tolerance and the effect of the feed network on SLL suppression are significant challenges. The lossy superstrate's realization and parameter extraction require further investigation.
1：Experimental Design and Method Selection:
The study optimizes dielectric parameters (relative permittivity, thickness, and loss tangent) using the spectral Green’s function for SLL suppression in a 2*2 microstrip antenna array with a 2-layer dielectric superstrate.
2：Sample Selection and Data Sources:
A 2*2 microstrip rectangular patch antenna array operating at 35 GHz is used, with the substrate being 0.254 mm-thick Rogers RT/duroid
3：254 mm-thick Rogers RT/duroid List of Experimental Equipment and Materials:
5880.
3. List of Experimental Equipment and Materials: The study involves the use of a microstrip antenna array, dielectric superstrate layers, and commercial software IE3D for simulation.
4：Experimental Procedures and Operational Workflow:
The optimization is performed considering the precision of air gap thickness, with and without lossy superstrate, to evaluate SLL suppression and gain reduction.
5：Data Analysis Methods:
The relationship between available SLL and gain reduction is analyzed, and the performance is validated through simulation results.
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