研究目的
To design and analyze a dual-band high selective frequency selective surface (FSS) with stable performance for various incident angles and polarizations, suitable for applications like satellite communications.
研究成果
The proposed dual-band FSS achieves high selectivity with two transmission bands separated by zeros, providing broad and flat band performance. It demonstrates stability for incident angles up to 60° and insensitivity to polarization. The design is validated through simulation and experimental verification, showing good agreement and suitability for practical applications like satellite communications.
研究不足
The equivalent circuit model lacks numerical investigation for spatial couplings, making it primarily qualitative. Fabrication and measurement errors may cause discrepancies, such as higher transmission coefficients in some cases. Performance deteriorates slightly with increasing incident angles, and spurious resonances appear for TM polarization at higher angles.
1：Experimental Design and Method Selection:
The FSS is designed by cascading three layers of periodic metallic arrays (two exterior layers with gridded-double square loops and a middle layer with a wire grid), separated by dielectric substrates. An equivalent circuit model is used for qualitative analysis. Full-wave electromagnetic simulation is performed using CST Microwave Studio.
2：Sample Selection and Data Sources:
A prototype FSS is fabricated using printed circuit board technology with specific dimensions (360x360 mm2, 72x72 elements). Measurements are conducted in a microwave anechoic chamber using standard horn antennas.
3：List of Experimental Equipment and Materials:
F4B-2 substrates (dielectric constant 2.65 + 0.02i, thickness 1.5 mm), copper for metallic patterns, bonding film, standard horn antennas (operating at 8-12 GHz, 12-18 GHz, 18-26 GHz), and a rotated platform.
4：65 + 02i, thickness 5 mm), copper for metallic patterns, bonding film, standard horn antennas (operating at 8-12 GHz, 12-18 GHz, 18-26 GHz), and a rotated platform.
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The FSS is fabricated by patterning metal layers on substrates and bonding them. Transmission coefficients are measured with and without the FSS using a free-space method, calibrated for accuracy. Simulations and measurements are compared under normal and oblique incidences for TE and TM polarizations.
5：Data Analysis Methods:
Data is analyzed by comparing simulated and measured transmission and reflection coefficients, focusing on bandwidth, transmission poles/zeros, and stability with incident angles and polarizations.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
