研究目的
Investigating the polarization and incident angle independent metasurface absorber for X-band application.
研究成果
The proposed metasurface absorber shows good absorptivity over a wide range of oblique incident angles for both simulated and experimental results, making it a good candidate for microwave applications like RCS reduction and stealth technology.
研究不足
The absorptivity of the metasurface absorber is dependent on the oblique incident angle and polarization angle. Achieving angle insensitivity is challenging.
1：Experimental Design and Method Selection:
The design started from a cross-shaped resonator, enhanced by attaching a circular sector to improve absorptivity and angle insensitivity. The absorber was simulated with periodic Master-Slave boundaries and Floquet Port excitation using HFSS
2：Sample Selection and Data Sources:
The absorber unit cell was fabricated on a 0.8 mm thick FR-4 substrate with a completely metal ground plane on the back side.
3：8 mm thick FR-4 substrate with a completely metal ground plane on the back side.
List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: FR-4 substrate (dielectric constant (εr) = 4.4 and loss tangent (tan δ) = 0.02), Agilent N5221A network analyser for measurement.
4：4 and loss tangent (tan δ) = 02), Agilent N5221A network analyser for measurement.
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: The absorptivity was calculated with the incident electromagnetic wave excited along the z-axis. Reflection and transmission coefficients were measured to determine absorptivity.
5：Data Analysis Methods:
Absorption phenomenon was explained through normalized impedance, E-field distribution, and surface current density. Effective permittivity, permeability, and dispersion diagram were analyzed to characterize the metasurface property.
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
