研究目的
To design slot array antennas based on metasurface by investigating the geometrical parameters of the embedded metasurface and their relations to build up the engineered electric and magnetic fields.
研究成果
The paper presents a novel approach to design slot array antennas by utilizing periodic impedance surfaces, eliminating the need for slots offsets. The designed antenna shows improved side lobe level compared to conventional methods. The method could be extended to other electromagnetic devices for exploiting new properties.
研究不足
The study focuses on the impact of impedance boundaries on field formation and features in waveguide and slot array antenna, without exploring various methods to realize impedance surfaces.
1：Experimental Design and Method Selection:
The study employs analytical relations to extract cut-off dispersion, longitudinal and transverse components of the wave number, and longitudinal component of the magnetic field, validated by Full-wave software.
2：Sample Selection and Data Sources:
A standard WR90 waveguide is used with specific impedance values.
3：List of Experimental Equipment and Materials:
MATLAB software for solving non-linear equations, HFSS software for simulation, and a milling machine for fabricating the antenna.
4：Experimental Procedures and Operational Workflow:
The magnitude and phase of the longitudinal component of the magnetic field are modeled by periodic impedance walls. A meta-waveguide antenna with five slots is designed and fabricated.
5：Data Analysis Methods:
The results are compared with those obtained by Elliott’s method to validate the approach.
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