研究目的
To design high-gain Fabry-Perot (F-P) antennas with wideband low monostatic radar cross section (RCS) using phase gradient metasurface (PGM) and metamaterial absorber (MA) for applications in stealth technology and communication systems.
研究成果
The proposed F-P antennas with PGM structures achieve significant RCS reduction and high aperture efficiency, with the MA variant offering wider bandwidth for RCS reduction. These antennas are promising for applications requiring low observability and high gain, such as in stealth technology and communication systems.
研究不足
The study focuses on monostatic RCS reduction and high gain but may have limitations in terms of bandwidth for RCS reduction and the impact of fabrication and installation errors on performance. The use of MA reduces gain slightly compared to the antenna without MA.
1：Experimental Design and Method Selection:
The study involves designing two F-P antennas with PGM structures, one without a lossy layer and another with MA, to achieve RCS reduction and high aperture efficiency. Theoretical models and simulations are conducted using commercial software HFSS_v
2：Sample Selection and Data Sources:
The antennas are designed with specific dimensions and materials, including square loops and patches for the PGM structures, and resistors for the MA structure.
3：List of Experimental Equipment and Materials:
Includes microstrip antennas, superstrates with square loops and patches, resistors (150Ω), and vector network analyzer Agilent N5230C for measurements.
4：Experimental Procedures and Operational Workflow:
The design process involves optimizing the dimensions of the PGM structures for phase gradient and reflection properties, fabricating prototypes, and measuring their S11, gain, and RCS in an anechoic chamber.
5：Data Analysis Methods:
The performance of the antennas is analyzed based on simulated and measured S11, gain, and RCS reduction, comparing them with reference antennas and previous works.
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