研究目的
To propose an aperture-coupled antenna with an ultrathin, single-layer metasurface for linear-to-circular (LP–CP) polarization conversion.
研究成果
The proposed antenna exhibits wideband CP-radiation with an S11 BW of 21.5% and AR BW of 19.23%. The measured boresight gain varies between 9 and 11.2 dBic throughout the operating band, making it suitable for modern cognitive radios and vehicular communications.
研究不足
Deviations at resonance due to fabrication errors, misalignments, the connecting coaxial cable, and the portable anechoic chamber.
1：Experimental Design and Method Selection:
The design involves a single-layer metasurface for LP-CP conversion and an aperture-coupled patch antenna for wideband high gain circular polarization.
2：Sample Selection and Data Sources:
The unit cell of the metasurface is composed of a hexagonal ring surrounded by a square ring printed on both sides of a dielectric substrate.
3：List of Experimental Equipment and Materials:
RT duroid 5880 with a dielectric constant of
4：2 is used as the substrate material. Experimental Procedures and Operational Workflow:
The antenna is assembled using plastic poles at the corner, and measurements are conducted in a 3 GHz-12 GHz anechoic chamber.
5：Data Analysis Methods:
Simulated and measured radiation patterns, S11, axial ratio bandwidth, and gain are compared.
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