研究目的
To design a single aperture antenna which operates at two frequencies with orthogonal polarizations to reduce the size and the cost of the system for two-way satellite communication.
研究成果
A dual-band dual-orthogonal CP FPRA in X-band based on the chiral metamaterial is proposed, suitable for a two-way satellite communication system. The experimental results show that the FPRA yields around 12.98 and 13.25 dBic gains at 7.28 and 8 GHz, respectively.
研究不足
The resonance frequencies of the simulations and measurements are slightly higher than that of the calculations, possibly due to the finite size of the superstrate in the fabricated model and the approximation of the feed in calculation.
1：Experimental Design and Method Selection:
The study employs a Fabry-Perot resonator antenna (FPRA) with dual-band dual-orthogonal circular polarization, consisting of a linearly polarized microstrip patch antenna and a chiral metamaterial superstrate. The ray-tracing method in the circular base is introduced to describe the mechanism of this type of FPRA.
2：Sample Selection and Data Sources:
A prototype antenna is fabricated to validate the simulated results.
3：List of Experimental Equipment and Materials:
The antenna includes a copper patch printed on the upper surface of a small Rogers RT/Duroid 4003C substrate and a chiral metamaterial superstrate.
4：Experimental Procedures and Operational Workflow:
The study involves the design and simulation of the antenna, followed by fabrication and measurement of the prototype to validate the simulated results.
5：Data Analysis Methods:
The study analyzes the antenna's performance in terms of impedance matching, axial ratio, realized gains, and radiation patterns.
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