研究目的
Designing a switchable terahertz reflectarray antenna composed of crossed metal dipoles mounted on a graphene grid for switchable radiation patterns at 1 THz.
研究成果
The designed switchable terahertz reflectarray can deflect incident normal plane waves in a predesigned direction when biased, demonstrating a phase range over 330○. The performance is verified through simulations of field distributions, radiation patterns, and current distributions.
研究不足
The challenge faced by the proposed design is its manufacturability, requiring a complicated micromachining process to pattern the single layer of graphene into a specific periodic structure and place the graphene structure and metal dipoles in the same layer.
1：Experimental Design and Method Selection:
The design involves a reflectarray antenna with crossed platinum dipoles set in a graphene grid, utilizing the tunable conductivity of graphene for switchable operation.
2：Sample Selection and Data Sources:
The structure includes a top layer with platinum crossed dipoles and a graphene square loop, a quartz substrate, and a platinum ground plane.
3：List of Experimental Equipment and Materials:
Platinum for dipoles and ground plane, graphene for the grid, quartz as substrate, and alumina-silicon for bias electrodes.
4：Experimental Procedures and Operational Workflow:
Simulation of reflection coefficients by varying the length of the dipoles and applying different bias voltages to the graphene grid.
5：Data Analysis Methods:
Analysis of phase response, field distributions, and radiation patterns to verify the design's performance.
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