研究目的
To review the recent research progress on reconfigurable reflectarrays (RRA) and reconfigurable transmitarrays (RTA) at Tsinghua University and demonstrate their potential in advanced wireless systems.
研究成果
RRAs and RTAs have experienced rapid development and demonstrate promising potential in future wireless communication systems. They offer a low-cost alternative to phased arrays with capabilities for high gain, high efficiency, and electronic beam steering.
研究不足
Challenges in high-frequency operation, multi-bit control, and practical engineering designs for RRAs and RTAs. Further fine tuning required to improve transmission magnitudes in some designs.
1：Experimental Design and Method Selection:
Various approaches for designing RRAs and RTAs, including the use of PIN diodes, MEMS switches, varactors diodes, and micro-motors for phase control.
2：Sample Selection and Data Sources:
Designs include W-band RRA, 2-bit RRA, 10240-element RRA, 2-layer RTA, and current-reversal RTA.
3：List of Experimental Equipment and Materials:
Includes GaAs chips with integrated PIN diodes, FPGA-based control boards, and customized waveguides.
4：Experimental Procedures and Operational Workflow:
Fabrication and testing of prototypes, including beam steering and scanning performance measurements.
5：Data Analysis Methods:
Measurement of phase differences, insertion loss, and beam scanning capabilities.
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