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How Many Bits Are Required for RIS Designs Without Far-Field Quantization Lobe?
Ruiqi Wang, Yiming Yang, Atif Shamim
Reconfigurable Intelligent Surface (RIS) designs with 1-bit phase resolution often suffer from strong quantization lobes in the far field, which significantly degrade wireless comm…
A 100 GHz Wideband Reconfigurable Intelligent Surface Based on Orthogonal Polarization and Sub-Array Partitioning Concepts
Ruiqi Wang, Behrooz Makki, Atif Shamim
The sub-terahertz frequency band offers extremely large bandwidth and enables ultra-high data rates for future wireless applications. However, severe propagation loss and blockage…
Reconfigurable Antennas for Next-Generation Wireless Communications: Technologies, Prototypes, Architectures, and Signal Processing
Pinjun Zheng, Ruiqi Wang, Yuchen Zhang +4
The transition to sixth-generation (6G) networks calls for wireless transceivers with enhanced adaptability and efficiency. Reconfigurable antennas (RAs) have emerged as a promisin…
A 2-bit Wideband 5G mm-Wave RIS with Low Side Lobe Levels and no Quantization Lobe
Ruiqi Wang, Yiming Yang, Atif Shamim
Reconfigurable intelligent surface (RIS) with 1-bit phase resolution suffers from high side lobe levels (SLLs) in the near field and pronounced quantization lobe levels (QLLs) in t…
Electromagnetically Reconfigurable Fluid Antenna System for Wireless Communications: Design, Modeling, Algorithm, Fabrication, and Experiment
Ruiqi Wang, Pinjun Zheng, Vijith Varma Kotte +5
This paper presents the concept, design, channel modeling, beamforming algorithm development, prototype fabrication, and experimental measurement of an electromagnetically reconfig…
A Fully Screen-Printed Vanadium-Dioxide Switches Based Wideband Reconfigurable Intelligent Surface for 5G Bands
Yiming Yang, Mohammad Vaseem, Ruiqi Wang +2
Reconfigurable Intelligent Surface (RIS) is attracting more and more research interest because of its ability to reprogram the radio environment. Designing and implementing the RIS…