Enabling Next Generation Wireless Communication through mm-Wave Reconfigurable Intelligent Surface (RIS)
The mm-wave 5G and beyond communication systems significantly improve the data rate, user capacity, and latency, however, the electromagnetic (EM) wave propagation suffers from high atmospheric attenuation as compared to the sub-6 GHz bands. Therefore, the quality of wireless communication gets severely affected in an environment where multiple obstacles, such as buildings and trees, are present, and thus, communication coverage is typically limited to line of sight (LOS). In order to maintain a high-quality communication link, reconfigurable intelligent surfaces (RIS) can help by providing a secondary LOS. RIS is a specially designed periodic structure that can be reconfigured to reflect the EM signal in the desired direction. With the help of RIS, the wireless environment can become controllable and programmable, and can thus bring unprecedented new opportunities for mm-Wave wireless communication systems. Despite the growing interest in RIS, and a lot of theoretical work reported by the communication society, there is still a dearth of published works demonstrating practical implementations and experimental results. This is particularly true for experimental demonstrations of wideband RIS covering complete mm-wave 5G and beyond bands. In this talk, first, fundamental concepts related to RIS are introduced, and then EM design, prototyping steps and complete experimental characterization of a wideband RIS is shown that covers the mmWave 5G band (22.5 – 29.5 GHz (~27% bandwidth)), with a beam scanning capability of 50°. With low cost and volume manufacturing in mind, another wideband mm-Wave RIS design is presented which is fully screen-printed. This design uses novel printed switches based on Vanadium-di-oxide phase change material. Finally, an RIS design realized through an optically transparent metallic ink is shown.
Date and Time
Location
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- Date: 26 May 2025
- Time: 06:00 AM UTC to 08:00 AM UTC
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- Room117, Zhixin Building,
- No. 4800 Cao'an Road
- Shanghai, Shanghai
- China 201800
- Starts 18 May 2025 04:00 PM UTC
- Ends 26 May 2025 04:00 PM UTC
- No Admission Charge
Speakers
Atif Shamim
Prof. Atif Shamim
Atif Shamim is a distinguished professor in electrical engineering. He obtained his MS and PhD degrees from Carleton University in Canada in 2004 and 2009 respectively. He has held prestigious positions such as an NSERC Alexander Graham Bell Graduate scholar and an NSERC postdoctoral Fellow. Since joining King Abdullah University of Science & Technology (KAUST) in 2010, he has been a full professor and principal investigator of the IMPACT Lab. His research has earned a multitude of awards, including best paper awards at various IEEE conferences and competitions. He has also been recognized for his innovative work in sensors for the oil industry and wireless dosimeters. With a prolific publication record of nearly 400 papers and 35 patents, he is a Fellow of IEEE and has actively contributed to the editorial boards of several IEEE journals. His research focuses on innovative antenna designs and their integration with circuits and sensors for flexible and wearable wireless sensing systems.