Antenna and Array Technologies for Future Wireless Ecosystems

6Terahertz Lens Antennas

Geng‐Bo Wu¹, Kwun Wing Cheung¹, Ka Fai Chan¹ and Chi Hou Chan^1,2

¹State Key Laboratory of Terahertz and Millimeter Waves, (City University of Hong Kong), Lau Ming Wai Academic Building, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, 999077, China

²City University of Hong Kong, Department of Electrical Engineering, Yeung Kin Man Academic Building, 83 Tat Chee Avenue, Kowloon, Hong Kong, SAR, 999077, China

6.1 Introduction

While global commercialization of 5G is gradually taking off, many large‐scale initiatives on defining the performance requirements and technological challenges for future 6G wireless communications are already in place. One example is the eight‐year, €250 million 6G Flagship program established in 2018 by the Academy of Finland. The program is hosted by the University of Oulu and it published the first white paper on 6G in September 2019. It envisages that by 2030, our society will be “data‐driven, enabled by near instant unlimited wireless connectivity” via 6G [1, 2]. “Beam me up, Scotty” may become a reality through telepresence and mixed reality enabled by ultrahigh‐speed communications, and high‐resolution 3D imaging and sensing. The terabit‐per‐second rates and microsecond latencies in 6G are achieved through the advancements in data collection, processing, transmission, and networking. The supported link distance for 0.3–3 THz is less than 10 m and the system bandwidth is up to 300 GHz [2].

In the seminal review article published ...