A 1-bit Time-Modulated Reflectarray for Reconfigurable-Intelligent-Surface Applications

被引：37
作者：
Cao, Xianbo [1 ]
Chen, Qiang [1 ]
Tanaka, Toru [2 ]
Kozai, Masaki [2 ]
Minami, Hiroya [2 ]
机构：
[1] Tohoku Univ, Dept Commun Engn, Sendai 9808579, Japan
[2] NTT Corp, NTT Space Environm & Energy Labs, Tokyo 1808585, Japan
来源：
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION | 2023年 / 71卷 / 03期
基金：
日本科学技术振兴机构;
关键词：
1-bit; reconfigurable intelligent surface (RIS); reflectarray (RA); time-modulated array (TMA); ANTENNA; DESIGN; PHASE; AMPLITUDE; ARRAYS;
D O I：
10.1109/TAP.2022.3233659
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The development of reconfigurable intelligent surfaces (RISs) is important to facilitate advances in beyond 5G and 6G technologies. However, the difficulty of controlling the reflected amplitude of the widely studied 1-bit reflectarray (RA) makes it difficult to meet the requirements of RIS for multiple application scenarios, and the change of the operating frequency in emerging time modulation (TM) technology-based RAs makes them unsuited to existing systems. Considering the observed the intrinsic similarities between the reflection states of 1-bit RA and logic states of 1-bit time function, a 1-bit time-modulated RA (1-bit TMRA) was designed based on a conventional 1-bit RA and TM technology in this study, and then was verified experimentally. The 1-bit RA characteristic was verified by realizing beam scanning, and the TM characteristic was verified by a shaping scattering pattern with ultralow sidelobe levels (SLLs). The results show that the proposed 1-bit TMRA is capable of realizing an extra TM characteristic without significantly increasing the system complexity of the 1-bit RA. Unlike most time-modulated arrays, the proposed 1-bit TMRA operates at the center frequency, making it suitable for direct application in existing wireless communication systems. These advantages highlight the potential of the proposed 1-bit TMRA for practical applications in RISs.
引用
收藏
页码：2396 / 2408
页数：13
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