Angle-Dependent Phase Shifter Model for Reconfigurable Intelligent Surfaces: Does the Angle-Reciprocity Hold?

被引：50

作者：

Chen, Weicong ^{[1
]}

Bai, Lin ^{[2
]}

Tang, Wankai ^{[1
]}

Jin, Shi ^{[1
]}

Jiang, Wei Xiang ^{[2
]}

Cui, Tie Jun ^{[2
]}

机构：

[1] Southeast Univ, Natl Mobile Commun Res Lab, Nanjing 210096, Peoples R China

[2] Southeast Univ, State Key Lab Millimeter Waves, Nanjing 210096, Peoples R China

来源：

IEEE COMMUNICATIONS LETTERS | 2020年 / 24卷 / 09期

基金：

美国国家科学基金会;

关键词：

Phase shifters; Integrated circuit modeling; Wireless communication; Equivalent circuits; Surface waves; Varactors; Impedance; Reconfigurable intelligent surface; phase shifter model; angle-dependent; angle-reciprocity; PROGRAMMABLE METASURFACE; WIRELESS COMMUNICATIONS;

D O I：

10.1109/LCOMM.2020.2993961

中图分类号：

TN [电子技术、通信技术];

学科分类号：

0809 ;

摘要：

The existing phase shifter models adopted for reconfigurable intelligent surfaces (RISs) have ignored the electromagnetic (EM) waves propagation behavior, thus cannot reveal practical effects of RIS on wireless communication systems. Based on the equivalent circuit, this letter introduces an angle-dependent phase shifter model for varactor-based RISs. To the best of our knowledge, this is the first phase shifter model which reveals that the incident angle of EM waves has influence on the reflection coefficient of RIS. In addition, the angle-reciprocity on RIS is investigated and further proved to be tenable when the reflection phase difference of adjacent RIS unit cells is invariant for an impinging EM wave and its reverse incident one. The angle-dependent characteristic of RIS is verified through full-wave simulation. According to our analysis and the simulation results, we find that the angle-reciprocity of varactor-based RIS only holds under small incident angles of both forward and reverse incident EM waves, thus limits the channel reciprocity in RIS-assisted TDD systems.

引用

页码：2060 / 2064

页数：5

共 16 条

[1]

[Anonymous], 2012, Microwave Engineering

[2] Direct Transmission of Digital Message via Programmable Coding Metasurface [J].

Cui, Tie Jun ;

Liu, Shuo ;

Bai, Guo Dong ;

Ma, Qian .

RESEARCH, 2019, 2019

[3] Smart radio environments empowered by reconfigurable AI meta-surfaces: an idea whose time has come [J].

Di Renzo, Marco ;

Debbah, Merouane ;

Dinh-Thuy Phan-Huy ;

Zappone, Alessio ;

Alouini, Mohamed-Slim ;

Yuen, Chau ;

Sciancalepore, Vincenzo ;

Alexandropoulos, George C. ;

Hoydis, Jakob ;

Gacanin, Haris ;

de Rosny, Julien ;

Bounceur, Ahcene ;

Lerosey, Geoffroy ;

Fink, Mathias .

EURASIP JOURNAL ON WIRELESS COMMUNICATIONS AND NETWORKING, 2019, 2019 (1)

[4]

Gong S., 2019, ARXIV191207794

[5] Large Intelligent Surface-Assisted Wireless Communication Exploiting Statistical CSI [J].

Han, Yu ;

Tang, Wankai ;

Jin, Shi ;

Wen, Chao-Kai ;

Ma, Xiaoli .

IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, 2019, 68 (08) :8238-8242

[6] Reconfigurable Intelligent Surfaces for Energy Efficiency in Wireless Communication [J].

Huang, Chongwen ;

Zappone, Alessio ;

Alexandropoulos, George C. ;

Debbah, Merouane ;

Yuen, Chau .

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, 2019, 18 (08) :4157-4170

[7]

Taha A., 2019, ARXIV190410136

[8]

Tang W., 2019, ARXIV191105326, V2019

[9] Wireless Communications with Programmable Metasurface: New Paradigms, Opportunities, and Challenges on Transceiver Design [J].

Tang, Wankai ;

Chen, Ming Zheng ;

Dai, Jun Yan ;

Zeng, Yong ;

Zhao, Xinsheng ;

Jin, Shi ;

Cheng, Qiang ;

Cui, Tie Jun .

IEEE WIRELESS COMMUNICATIONS, 2020, 27 (02) :180-187

[10]

Tang WK, 2019, CHINA COMMUN, V16, P46, DOI 10.12676/j.cc.2019.05.004

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