A Novel Design of Varactor-Based RIS: Achieving Low-Profile, Wideband, and Continuous Phase Control

Yikun Li; Yufei Zhao; Chau Yuen; Xiong Qin; Christ Clenson; Chao Du; Yong Liang Guan

doi:10.1109/LAWP.2025.3580590

A Novel Design of Varactor-Based RIS: Achieving Low-Profile, Wideband, and Continuous Phase Control

Yikun Li, Yufei Zhao^*, Chau Yuen, Xiong Qin, Christ Clenson, Chao Du, Yong Liang Guan

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

This letter presents a novel Reconfigurable Intelligent Surface (RIS) that features a low-profile structure, wide operating bandwidth, and continuous phase control. By incorporating a middle patch layer without introducing an additional air gap, the proposed design maintains a low-profile property, while achieving a smooth 360° phase shift over 10% bandwidth at 6 GHz with excellent reflection. A fabricated 10x10 RIS array exhibits stable performance, enabling precise beam control across a 600 MHz bandwidth. These results highlight the potential of the proposed low-profile, wideband RIS with continuous phase tuning for next-generation wireless communication systems.

Original language	English
Journal	IEEE Antennas and Wireless Propagation Letters
DOIs	https://doi.org/10.1109/LAWP.2025.3580590
Publication status	Accepted/In press - 2025
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2002-2011 IEEE.

ASJC Scopus Subject Areas

Electrical and Electronic Engineering

Keywords

Continuous phase shifting
low-profile
reconfigurable intelligent surface
sub- wavelength
wideband

Access to Document

10.1109/LAWP.2025.3580590

Cite this

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title = "A Novel Design of Varactor-Based RIS: Achieving Low-Profile, Wideband, and Continuous Phase Control",

abstract = "This letter presents a novel Reconfigurable Intelligent Surface (RIS) that features a low-profile structure, wide operating bandwidth, and continuous phase control. By incorporating a middle patch layer without introducing an additional air gap, the proposed design maintains a low-profile property, while achieving a smooth 360° phase shift over 10\% bandwidth at 6 GHz with excellent reflection. A fabricated 10x10 RIS array exhibits stable performance, enabling precise beam control across a 600 MHz bandwidth. These results highlight the potential of the proposed low-profile, wideband RIS with continuous phase tuning for next-generation wireless communication systems.",

keywords = "Continuous phase shifting, low-profile, reconfigurable intelligent surface, sub- wavelength, wideband",

author = "Yikun Li and Yufei Zhao and Chau Yuen and Xiong Qin and Christ Clenson and Chao Du and Guan, \{Yong Liang\}",

note = "Publisher Copyright: {\textcopyright} 2002-2011 IEEE.",

year = "2025",

doi = "10.1109/LAWP.2025.3580590",

language = "English",

journal = "IEEE Antennas and Wireless Propagation Letters",

issn = "1536-1225",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

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T1 - A Novel Design of Varactor-Based RIS

T2 - Achieving Low-Profile, Wideband, and Continuous Phase Control

AU - Li, Yikun

AU - Zhao, Yufei

AU - Yuen, Chau

AU - Qin, Xiong

AU - Clenson, Christ

AU - Du, Chao

AU - Guan, Yong Liang

PY - 2025

Y1 - 2025

N2 - This letter presents a novel Reconfigurable Intelligent Surface (RIS) that features a low-profile structure, wide operating bandwidth, and continuous phase control. By incorporating a middle patch layer without introducing an additional air gap, the proposed design maintains a low-profile property, while achieving a smooth 360° phase shift over 10% bandwidth at 6 GHz with excellent reflection. A fabricated 10x10 RIS array exhibits stable performance, enabling precise beam control across a 600 MHz bandwidth. These results highlight the potential of the proposed low-profile, wideband RIS with continuous phase tuning for next-generation wireless communication systems.

AB - This letter presents a novel Reconfigurable Intelligent Surface (RIS) that features a low-profile structure, wide operating bandwidth, and continuous phase control. By incorporating a middle patch layer without introducing an additional air gap, the proposed design maintains a low-profile property, while achieving a smooth 360° phase shift over 10% bandwidth at 6 GHz with excellent reflection. A fabricated 10x10 RIS array exhibits stable performance, enabling precise beam control across a 600 MHz bandwidth. These results highlight the potential of the proposed low-profile, wideband RIS with continuous phase tuning for next-generation wireless communication systems.

KW - Continuous phase shifting

KW - low-profile

KW - reconfigurable intelligent surface

KW - sub- wavelength

KW - wideband

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M3 - Article

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SN - 1536-1225

JO - IEEE Antennas and Wireless Propagation Letters

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ER -

A Novel Design of Varactor-Based RIS: Achieving Low-Profile, Wideband, and Continuous Phase Control

Abstract

Bibliographical note

ASJC Scopus Subject Areas

Keywords

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