STAR-RIS for simultaneous communications and fourier-based AoA sensing: design and experimentation

Zahra  Rahimian Omam; Amirmasood Bagheri; Shadi  Danesh; Seyed  Ehsan Hosseininejad; Okan Yurduseven; George C.  Alexandropoulos; Mohsen  Khalily

STAR-RIS for simultaneous communications and fourier-based AoA sensing: design and experimentation

Zahra Rahimian Omam
, Amirmasood Bagheri
, Shadi Danesh
, Seyed Ehsan Hosseininejad
, Okan Yurduseven
, George C. Alexandropoulos
, Mohsen Khalily

School of Electronics, Electrical Engineering and Computer Science

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

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Abstract

This paper presents a dual-functional Simultaneous Transmission and Reflection Reconfigurable Intelligent Surface (STAR-RIS) that enables concurrent control of electromagnetic (EM) waves and computational tasks within a single aperture, addressing emerging connect-and-compute requirements in next generation wireless systems. The proposed STAR unit cell employs a polarization-converting approach to achieve simultaneous amplitude and phase control in both transmission and reflection modes. The STAR-RIS design integrates holographic beamforming for communications alongside Fourier transform (FT) functionality for angle-of-arrival (AoA) sensing. It employs a coding metasurface with a linear phase gradient in its reflecting elements and a lens phase profile in its transmitting elements. A prototype with side-by-side reflection and transmission arrays is designed, fabricated, and experimentally tested at 26 GHz, demonstrating ±45∘ tilt-angle beams in the reflection for communications and EM wave focusing in the transmission space for AoA sensing.

Original language	English
Number of pages	5
Journal	IEEE Antennas and Wireless Propagation Letters
Early online date	04 Jun 2025
Publication status	Early online date - 04 Jun 2025

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STAR-RIS for simultaneous communications and fourier-based AoA sensing: design and experimentation
Copyright 2025 the authors. This is an accepted manuscript distributed under a Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.
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Cite this

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title = "STAR-RIS for simultaneous communications and fourier-based AoA sensing: design and experimentation",

abstract = "This paper presents a dual-functional Simultaneous Transmission and Reflection Reconfigurable Intelligent Surface (STAR-RIS) that enables concurrent control of electromagnetic (EM) waves and computational tasks within a single aperture, addressing emerging connect-and-compute requirements in next generation wireless systems. The proposed STAR unit cell employs a polarization-converting approach to achieve simultaneous amplitude and phase control in both transmission and reflection modes. The STAR-RIS design integrates holographic beamforming for communications alongside Fourier transform (FT) functionality for angle-of-arrival (AoA) sensing. It employs a coding metasurface with a linear phase gradient in its reflecting elements and a lens phase profile in its transmitting elements. A prototype with side-by-side reflection and transmission arrays is designed, fabricated, and experimentally tested at 26 GHz, demonstrating ±45∘ tilt-angle beams in the reflection for communications and EM wave focusing in the transmission space for AoA sensing.",

author = "\{Rahimian Omam\}, Zahra and Amirmasood Bagheri and Shadi Danesh and \{Ehsan Hosseininejad\}, Seyed and Okan Yurduseven and Alexandropoulos, \{George C.\} and Mohsen Khalily",

year = "2025",

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language = "English",

journal = "IEEE Antennas and Wireless Propagation Letters",

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AU - Rahimian Omam, Zahra

AU - Bagheri, Amirmasood

AU - Danesh, Shadi

AU - Ehsan Hosseininejad, Seyed

AU - Yurduseven, Okan

AU - Alexandropoulos, George C.

AU - Khalily, Mohsen

PY - 2025/6/4

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N2 - This paper presents a dual-functional Simultaneous Transmission and Reflection Reconfigurable Intelligent Surface (STAR-RIS) that enables concurrent control of electromagnetic (EM) waves and computational tasks within a single aperture, addressing emerging connect-and-compute requirements in next generation wireless systems. The proposed STAR unit cell employs a polarization-converting approach to achieve simultaneous amplitude and phase control in both transmission and reflection modes. The STAR-RIS design integrates holographic beamforming for communications alongside Fourier transform (FT) functionality for angle-of-arrival (AoA) sensing. It employs a coding metasurface with a linear phase gradient in its reflecting elements and a lens phase profile in its transmitting elements. A prototype with side-by-side reflection and transmission arrays is designed, fabricated, and experimentally tested at 26 GHz, demonstrating ±45∘ tilt-angle beams in the reflection for communications and EM wave focusing in the transmission space for AoA sensing.

AB - This paper presents a dual-functional Simultaneous Transmission and Reflection Reconfigurable Intelligent Surface (STAR-RIS) that enables concurrent control of electromagnetic (EM) waves and computational tasks within a single aperture, addressing emerging connect-and-compute requirements in next generation wireless systems. The proposed STAR unit cell employs a polarization-converting approach to achieve simultaneous amplitude and phase control in both transmission and reflection modes. The STAR-RIS design integrates holographic beamforming for communications alongside Fourier transform (FT) functionality for angle-of-arrival (AoA) sensing. It employs a coding metasurface with a linear phase gradient in its reflecting elements and a lens phase profile in its transmitting elements. A prototype with side-by-side reflection and transmission arrays is designed, fabricated, and experimentally tested at 26 GHz, demonstrating ±45∘ tilt-angle beams in the reflection for communications and EM wave focusing in the transmission space for AoA sensing.

M3 - Article

SN - 1536-1225

JO - IEEE Antennas and Wireless Propagation Letters

JF - IEEE Antennas and Wireless Propagation Letters

ER -

STAR-RIS for simultaneous communications and fourier-based AoA sensing: design and experimentation

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