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Updated: May 30, 2025

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces

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Published on: June 7, 2019

Beam Scanning with Ultra-Low Sidelobes and In-Band Ultra-Low Scattering Characteristics Empowered by Single

Lixin Jiang¹, Yongfeng Li¹, Hao Yang¹

¹Shaanxi Key Laboratory of Artificially Structured Functional Materials and Devices, Airforce Engineering University, Xi'an, Shaanxi, 710051, China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)

|January 29, 2025

Summary

This study introduces a novel space-time coding metasurface for simultaneous amplitude and phase modulation. This technology enhances electromagnetic (EM) stealth and communication by reducing apertures and suppressing sideband levels.

Keywords:

radiation‐scattering space‐time‐coding metasurface

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Last Updated: May 30, 2025

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Published on: June 7, 2019

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Area of Science:

Electromagnetic Metasurfaces
Applied Electromagnetics
Stealth Technology

Background:

Integrated modulation of radiation and scattering offers potential for reduced electromagnetic (EM) apertures, enhancing communication and stealth.
Challenges persist in achieving full-polarization, arbitrary amplitude, and phase modulation of radiation scattering.

Purpose of the Study:

To propose a novel strategy for space-time coding of radiation scattering within a single frequency band.
To enable simultaneous and independent modulation of amplitude and phase for enhanced EM performance.
To address limitations of high sideband levels (SBLs) in conventional space-time-coding metasurfaces.

Main Methods:

Development of a space-time coding radiation-scattering metasurface (STCRSM) strategy.
Implementation of nonuniform modulation periods and stochastic coding to suppress SBLs.
Validation through fabrication and measurement of a prototype STCRSM.

Main Results:

Achieved beam scanning with ultra-low sidelobe levels (SLLs) and suppressed SBLs in radiation mode (RM).
Demonstrated in-band low scattering characteristics in scattering mode (SM) within the same operating frequency band.
Validated functionalities through experimental measurements.

Conclusions:

The proposed STCRSM strategy enables simultaneous amplitude and phase modulation without optimization algorithms.
The technology exhibits low SLLs and low SBLs, suitable for RF stealth applications.
Potential for widespread adoption in covert communication systems and advanced EM platforms.