Ultra-BroadBand Electromagnetic Control Using a Triple Circular Ring Metasurface: Surface Wave Propagation, Beam Steering, and RCS reduction (50-100 Ghz)

TL;DR

This paper introduces a triple circular ring metasurface capable of broadband electromagnetic control, including surface wave guidance, beam steering, and RCS reduction from 50 to 100 GHz, suitable for stealth and communication applications.

Contribution

The paper presents a novel, cost-effective triple circular ring metasurface design that achieves multifunctional electromagnetic control over a broad frequency range, outperforming conventional structures.

Findings

Strong electromagnetic reflection from 50-100 GHz with near copper performance except near 91 GHz.

Redirects incident energy toward 67 degrees while minimizing radiation in other directions.

Achieves RCS reduction from -40 dB to -30 dB across the broadband frequency range.

Abstract

Traditional metasurfaces often face challenges in achieving broadband functionality and dynamic adaptability, limiting their use in advanced electromagnetic systems. This paper presents a triple circular ring metasurface designed for multifunctional electromagnetic applications, including surface wave propagation, beam shaping, and ultra-broadband radar cross-section (RCS) reduction. The proposed structure uses a cost-effective FR-4 substrate and demonstrates strong electromagnetic reflection characteristics across 50-100 GHz. Except near 91 GHz, the metasurface exhibits amplitude and phase responses comparable to a conventional copper plate while maintaining efficient surface wave propagation. Significant electric and magnetic field amplitudes of nearly 1 V/m and 5x10^-3 A/m are sustained across the surface, unlike a standard copper plate. The metasurface also redirects incident energy toward a predefined direction of 67 degrees in the phi plane while minimizing radiation over a 360-degree angular range. In addition, it achieves a stable monostatic RCS reduction from -40 dB to -30 dB across a broad frequency range, outperforming conventional copper structures. Numerical simulations validate the proposed design. The results demonstrate strong potential for stealth technology, radar systems, and next-generation wireless communications.