Multifunctional Coding-Feeding Metasurface Based on Phase Manipulation

Area of Science:

• Metasurfaces
• Electromagnetics
• Antenna Engineering

Background:

• Metasurfaces (MSs) require multiple functionalities on a shared aperture for diverse applications.
• Existing metasurface designs often face limitations in integrating multiple functions efficiently.

Purpose of the Study:

• To propose and validate a novel coding-feeding metasurface (CFMS) integrating high-gain radiation, orbital angular momentum (OAM) generation, and radar cross-section (RCS) reduction.
• To demonstrate the feasibility of achieving these multiple functionalities through phase manipulation on a shared aperture.

Main Methods:

• Design of a CFMS unit cell comprising a rectangular emission patch and two quasi-Minkowski patches for reflective phase manipulation.
• Rational configuration of elements and excitation phases to achieve high-gain radiation and multiple OAM modes (±1, ±2, ±3).
• Implementation of phase interference techniques for broadband and dual-band RCS reduction.

Main Results:

• Successful demonstration of high-gain radiation and generation of OAM modes ±1, ±2, and ±3.
• Achieved 8 dB broadband RCS reduction from 3.18 GHz to 7.56 GHz for y-polarization and dual-band RCS reduction for x-polarization.
• Experimental measurements of a fabricated prototype closely matched simulation results, validating the CFMS concept.

Conclusions:

• The proposed CFMS effectively integrates high-gain radiation, OAM generation, and RCS reduction on a shared aperture.
• The CFMS exhibits advantages of light weight and low profile, making it suitable for stealth aircraft applications in detection and wireless communication.