A Dual-Band Polarization-Insensitive Frequency Selective Surface for Electromagnetic Shielding Applications

Area of Science:

• Electromagnetics
• Materials Science

Background:

• Electromagnetic interference (EMI) and radio frequency (RF) interference pose challenges in modern electronic systems.
• Effective shielding solutions are crucial for maintaining signal integrity and device performance.

Purpose of the Study:

• To develop a novel, compact, and polarization-insensitive dual-band frequency-selective surface (FSS) for electromagnetic shielding.
• To achieve effective shielding in both X- and Ku-bands simultaneously.

Main Methods:

• Design of a miniaturized FSS unit cell comprising modified Jerusalem crossed and corner-modified square loops.
• Co-planar arrangement of FSS elements on a single-layer Rogers 5880 substrate.
• Modeling the FSS using an equivalent lumped circuit for electromagnetic wave suppression analysis.

Main Results:

• Demonstration of polarization-independent and angularly stable band-reject filter characteristics.
• Achieved virtuous attenuation in both X- and Ku-bands for TE and TM polarizations.
• Simulated and measured results showed good agreement, validating the FSS design.

Conclusions:

• The proposed FSS offers a promising solution for dual-band RF shielding and isolation.
• The design's polarization independence and angular stability enhance its applicability in diverse environments.
• The validated FSS design can be utilized in various RF shielding and isolation applications.