Omni-directional selective shielding material based on amorphous glass coated microwires

Area of Science:

• Materials Science
• Electromagnetics
• Applied Physics

Background:

• Microwave shielding is crucial for protecting electronic devices and systems.
• Amorphous magnetic materials offer unique electromagnetic properties.
• Selective absorption and high shielding effectiveness are desired for advanced applications.

Purpose of the Study:

• To investigate the shielding effectiveness of a novel omni-directional selective shielding material.
• To explore the microwave absorption characteristics of CoFe-glass coated amorphous wires.
• To determine the influence of material design on shielding performance.

Main Methods:

• Measurements were conducted using a TEM cell for controlled medium testing.
• Free space measurements were performed utilizing horn antennas.
• The composite material's structure was varied by controlling microwire layers and length.

Main Results:

• The CoFe-glass coated amorphous wire composite exhibits tunable shielding effectiveness.
• Selective absorption within the 0.8 GHz-3 GHz microwave frequency range was achieved.
• Shielding performance can be optimized by adjusting the number of layers and microwire length.

Conclusions:

• The developed composite shielding material offers controllable shielding effectiveness and selective microwave absorption.
• This material shows potential for applications requiring tailored electromagnetic interference (EMI) shielding.
• Material design parameters, such as layer count and microwire dimensions, are key for performance optimization.