Far Field Electromagnetic Interference (EMI) Shielding Using Aperture Controlled Skin Core Beads Composite
Abstract
Electromagnetic interference (EMI) shielding is the final defense for EMI problems that could impact almost all electrical and electronic systems from daily life to military activity and aerospace exploration. The Gigahertz electronic systems and telecommunication devices may disrupt proper operation of surrounding electrical equipment or cause radiative damage to living-biological species, which we have never faced so seriously before but we are facing now. Particularly, the antenna and stealth systems in military applications require advanced EMI shielding (or radar absorbing) materials, where the I-J Band (8 to 12 GHz) is a relatively popular radar band like airborne radars for performing the roles of interceptor, fighter, and attack of enemy fighters and of ground targets. Currently most common way for EMI shieling is by reflection utilizing metallic sheets in both near field (or induction) and far field (or radiation) regions. In the development of stealth systems, for example, we believe that the metallic material can be used but it should satisfy the crucial requirement of design flexibility that manifest the diffuse reflection for redircting the incident radar waves. As we propose herein, the diffuse reflection metallic materials may be accompanied with the wave absorption materials like carbon based CNT or graphene as a composite form, which could subsequently absorb the diffusion reflected waves for complete elimination of incident radar waves. The collective combination of these two diffuse reflecting and absorbing materials may efficiently prevent radar tracking when these two materials are assembled in a specific composite structure that could maximize the stealth capability.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jan 14, 2022
- Source ID
- FA23861914056XX0
Entities
People
- Jae Do Nam
Organizations
- Air Force Office of Scientific Research
- Sungkyunkwan University
- United States Air Force