Affordable Access

Publisher Website

Computational method for radar absorbing composite lattice grids

Authors
Journal
Computational Materials Science
0927-0256
Publisher
Elsevier
Publication Date
Volume
46
Issue
3
Identifiers
DOI: 10.1016/j.commatsci.2008.12.011
Keywords
  • Lattice Grid
  • Radar Absorbing Structure
  • Method Of Moment
  • Reflection Coefficient
  • Total Reflection Backing
  • Grating Lobe
Disciplines
  • Computer Science
  • Design

Abstract

Abstract Composite lattice grids reinforced by glass fibers (GFRC) and carbon fibers (CFRC) filled with spongy materials can be designed as lightweight radar absorbing structures (RAS). In the present paper, a computational approach based on periodic moment method (PMM) has been developed to calculate reflection coefficients of radar absorbing composite lattice grids. Total reflection backing (TRB) is considered directly in our PMM program by treating it as a dielectric material with large imaginary part of permittivity. Two different mechanisms of reflection reduction for radar absorbing lattice grids are revealed. At low frequency, reflection coefficients increase with the volume fraction of the grid cell wall. At high frequency, several grating lobes propagate away from the doubly periodic plane, and reflection coefficients depend on both the cell wall volume fraction and interelement distance.

There are no comments yet on this publication. Be the first to share your thoughts.