ORBIT FR AES Series-Lossy Dielectric Slab Material - Manual (Page 2)

AEMI TECHNICAL BULLETIN AES/AEPF SERIES
PAGE 2
3.0
MECHANICAL PROPERTIES
3.1 Thickness
The AES Series material can be provided in any thickness up to 4".
Thicker materials are glued with a non-f1ammable adhesive. The tolerances that
can be achieved in cutting are typically plus or minus 1/16". Upon request, closer
tolerances can be achieved with the use of additional tooling.
3.2 Planar Dimensions
The AES Series material is provided in standard 24” x 24” sheets. Larger sheets are
available up to 30” x 48”
3.3 Density
Material density will depend on the 1oading and may vary
from 3 to 5 lb/cu.ft.
3.4 Homogeneity
The properties of the carbon impregnation mix will provide even dielectric
properties throughout the planar area of the absorber. The product will be
smooth and homogeneous in texture throughout it’s bulk.
3.5 Foam characteristics
The base foam has a predominately open cell structure and is a polyurethane foam..
Its basic flammable character is modified by the addition of a number of chemicals
and it passes NRL 8093 tests 1, 2, & 3.
3.6 Material Use
The customer application will define the supply shape. It can be readily cut by
scissors in thin layers and with a small bandsaw or similar when thicker. Small
pieces can be straight forwardly cut using a shape blade.
4.0
ELECTRICAL PROPERTIES
This material exhibits a variable insertion loss when measured at 1.5 GHz using
appropriate antennas. The designation of the carbon loading (active lossy
ingredient) is as denoted with the insertion loss in dB for a 1/2 inch thickness
tabulated. Other thickness values change in direct proportion to thickness.: