ECCOSORB
®
GDS
High-Loss Silicone Rubber Sheet
Material Characteristics
•
•
•
•
•
•
Thin, flexible, electrically non-conductive silicone
rubber sheet
Frequency range from 6 - 35 GHz
Does not support fungal growth per MIL-STD-810E
Impervious to moisture and can be subjected to
moisture with no adverse effects
Low out-gassing properties for space applications
Can be cut and fitted to compound curves
Typical Properties
Electrical Properties taken at 8.6 GHz
Service Temperature
Specific Gravity (g/cc)
Volume Resistivity
Hardness, Shore A
%TML (with SS6M)
Cryogenic to 350°F
(177°C)
3.6
>10
11
ohm-cm
>70
0.2 (0.33)
0.081 (0.09)
13
0.2
1.7
0.78
0.6 (2.92)
0.7 (3.41)
Applications
•
When placed within a cavity ECCOSORB
®
GDS has
proven to be very effective at dampening resonances
due to the absorbers high permittivity and permeability
When bonded to a metal surface, ECCOSORB
®
GDS
will significantly reduce the reflectivity of metal objects
or structures due to the flow of microwave currents on
that surface
It can be applied to antenna elements, microwave
dishes, the inner or outer surfaces of waveguides for
isolation, attenuation, or modification of radiating
patterns.
When applied to side or even rear surfaces of certain
objects, ECCOSORB
®
GDS will cause a significant
reduction in “head on” reflectivity or backscattering.
Although not intended as a specular absorber, it will
reduce metal plate reflectivity by a few dB.
%CVCM (with SS6M)
Dielectric Constant e’
Dielectric Loss Tangent, tan δ
d
Magnetic Permeability, µ’
Magnetic Loss Tangent, tan δ
m
Weight, lbs/ft
2
(kg/m
2
)
Weight, lbs/ft
2
(kg/m
2
) with SS6M PSA
•
•
•
•
Availability
•
•
ECCOSORB
®
GDS is available in sheets 0.030” x 12” x
12” (0.076 cm x 30.5 cm x 30.5 cm)
Upon special request, ECCOSORB
®
GDS can be
supplied in sheets up to 36” (914.4mm) in length
It can be supplied with a Pressure Sensitive Adhesive
(PSA).
Product designation denoting ECCOSORB
®
GDS with a PSA is ECCOSORB
®
GDS/SS6M
ECCOSORB
®
GDS is available in other sizes and
customer specified configurations and thicknesses
upon request
Instructions for Use
•
ECCOSORB GDS should be bonded to a metal surface
for optimal
reflectivity
performance. If a metal surface
is not available, it can be supplied upon request with
an aluminum foil backing (ML) designated as GDS/ML
®
•
•
Attenuation
70
60
50
40
30
20
10
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16 17 18
dB/cm
Frequency (GHz)
EMERSON & CUMING MICROWAVE PRODUCTS, INC., 28 York Avenue, Randolph, MA 02368 / Telephone (781) 961-9600. Use of Information and Material: Values shown are based on testing of laboratory test specimens and represent data that
falls within normal range of the material. These values are not intended for use in establishing maximum, minimum or ranges of values for specification purposes. Any determination of the suitability of the material for any purpose
contemplated by the user and the manner of such use is the responsibility of the user. The user should determine that the material meets the needs of the user's product and use. We hope that the information given here will be helpful. It is
based on data and knowledge considered to be true and accurate and is offered for the user's consideration, investigation and verification but we do not warrant the results to be obtained. Please read all statements, recommendations or
suggestions in conjunction with our conditions of sale INCLUDING THOSE LIMITING WARRANTIES AND REMEDIES, which apply to all goods supplied by us. We assume no responsibility for the use of these statements, recommendations or
suggestions nor do we intend them as a recommendation for any use, which would infringe any patent or copyright. Emerson & Cuming Microwave Products Inc.
Revision: 11/23/15
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