ECCOSORB GDS ECCOSORB GDS High-Loss Silicone Rubber Sheet Material Characteristics Typical Properties Thin, flexible, electrically non-conductive silicone Electrical Properties taken at 8.6 GHz rubber sheet Service Temperature Cryogenic to 350F Frequency range from 6 - 35 GHz (177C) Does not support fungal growth per MIL-STD-810E Impervious to moisture and can be subjected to Fire Retardancy UL-94 V1 moisture with no adverse effects Specific Gravity (g/cc) 3.6 Low out-gassing properties for space applications Can be cut and fitted to compound curves 11 Volume Resistivity >10 ohm-cm Hardness, Shore A >70 Applications %TML (with SS6M) 0.2 (0.33) When placed within a cavity ECCOSORB GDS has %CVCM (with SS6M) 0.081 (0.09) proven to be very effective at dampening resonances due to the absorbers high permittivity and permeability Dielectric Constant e 13 When bonded to a metal surface, ECCOSORB GDS will significantly reduce the reflectivity of metal objects Dielectric Loss Tangent, tan 0.2 d or structures due to the flow of microwave currents on that surface Magnetic Permeability, 1.7 It can be applied to antenna elements, microwave Magnetic Loss Tangent, tan 0.78 m dishes, the inner or outer surfaces of waveguides for isolation, attenuation, or modification of radiating 2 2 Weight, lbs/ft (kg/m) 0.6 (2.92) patterns. 2 2 When applied to side or even rear surfaces of certain Weight, lbs/ft (kg/m ) with SS6M PSA 0.7 (3.41) objects, ECCOSORB GDS will cause a significant reduction in head on reflectivity or backscattering. Although not intended as a specular absorber, it will Availability reduce metal plate reflectivity by a few dB. 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 Instructions for Use It can be supplied with a Pressure Sensitive Adhesive ECCOSORB GDS should be bonded to a metal surface (PSA). Product designation denoting ECCOSORB for optimal reflectivity performance. If a metal surface GDS with a PSA is ECCOSORB GDS/SS6M is not available, it can be supplied upon request with ECCOSORB GDS is available in other sizes and an aluminum foil backing (ML) designated as GDS/ML customer specified configurations and thicknesses Attenuation 70 60 50 40 30 20 10 0 1 2 3 4 5 6 7 8 9 101112131415161718 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: 5/11/07 www.eccosorb.com A9 dB/cm