Overview
The SFC-EM product is similar to standard CRAM SFC pyramidal grades, but the tips of the pyramids are truncated. This saves space in small chambers and provides a more rugged product, eliminating the possibility of tip breakage.
C-RAM SFC EM products are specifically optimized for low frequency applications and are used mainly in chambers used for emissions and immunity testing.
C-RAM SFC-24 EM meets the requirements for MIL-STD 461/462D.
C-RAM SFC-36 EM and C-RAM SFC-24 EM, in an appropriate combination in a chamber, are an ideal absorber treatment for Immunity Test Chambers (EN 1000-4-3 and equivalent specifications).
Typically, C-RAM SFC absorbers can handle up to 1.25 W/in2 (2 kW/m2) of RF energy in a temperature controlled room, but this is dependent upon frequency and application.
All C-RAM SFC-XX EM products are manufactured and supplied as 24 in. x 24 in. panels. The product has all the favorable features of the standard SFC products, including a high level of fire retardancy meeting NRL 8093 Test 1, 2 and 3, MS-8-21 Test 1, 2 and 3 and T.I. drawing 2693066, as well as ASTM E-84-97 Class A.
PHYSICAL CHARACTERISTICS AND TYPICAL REFLECTIVITY AT NORMAL INCIDENCE | |||||||
GRADE | Height in. (mm) | Weight lbs. (kg) | Reflectivity (MHz) | ||||
80 | 250 | 500 | 1000 | 10,000 | |||
SFC-24EM | 20 (510) | 17 (7.7) | -8 | -24 | -35 | -38 | <-40 |
SFC-36EM | 31 (760) | 25 (11.4) | 13 | 29 | -37 | -40 | <-40 |
SFC-48EM | 42 (1067) | 35 (16) | 16 | -32 | -39 | <-40 | <-40 |