Cuming Hybrid RF & Microwave Absorber For Ferrite Tile
C-RAM HFP HYBRID WIDEBAND RF ABSORBER 30 MHz - 40 GHz	C-RAM HFP is a hybrid RF absorber designed for low-frequency EMC test rooms and anechoic chambers. The hybrid construction consists of specially-formulated urethane foam pyramidal or wedge absorber panels mounted on top of ferrite tiles, resulting in almost all the performance normally seen with ferrite tiles alone in the 30 - 1000 MHz range, plus up to -30dB reflectivity from 1 - 20GHz. For many testing applications, C-RAM HFP achieves comparable performance in less than half the volume occupied by conventional pyramidal absorbers. One should note that the pyramidal foam component of C-RAM HFP is specially designed to match the impedance of the FT-10 ferrite tiles, and is not the same material as standard C-RAM SFC pyramidal foam absorbers. Customers can discuss application details with Cuming Microwave engineers to arrive at an optimal solution for their application.

Cuming Hybrid RF & Microwave Absorber For Ferrite Tile

C-RAM HFP

HYBRID WIDEBAND RF ABSORBER

30 MHz - 40 GHz

C-RAM HFP is a hybrid RF absorber designed for low-frequency EMC test rooms and anechoic chambers. The hybrid construction consists of specially-formulated urethane foam pyramidal or wedge absorber panels mounted on top of ferrite tiles, resulting in almost all the performance normally seen with ferrite tiles alone in the 30 - 1000 MHz range, plus up to -30dB reflectivity from 1 - 20GHz. For many testing applications, C-RAM HFP achieves comparable performance in less than half the volume occupied by conventional pyramidal absorbers.

One should note that the pyramidal foam component of C-RAM HFP is specially designed to match the impedance of the FT-10 ferrite tiles, and is not the same material as standard C-RAM SFC pyramidal foam absorbers. Customers can discuss application details with Cuming Microwave engineers to arrive at an optimal solution for their application.

TYPICAL DIMENSIONS REFLECTIVITY PERFORMANCE in dB (SFC-HFP)
Model	Height in. (mm)	Weight lb. (kg)	Tips Per Piece	30MHz	100MHz	300MHz	1GHz	3GHz	10+GHz
HFP-12 Pyramidal	13 (330)	50 (23)	36	12	17	16	10	10	17
HFP-18 Wedge	18 (457)	55 (25)	3	15	18	20	13	12	17
HFP-24 Wedge	26 (660)	58 (26)	3	15	18	20	15	12	17
HFP-36 Pyramidal	38 (965)	60 (27)	4	20	24	23	18	20	30
HFP-48 Pyramidal	50 (1270)	66 (30)	4	22	24	25	23	25	30
HFP-72 Wedge	72 (1828)	70 (32)	1	24	25	26	27	27	30

Cuming Ferrite Tile RF Absorber
C-RAM FT-10 THIN CERAMIC FERRITE TILE RF ABSORBER FERRITE TILE 10 MHz - 2 GHz	C-RAM FT-10 is a thin ceramic ferrite tile with exceptional RF absorbing characteristics in the frequency range of 10 MHz to 2 GHz. C-RAM FT-10 is a sintered ceramic and is excellent for high power and high temperature application up to the Curie point of 203°F. The tile has no outgassing and is ideal in high vacuum applications. C-RAM FT-10 is frequently used in antenna caps and shielded enclosures to eliminate enclosure resonances during testing or emission measurements. C-RAM FT-10 is used to line anechoic chambers for radiated emissions (ANSI C63.4) and immunity (IEC 1000-4-3) testing. These tiles can be combined with specially designed urethane foam pyramidal absorbers to extend chamber operation to above 40 GHz.

Cuming Ferrite Tile RF Absorber

C-RAM FT-10

THIN CERAMIC FERRITE TILE RF ABSORBER

FERRITE TILE

10 MHz - 2 GHz

C-RAM FT-10 is a thin ceramic ferrite tile with exceptional RF absorbing characteristics in the frequency range of 10 MHz to 2 GHz.

C-RAM FT-10 is a sintered ceramic and is excellent for high power and high temperature application up to the Curie point of 203°F. The tile has no outgassing and is ideal in high vacuum applications.

C-RAM FT-10 is frequently used in antenna caps and shielded enclosures to eliminate enclosure resonances during testing or emission measurements.

C-RAM FT-10 is used to line anechoic chambers for radiated emissions (ANSI C63.4) and immunity (IEC 1000-4-3) testing.

These tiles can be combined with specially designed urethane foam pyramidal absorbers to extend chamber operation to above 40 GHz.

TYPICAL DIMENSIONS REFLECTIVITY PERFORMANCE in -dB (SFC-FT-10)
Model	Height in. (mm)	Weight lb. (kg)	30MHz	100MHz	200MHz	400MHz	600MHz	1GHz	1.5GHz
FT-10	0.25 (6.3)	.71 (.324)	18	25	30	25	20	12	9

Cuming FT10 (6.3mm) Performance Graph

Cuming High Performance Outdoor Pyramidal Absorber

C-RAM ODP

HIGH PERFORMANCE OUTDOOR HIGH POWER RF ABSORBER

OUTDOOR PYRAMIDAL

120 MHz - 50 GHz

C-RAM ODP is a series of very high performance absorbers similar to C-RAM EVA.

C-RAM ODP is made from a lightweight open cell foam with large pores. This large pore size allows rain water to drain readily and dry quickly after rain stops.

The RF lossy coating is not affected by repeated exposure to rain.

C-RAM ODP is dimensionally equivalent to the corresponding grades of C-RAM SFC. The reflectivity characteristics are identical to those of C-RAM SFC.

C-RAM ODP is a very resilient material. It stands up well to moderate physical abuse and tolerates repeated deformations without tear or cracks.

C-RAM ODP is processed using a fire retardant saturant, however it does not meet the NRL 8093 test #1, 2 and 3 for fire retardancy.

Consequently the product is not recommended for indoor usage. See C-RAM EVA for indoor use.

C-RAM ODP PYRAMIDAL OUTDOOR PHYSICAL CHARACTERISTICS

TYPICAL REFLECTIVITY AT NORMAL INCIDENCE (dB)

Model	Height in. (mm)	Weight lb. (kg)	Tips / Piece	Reflectivity at Freq. (GHz)
Model	Height in. (mm)	Weight lb. (kg)	Tips / Piece	.12	.3	.5	1	3	6	10	18	*36	*50
ODP-4	4.3 (109)	3 (1.4)	144					30	35	42	50	50	50
ODP-6	6 (152)	3.5 (1.6)	100					32	40	45	50	50	50
ODP-8	8 (203)	4.5 (2.0)	64				30	37	45	50	50	50	50
ODP-12	12 (305)	6 (2.7)	36				35	40	45	50	50	50	50
ODP-18	18 (457)	12 (5.4)	16			30	37	40	45	50	50	50	>45
ODP-24	24 (610)	17 (7.7)	9		30	35	40	45	50	50	50	50	>45
ODP-36	36 (914)	24 (10.9)	4		35	37	42	50	50	50	50	50	>45
ODP-40	40 (1016)	39 (18)	4				43	50	50	50	50	50	50
ODP-48**	48 (1219)	38 (17)	2	28	35	40	50	50	50	50	50	50	>45
ODP-72**	72 (1829)	50 (23)	1	33	40	45	50	50	50	50	50	50	>45
ODP-96**	96		1

Cuming High Performance Ventilation Duct Pyramidal Absorber

C-RAM EVA

HIGH PERFORMANCE AIR VENT RF ABSORBER

Air Vent Absorber

120 MHz - 50 GHz

C-RAM EVA is a series of very high performance pyramidal absorbers suitable for exterior usage and capable of handling relatively high power densities. Being a very porous material, C-RAM EVA is used in anechoic chambers to cover air ducts, thereby reducing RF reflections.

C-RAM EVA is made from a very light, open cell foam with large cell size of 15 pores/inch.

This large pore size allows rainwater to drain readily, drying quickly after the rain stops. The RF lossy coating on the foam absorber is not affected by repeated exposure to rain. The large open cells permit forced air circulation through the material increasing the power handling capabilities to approximately 10 W/in² of RF power . Without forced air cooling, the material can typically handle 2 W/in².

C-RAM EVA PYRAMIDAL OUTDOOR PHYSICAL CHARACTERISTICS

TYPICAL REFLECTIVITY AT NORMAL INCIDENCE (dB)

Model	Height in. (mm)	Weight lb. (kg)	Tips / Piece	Reflectivity at Freq. (GHz)
Model	Height in. (mm)	Weight lb. (kg)	Tips / Piece	.12	.3	.5	1	3	6	10	18	*36	*50
EVA-4	4.3 (109)	3 (1.4)	144					30	35	42	50	50	50
EVA-6	6 (152)	3.5 (1.6)	100					32	40	45	50	50	50
EVA-8	8 (203)	4.5 (2.0)	64				30	37	45	50	50	50	50
EVA-12	12 (305)	6 (2.7)	36				35	40	45	50	50	50	50
EVA-18	18 (457)	12 (5.4)	16			30	37	40	45	50	50	50	>45
EVA-24	24 (610)	17 (7.7)	9		30	35	40	45	50	50	50	50	>45
EVA-36	36 (914)	24 (10.9)	4		35	37	42	50	50	50	50	50	>45
EVA-40	40 (1016)	39 (18)	4				43	50	50	50	50	50	50
EVA-48**	48 (1219)	38 (17)	2	28	35	40	50	50	50	50	50	50	>45
EVA-72**	72 (1829)	50 (23)	1	33	40	45	50	50	50	50	50	50	>45

Cuming High Performance Clean Room RF Absorber

C-RAM CFC

HIGH PERFORMANCE CLEAN ROOM RF ABSORBER

CLEAN ROOM

Meets Class 10,000 (ISO 7)

300 MHz - 10 GHz

C-RAM CFC is a series of high performance broadband RF absorbers designed for electronic and aerospace clean room applications. The carbon loaded foam is completely embedded in a clean material, so there is no dusting or release of conductive particles.

C-RAM CFC is made by embedding the corresponding grade of C-RAM SFC Pyramidal absorber in a mating section of expanded polystyrene foam, and sealing the back with a polyvinyl chloride plastic film.

The completed box is sprayed with a light blue antistatic coating, which can be wiped clean and requires no special vacuuming to maintain clean room conditions.

TYPICAL DIMENSIONS AND REFLECTIVITIES (dB) OF C-RAM CFC GRADES
Model	Height	300MHz	500MHz	1.0GHz	3.0GHz	6.0GHz	10GHz
CFC-4	4.8 (120)				30	35	42
CFC-8	8.8 (225)			30	37	45	50
CFC-12	13 (330)			35	40	45	50
CFC-18	19 (480)		30	37	45	50	50
CFC-24	25 (635)	30	35	40	45	50	50
CFC-36	37 (940)	35	37	42	50	50	50

Cuming Corner Block (Lossy Foam) RF Absorber

C-RAM CORNER BLOCK

HIGH PERFORMANCE CORNER BLOCK RF ABSORBER

CORNER BLOCK

120 MHz - 50 GHz

C-RAM-CB Corner Block is a carbon loaded urethane foam material used to fit anechoic chamber materials, such as C-RAM SFC, into the corners and edges of the chamber. TC-RAM Corner Block is a carbon loaded urethane foam material used to fit anechoic chamber materials, such as C-RAM SFC, into the corners and edges of the chamber.

These products meet all of the fire retardancy requirements of NRL Specification 8093.

C-RAM Corner Block is made of the same material as the pyramidal absorber it is being used with. It will have the same density and impedance as the C-RAM SFC foam.

CORNER BLOCK PHYSICAL CHARACTERISTICS

TYPICAL REFLECTIVITY AT NORMAL INCIDENCE (dB)

Model	Height in. (mm)	Weight lb. (kg)	Reflectivity at Freq. (GHz)
Model	Height in. (mm)	Weight lb. (kg)	.12	.3	.5	1	3	6	10	18	*36	*50
CB-4	4.3 (109)	3 (1.4)					30	35	42	50	50	50
CB-6	6 (152)	3.5 (1.6)					32	40	45	50	50	50
CB-8	8 (203)	4.5 (2.0)				30	37	45	50	50	50	50
CB-12	12 (305)	6 (2.7)				35	40	45	50	50	50	50
CB-18	18 (457)	12 (5.4)			30	37	40	45	50	50	50	>45
CB-24	24 (610)	17 (7.7)		30	35	40	45	50	50	50	50	>45
CB-36	36 (914)	24 (10.9)		35	37	42	50	50	50	50	50	>45
CB-40	40 (1016)	39 (18)				43	50	50	50	50	50	50
CB-48**	48 (1219)	38 (17)	28	35	40	50	50	50	50	50	50	>45
CB-72**	72 (1829)	50 (23)	33	40	45	50	50	50	50	50	50	>45

Cuming Wall Termination (Lossy Foam) RF Absorber

C-RAM WALL TERMINATION

HIGH PERFORMANCE WALL TERMINATION RF ABSORBER

WALL TERMINATION

250 MHz - 50 GHz

C-RAM WT is a carbon loaded urethane foam material used to transition a series of wedge or pyramidal anechoic chamber absorbers into a termination at a wall. It has a tapering wedge profile cut into its surface to help match the impedance of wide-angle RF energy traveling along the valleys in pyramidal or wedge shaped absorbers.

These products meet all of the fire retardancy requirements of NRL Specification 8093.

C-RAM WT is made of the same material as the pyramidal or wedge absorber it is being used with. It will have the same density and impedance as the C-RAM SFC foam.

The product is black throughout, and generally is sprayed with a light blue surface coating, both for cleanliness and to provide better light reflection inside an anechoic chamber. The absorber can be left unpainted if requested.

WALL TERMINATION PHYSICAL CHARACTERISTICS

Model	Height in. (mm)	Base Dimensions	Used with Pyramidal Grade
WT-2	2 (51)	12" x 24"	SFC-12, SFC-12W
WT-3	3 (76)	18" x 24"	SFC-18, SFC-18W
WT-4	4 (102)	24" x 24"	SFC-24, SFC-24W
WT-6	6 (152)	24" x 36"	SFC-36, SFC-36W