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Cuming Microwave is the only full service supplier in the world offering a complete line of dielectric, artificial dielectrics, ray domes, RF absorbers and anechoic chambers for the international aerospace and electronics and defense industries.

Made in the USA 

 

ROHS

 

High Performance Hollow Pyramidal Absorber

 

C-RAM HPA

 

HIGH PERFORMANCE HIGH POWER RF ABSORBER

 

HOLLOW PYRAMIDAL

 

30 MHz - 10 GHz

 

Hollow Pyramidal RF Absorber

 

 

C-RAM HPA is a hollow pyramidal RF absorber designed to provide high levels of absorption in high power applications. Typical uses include the hot spots in test rooms or anechoic chambers where heating due to concentrated power might damage conventional materials or lead to danger of smoke and fire.

 

Power densities of up to 15 W/in2 have been handled successfully. C-RAM HPA is usually used with other products such as C-RAM SFC or C-RAM EVA in an anechoic chamber application.

 

Data

TYPICAL PHYSICAL AND REFLECTIVITY CHARACTERISTICS OF C-RAM HPA

 

High Performance Outdoor Pyramidal Absorber

 

C-RAM ODP

 

HIGH PERFORMANCE HIGH POWER RF ABSORBER

 

OUTDOOR PYRAMIDAL

 

120 MHz - 50 GHz

 

Outdoor Pyramidal RF & Microwave Absorber

 

 

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.

 

Data

 

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)

.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                    

 

High Performance Ventilation Duct Pyramidal Absorber

 

C-RAM EVA

 

HIGH PERFORMANCE HIGH POWER RF ABSORBER

 

Ventilation Duct

 

120 MHz - 50 GHz

 

RF Absorber for Air Vent

 

 

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.

 

Data

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)

.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

 

High Performance Clean Room RF Absorber

 

C-RAM CFC

 

HIGH PERFORMANCE RF ABSORBER

 

CLEAN ROOM

 

300 MHz - 10 GHz

 

Clean Room RF Absorber

 

 

 

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.

 

Meets Class 10,000 (ISO 7)

 

Data

TYPICAL DIMENSIONS AND REFLECTIVITIES (dB)

OF C-RAM CFC GRADES

 

Corner Block (Lossy Foam) RF Absorber

 

C-RAM CORNER BLOCK

 

HIGH PERFORMANCE RF ABSORBER

 

CORNER BLOCK

 

120 MHz - 50 GHz

 

Corner Block RF Absorber

 

 

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.

 

Data

CORNER BLOCK PHYSICAL CHARACTERISTICS

 

TYPICAL REFLECTIVITY AT NORMAL INCIDENCE (dB)

Model

Height
in. (mm)

Weight
lb. (kg)

Reflectivity at Freq. (GHz)

.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

 

 

     

 

 

 Last Updated: June 23, 2017

  Copyright 2001- 2017  R. A. Mayes Company, Inc.

An Electro Mechanical Research and Development (EMRAD) Corporation, Company

 
     
 

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