Cuming Microwave C-RAM SFC-HC High Power Broadbanded Pyramidal Honeycomb RF Absorber

C-RAM SFC-HC is a series of high power pyramidal absorbers made from specially treated plastic honeycomb. Using a pyramidal design, which provides an impedance gradient, C-RAM SFC-HC provides premium performance in anechoic chambers at both normal and off-normal incidence angles.

TYPICAL PROPERTIES

Typically, C-RAM SFC-HC absorbers, with no forced air, can handle up to 10 W/in2 of RF energy with a phenolic coated honeycomb.

Cuming Microwave’s high power C-RAM SFCHC has been fully tested at high power. A complete test report is available which shows W/in2 versus temperature rise in the honeycomb.

With forced air cooling through the honeycomb cells, power handling is increased as shown in the tables (as tested at 10 GHz):

AVAILABILITY

Standard sizes of C-RAM SFC-HC are listed in Table 1, ranging from a 3¼ inch to 24 inch height. C-RAM SFC-HC-3 up through SFC-HC24 are shaped as conventional pyramids and supplied as square 24 inch (610 mm) panels.

In addition to simply supplying a bill of materials, Cuming Microwave designs and installs complete anechoic chambers. Chambers can be designed to meet your specifications, and an entire kit of materials is supplied, including factory pre-cuts of special fitting parts. We can install all materials or supply technical support to help you complete your own installation.

Custom sizes 48” to 72” in height are made in two or three sections held together with a couple of polymer threaded rods 1/8” dia., using polymer washer and nuts.

METHOD OF APPLICATION

SFC-HC honeycomb absorber pieces are generally installed in a chamber using mechanical fasteners. Plastic screws and washers can be screwed into the valleys between pyramids to hold pieces, or nylon cable ties can be used. In small test boxes, the absorbers can be cut slightly oversize and press-fit into place. Contact our engineering staff to discuss various options depending upon your application.

Larger absorbers are most easily mounted on an open grid, using mechanical fastening.