ECCOSORB® VF-30 is a conductive vinyl film that can be used to line the interior of a cavity to lower the Q or to alter the flow of high frequency currents. Wedges or tapers can be made and applied to the interior of waveguides as terminations. It can be utilized in resistors or as a potentiometer. Geometric shaping of the sheet can produce a desired resistive gradient. ECCOSORB® VF-30 can be softened at higher temperatures and be bonded to itself by heat sealing.
Other applications include using the material to make free space absorbers of the Salisbury Screen. type. The film is spaced away from a metal surface by about ¼ wavelength. The resultant absorber is narrow-band. Wide band free space absorbers have been made from ECCOSORB® VF-30 by draping it over wooden frames to form a hollow cone or pyramid with the tip toward the source of radiation. Pressing cones or pyramids into the sheet has also been successful.
