RFRET 4000 (volleyball absorbing sponge)

RFRET 4000 (reticulated)

RFRET broadband foam is commonly used around antennas to provide isolation or side lobe reduction. It can be die-cut into components for EMI reduction inside microwave cavities and is used to manufacture antenna hats and test boxes. It can be encapsulated into a textile cover for use outdoors and fabricated into blankets, covers and other components. Recently, it has been used for a combination air/EMI filter in networking equipment. The product can be made UL 94 HF1 for such applications.

Typical attenuation values

Table of physical properties