ETS-Lindgren’s Rantec brand Curvilinear Absorber is an advanced new RF absorber product that is optimized for broadband reflection suppression. It is specially designed for chamber backwalls and other "hot spots" that require a Higher attenuation at normal incidence than equally-sized, conventional absorber provides.

This curvilinear absorber preserves an anechoic chamber's High frequency performance and extends the usable lower range down to 300 MHz, without the use of more expensive ferrite tiles. For both retrofits and new installations, Rantec's curvilinear absorber can improve performance and maximize available work space.