A structure having a substrate, patterned metal layer and a catalyst island formed on the metal layer. The fluoropolymers can be formed via step-growth polymerization of bisbiphenyls with bisphenols. The map memory array stores data containing compressed addresses of defective cells in a first memory array. Membranes of this design may be used in processing natural gas or other gases. The processor is configured to estimate a common phase offset and amplitude of the communication channel based on pilot tones received over the communication channel.