The 2A7NFD-S from Renaissance Electronics is a Coaxial Isolator that operates from 7.8 to 8.4 GHz. It has an isolation of 20 dB and an insertion loss of less than 0.5 dB. This compact isolator can handle up to 2 W of power and is available in a module that measures 0.62 x 0.5 x 0.5 inches and has coaxial connectors. This device meets all NASA outgassing requirements and is ideal for space or harsh environments.