The R2H4NNB is a S-Band drop-in isolator that operates from 2.7 to 2.9 GHz to protect amplifier circuits from unwanted reflected power levels. It has an insertion loss of 0.4 dB, isolation of 20 dB and a VSWR of 1.25:1 at the input/output. This low cost, high power, drop-in isolator has been optimized for Aeronautical communications and navigation systems.