B&Z Technologies Waveguide amplifiers typically have waveguide as the RF input port and coaxial RF output. We offer industry leading performance in this category of amplifiers. The engineers at B&Z have spent years developing and improving amplifier designs to minimize insertion loss and return loss at the amplifier's input. This effort has resulted in Waveguide input amplifiers with the best operating performance. Many times, a B&Z waveguide amplifier can meet a tough input VSWR specification where the competition would require an input isolator and its associated insertion loss.