The ADM-5974CH from Marki Microwave is broadband MMIC LO buffer amplifier that operates from DC to 35 GHz. The amplifier provides efficient, optimized LO drive to all Marki mixers in band with no required negative bias or sequencing. The amplifier has been built on a low noise pHEMT process to provide competitive phase noise performance to competing broadband amplifiers. Second harmonic rejection can be tuned to very low levels using the optional negative bias. It is available as a bare die that is with enhanced moisture resistance for improved reliability.