The MD3551B from Advanced Microwave Inc is a Frequency Multiplier with Input Frequency 3 to 8 GHz, Output Frequency 6 to 16 GHz, Input Power 16 to 19 dBm, Output Power 3 to 8 dBm, Harmonics -45 dBc(Third Harmonic). Tags: Module with Connectors. More details for MD3551B can be seen below.