Onboard low phase noise microwave frequency synthesizers with high speed DAC and high frequency local oscillators

Electronic warfare sub-systems always need at the same time wideband agile synthesizer and the lowest noise. When the synthesizer is carried onboard, one must look after the vibration-induced noise that could deteriorate the close-to-the-carrier phase noise. This article describes the choice of the DAC and local oscillators in order to reach high performance onboard frequency synthesizer.