A miniaturized frequency synthesizer system design based on ADF4350

A small sized, light weighted receiver local oscillator based on integrated PLL chip ADF4350 was designed to fit into airborne equipment of UAV datalink. Integrated with a phase detector and a voltage controlled oscillator, the phase-locked loop (PLL) frequency synthesizer was implemented by using an external loop filter, reference frequency and control circuit to meet the technical and size requirements. Experiments demonstrated the stability and reliability of the local oscillator and proved its value on practical application.