Design and implementation of X-band low phase noise frequency synthesizer using dual-loop technology

Abstract:

The digital Phase Locked Loop(PLL) frequency synthesizer technology is researched and analysed based on phase noise performance. An X-band PLL frequency synthesizer based on dual loop technology is introduced in contrast to conventional single locked loop technique. This design features small frequency step and low spurious characteristics with phase noise below -100 dBc/Hz@1 kHz.