Broadband SHF phase-locked loop frequency synthesizers
Radio engineering. Electronics. Telecommunication systems
Аuthors
Abstract
Octave frequency band SHF phase-locked loop (PLL) frequency synthesizers (FS) for three ranges 1 — 2 GHz, 2 — 4 GHz and 4 — 8 GHz are developed and manufactured. The engineering design technique of FS and the MathCAD computer program for power spectral density calculation is developed. Recommendations for PLL pass-band choice are given. Three ranges of FS parameters are calculated. Scheme and design of FS operated in range 2 — 4 GHz are presented. Good agreement between spectral characteristics of this FS and calculated ones is shown. Power spectral density of FS has spur reduction is 40 dB, phase noise levels are minus 62 dBc/Hz, 85 dBc/Hz and 128 dBc/Hz at frequency offset from carrier 10 kHz, 100kHz and 1 MHz accordingly.Keywords:
frequency synthesizer, Phase Locked Loop, loop filter, phase noise.Download