PHASE NOISE OF X-BAND REGENERATIVE FREQUENCY DIVIDERS

摘要

This paper evaluates the design and implementation of experimental low noise regenerative divide-by-two (LNRD) dividers having low phase noise at the output frequency of 4.5GHz. The noise measurements of the 9GHz to 4.5GHz LNRD shows close-in flicker-of-phase noise of ￡(lkHz) = -155 dBc/Hz and broadband thermal noise floor of ￡(1MHz) = -170 dBc/Hz. For the design of the regenerative dividers, several MMIC amplifiers have been evaluated and their phase noise performance compared. The dividers have also been used in the generation of low noise 4.5GHz microwave signals. The LNRD design was easily extended for the design of a 4.5GHz to 2.25GHz LNRD which is currently under construction.