Microwave regenerative frequency dividers with low phase noise

摘要

We demonstrate regenerative divide-by-two (halver) circuits withnvery low phase modulation (PM) noise at input frequencies of 18.4 GHznand 39.8 GHz. The PM noise of the 18.4 to 9.2 GHz divider pair was L(10nHz)=-134 dB below the carrier in a 1 Hz bandwidth (dBc/Hz) and L(10nMHz)=-166 dBc/Hz, and the PM noise of the 39.8 GHz to 19.9 GHz dividernpair was L(10 Hz)=-122 dBc/Hz and L(10 MHz)=-167 dBc/Hz