Realization of a 5 and 10 MHz High Performance Isolation Distribution Amplifier for short term frequency stability measurements of frequency sources

International audienceOur Laboratoire National d'Essai (LNE) associate laboratory is accredited to deliver calibration certificates in the short term domain. For spectral density of phase noise and short term frequency stability measurements, it is necessary to have the best reference source signals. However, the noise of the distribution amplifier has to be the weakest possible in order to keep the lowest noise floor. In order to deliver references signals, we achieve a high performances distribution amplifier. In terms of Allan variance, performance of the realized four channels distribution amplifier is respectively better than sigmay(to=1s) = 1,4.10-14 and 7,3.10-15 at 5 and 10 MHz. The intrinsic spectral density of phase noise is then better than Sphi(1Hz) = –141,4 dB.rad²/Hz at 5 MHz and –141 dB.rad²/Hz at 10 MHz with a 1/f slope