Time delay on an FMCW signal

I am trying to build a simple ciruit to delay an FMCW signal (frequency range of [1-10] Ghz) with mutiple of 50 pico second (ps). A bank of delays with mutiple of 50 ps, i.e., 50 ps, 100 ps, 150 ps, ...,.

Any suggestion preferebly with RFIC,MMIC, or even other discrete componenets highly apprecited!
Lo