pll phase modulator

I am looking for a circuit which can phase modulate a carrier of 4000MHz.

Modulating frequency in the range 100Hz to 200KHz.

Can anybody give some clue or suggest a circuit to do it with PLL?

My requirement is to get 1.5radians phase shift at this frequency,
i.e the first sideband occuring at these 4000MHz+-Fmod frequenciies
should be about -4dBc or less.

Use a DDS as a reference and modulate the phase with N/R smaller size.

Hi radiohead,
Can you please elaborate your suggestion?

Or please give some reference to read and understand about what you have suggested.