Power supplies and grounds [hlp]

Hello Everyone;
Suppose that in a RF circuit, we want to produce 2 different frequencies with two PLLs. How about the power supplies and grounds of the PLLs? Most they be isolated for two PLLs?

the ground maybe common , but u need to filter the supply to each VCO and also for the charge pump , decoupling capacitors are needed , with different vaules also u may need some coils to increase the RF impedance of these tarces

khouly

Hello khouly;
you wrote:
Where the coils should be placed? Between power supplies of PLLs?