Hi, Normal SMD capacitors like the 0603 can't be used at 10 GHz, even the 0402 do not go that high. The problem is that the capacity written on the caps will increase (yes, increase) at higher frequencies and also internal resistance/inductance will increase. If you need it to feed the antenna signal at 50 Ohm to a matching network you can use it (if your lucky) but all other work is not going to work.
Normal SMD C's will work fine upto some 1500 MHz, above this frequency performance drops. better use ATC 600 series of capacitors designed for 10GHz and beyond.
Better use a radial stub to decoupling RF from powerlines.
regards,
Paul.
PS: Before you try, do not use normal FR4 at 10 GHz !!!!..