oscilator design

Hi everyone
would you please introduce me a novel website or tutorial about oscilator design.i'm eager to design of S band oscilation
thanks in advance

A good start with
www.circuitsage.com
Then read this
"High Purity Oscillators, Emad Hegazi, Jacob Rael,Asad Abidi-Kluwer Academic Publishers-2005"
And this
"Microwave solid State Circuit Design, I.Bahl,Bhartia-Wiley"
God luck..

Maybe it could help you