Re: 2GHz oscillator
You can design a very good stable oscillator using ceramic resonators, You follow the same design procedures as you would do for a colpits oscillator. For the resonator you should use a ceramic resonator that operators at around 2.7GHz; the resonator is capacitively coupled into the base of the transistor. These oscillators have very good phase noise and are reasonably stable over temperature. Any free running oscillator should be locked to a reference so that it does not drift.
Good Luck
Shogun