500mhz oscillator

I want to make oscillator range from 500MHZ to 2GHZ? which oscillator you suggest me?
Colpitts,Clapp or Hartley
and why you suggest this?
please tell me i need to know about it?

It is very difficult to realize an oscillator with 1.5 GHz bandwidth.
Colpitts or simular can be a good choiche, a common base bjt with the resonator in base...

can i do this with cascaded circuit?
like

o/p of 1st oscillator in i/p of second oscillator?

This is a Colpitts VCO example

I guess the differential VCO may be a good choice.But due to some restrictions like phase noise,temperature effects,pulling etc. this oscillator using with dicrete components can be a little bit sensitive for practical purposes..
But it's possible..

any VCO for range of
925-960 MHZ

Try this its a 860Mhz - 950Mhz OSC with Integrated Tank Circuit. Its the MAXIM 2623

http://www.maxim-ic.com/quick_view2.cfm/qv_pk/2061

Added after 3 minutes:

Also Even I tried to do that Wideband VCO and from my experience I can tell you the best way is to take two Wideband VCOs and put them through a Mixer and filter the output. Else If you would rather have lesser work you could get a Mini Circuits Designer Kit KPOS1+ which has low phase noise Osc from 25Mhz to 1Ghz, they do have higher frequencies also like the 2GHz range.But mind you it is 13 VCOs

please study the content of link below
http://www.qsl.net/va3iul/High_Frequ...Schematics.htm