Exact Range of S band and Amateur band

S-Band 2 to 4GHz

The amateur bands, that depends on your country. For the UK band band plans for all amateur bands from 136kHz to 248GHz can be found here.

http://www.microwavers.org/files/2006bandplans.pdf

Not all countries have 3.4GHz available.
For your country, try your local national radio society.