How to send a signal on an antenna?

I want to transmitt a 2 MHz signal cerated by an oscilator via an antenna. how can i do that and what circuit is needed?

very simply suppose i want to transmitt a sine wave from a function generator via an antenna. what circuit should be there to match the funtion generatr and antenna ?

PLEASE HELP ME !

2MHz is rather low frequency and if you want resonant antenna (like dipol) it would be almost 80 m long. So just attach some long piece of wire to the exit of function generator and see what happens. Search also for "long wire antenna". If you need an amplifier to increase power output from function generator, search for "1.8MHz amplifier", or "160m amplifier" because 1.8 MHz is radio-amateur band so you should be able to find a lot of interesting stuff.

Usually the antenna size is taken to be quarter-wave antenna...
i.e. the antenna is of size λ/4 where λ is the wavelength of the wave to be transmitted...
In your case λ=spped of light/frequency=c/f=3×10^8/2×10^6=150meter
and λ/4≈40meter
So you may connect a 40 meter long wire...in case of dipole, 80 meter long wire...
For matching...usually the function generator has a 50Ω or 75Ω BNC (female type) connector...so try connecting a BNC (male type) and solder a 40m wire with it...
Hope it helps...