sooncf wrote:

I am going to build a transmitter to
beam radio signal into space.
hopping one day ET may receive my signal and maybe come to visit me.

Interesting project. A good start would be to investigate Earth-Moon-Earth ("eme") communication as done by radio hams and then 'upgrade' a few million times from that.

I live in a remote place (inside jungle) some where in south east asia.
So I don't need to apply license from the government.
(no way for the government to detect my signal).

Really?... Are you sure?...

Currently I own a dish size 3 meter.
Is it enough for this purpose, or do I
need a bigger dish?
And what frequency is the best?

There are some commercial groups that you can sponsor to include your message of goodwill. They use such as Arecibo with very high transmit power.


Good luck,
Martin