You don't have a clue how to make a radio transmitter and a radio receiver.
So you are asking about the antenna?
The antenna on my cell phone sticks up only 1.5cm. It operates up to microwave frequencies.
I don't think you know enough to make a microwave transmitter and receiver.
no i have done the TX & RX they work fine i measure the output frequncy of the transmitter & it was what i want it 100MHz and i want to stick an antenna but i want 2 be too small