If i want to extend my Transmission, What should i do ? where should i connect to increase the transmission power ? How to calculate the distance ? Is there any book can explained this matter in detail ?
It all depends upon the frequency and several other things. At higher frequencies it is easier for people not too skilled in circuit design to improve their range with higher gain antennas that are at a larger distance from the surface of the earth.
It takes about 20 dB of combined receiver and transmitter gain improvement to double the range if it is over the visual horizon.