desigining high power fm transmitter

Hi everyone
I have an upcoming project display where my assigned project is to built an fm transmitter of 20 watt but i don't have much of knowledge about fm transmitter so i want to have detailed knowledge about fm transmitter .... i searched in goggle and youtube but didn't find anything there that is much of help so i am looking for help to designing the circuit of fm transmitter

the below points are my main key of interests :

*basics of fm transmission and fm transmitter

*on what the power of fm transmitter depends and how to increase

*designing the circuit by analog components if possible

*designing the circuit by digital components if possible

finally thanks for your helps in advance
sincerely - Munibun Billah Nirjhar

The ARRL Handbook has much info on FM transmitters from theory to practical units

cheers
Dave