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by rramadass 1061 days ago
Hardware to play with:

1) HackRF : https://greatscottgadgets.com/sdr/

2) RF Explorer : https://j3.rf-explorer.com/

You also need to study Physics (Electromagnetics) and Electronics (Communication Electronics). Checkout both popular textbooks and general audience books.

For a absolute beginner a good place to start is The Essential Guide to RF and Wireless by Carl Weisman.