I'm trying to make a three wheeled robot travel horizontally to a transmitter. I was thinking about having it follow a radio signal (transmitter). Meaning that if I had the radio signal on my person, it would be able to follow me as long as I was on fairly flat ground. I would also like it to keep a good distance from the transmitter. As you may already know, I do not know much about robotics but I would like to know what books/sites/parts I can use to make this a possibility.
I was reading a good deal about Directional Finding (DF) hardware. Though I am still not sure how to code or do anything with the parts. I have found this website so far:
http://www.robotshop.com/general-rf-data-telemetry.html
Can someone please steer me in the right direction?