A straightforward process on how you can make a homemade car antenna is 1, you must arrange your tapes; if possible, get a tape pack. 2, cut the cables. 3, peel off the rubber insulator on the cable. 4, twist the wire gently. 5, use the wire to wrap both ends of your pole; you must cover the ends pole with the wire and use tape to hold it down firmly. 6, locate the FM slots placed at your radio's back and plug your wire in. 7, use the wire to weave your tacks set on the wall and test your antenna.