step 2 in which an antenna core 200 is manufactured which antenna core is engaged by one among an adhering work an engaging work a mounting work an attaching work and an insert work so that the antenna radiation part 100 is exposed from an outer surface of one side and a cover formation step 3 in which a cover 300 is inject formed at an exposed surface of the side of the antenna radiation part 100 of the antenna core 200 in a state that the antenna core 200 is inserted in the cover forming mold 20 as shown in fig1 in the cover formation step 3 the antenna module in which the antenna radiation part is inserted is manufactured by exchanging the core outer side mold 10 a with the cover outer side mold 20 a in a state that the antenna core 200 is not separated from the inner side mold after the antenna core manufacture step 2 is performed as shown in fig2 3 and 5 the manufacture procedure of the antenna radiation part is characterized in that a conductive metal sheet such as a copper of 0 08 u02dc 0 15 mm or a stainless or iron is cut to form an antenna pattern and the cut antenna material is bent multiple times depending on a designed shape thus forming a curve with.