Patent ID: 7619566

Claim:
An impedance transformation-type wide band antenna, comprising: a radiation part having a predetermined length and width according to an operating frequency and including a plurality of stubs formed in an arbitrary shape based on the location of a plurality of slots formed in a top surface and side surfaces of the radiation part; a short circuit part for causing part of a side surface of the radiation part to be connected to an external printed circuit board (PCB) ground; a feeding part having a multi-path structure extended from one side of the top surface of the radiation part formed by bending a plate multiple times according to a predetermined length and width associated with a size of a through hole formed in the multi-path structure, wherein the plate of the feeding part extended from the one side of the top surface of the radiation part is bent in a “U” or “S” shape to form multiple layers having at least one bent surface and an opening portion formed inside of the “U” or “S” shaped bent surfaces that are facing against each other; and wherein a plurality of resonant frequencies can be generated by a combination of bending the feeding part and the size of the hole; and a feeding pin formed on an end of the feeding part configured to be fed with an electric current.