Helical antenna with a built-in matching circuit

Abstract

A helical antenna with a built-in matching circuit therein, wherein, the antenna has a metallic receiving seat of which the surface is connected with an electric circuit board coincident in shape with the receiving seat, a helical microstrip line having an inner starting point and an external terminating point is provided on the electric circuit board; an insulation member is inserted into the metallic receiving seat; a metallic connecting rod is inserted into central holes respectively of the electric circuit board and the insulation member, the metallic connecting rod is welded with the top thereof to the inner starting point of the helical microstrip line and with the bottom end thereof extending downwardly and exposed; a coil element is welded with a bottom end thereof to the external terminating point of the helical microstrip line on the surface of the electric circuit board; thus the helical antenna with the matching circuit is completed without limitation by the matching circuit of a main board.

Dependencies are inferred from the claim text.