Patent ID: 6384799
Filing Date: 2002-05-07
Classification: H01Q

Abstract:
An antenna for use in a mobile communication apparatus, comprising:a helical antenna element of a helical shape; and a flat flexible substrate that is adapted to be rounded to form a cylindrical shape; and a conductive sleeve that acts as an electrical feeding portion to said flat flexible substrate; wherein said helical antenna element comprises a plurality of oblique conductive patterns which extend between lateral end portions of said flat flexible substrate and which are electrically connected to one another at their terminal ends to form said helical shape when said flat flexible substrate is rounded to form the cylindrical shape, said oblique conductive patterns having a similar pitch therebetween, and wherein said flat flexible substrate comprises a feeding element formed at a longitudinal end portion thereof, said feeding element being adapted to be fitted around and electrically connected to an end portion of said conductive sleeve when said flat flexible substrate is rounded to form the cylindrical shape.