Patent ID: 6633261
Filing Date: 2003-10-14
Classification: H01Q

Abstract:
An antenna for use in a wireless device, said antenna comprising:a conductive base plate for providing a ground level; an antenna sub-element disposed on said conductive base plate; a supply connection member for applying a predetermined voltage to said antenna sub-element; at least one short-circuiting connection member for short-circuiting said antenna sub-element to said conductive base plate; and an electromagnetic field coupling adjustment element having an end electrically coupled to said antenna sub-element, wherein said electromagnetic field coupling adjustment element has a predetermined interspace with respect to at least one of said conductive base plate and said at least one short-circuiting connection member and extends in a direction generally parallel to said at least one of said conductive base plate and said at least one short-circuiting connection member, so as to produce an electromagnetic field coupling effect in conjunction with said at least one of said conductive base plate and said at least one short-circuiting connection member, without increasing a maximum value of a current path length, and wherein a length from a junction of said supply connection member and said antenna sub-element to an open end of said antenna sub-element along said antenna sub-element is greater than or equal to a length from the junction-to an open end of said electromagnetic field coupling adjustment element along a portion of said antenna sub-element between said supply connection member and said electromagnetic field coupling adjustment element and said electromagnetic field coupling adjustment element.