Patent ID: 6683578
Filing Date: 2004-01-27
Classification: H01Q

Abstract:
A built-in antenna for a portable wireless unit comprising:a conductive antenna element disposed along the inside of a housing at an upper end of a portable wireless unit, the conductive antenna including: a monopole part defined as a part of a length of a substantially half-wavelength of the conductive antenna; an inverted-F antenna part defined as the remaining part of a length of a substantially Â¼ wavelength of the conductive antenna; and an antenna feeding point provided at a position near an earthing part of the inverted-F antenna part; wherein the inverted-F antenna part is disposed parallel to a ground plate surface within the housing of the portable wireless unit and parallel to the upper end of the portable wireless unit and one end of the inverted-F antenna part is connected to the ground plate as the earthing part.