Patent ID: 7457650

Claim:
A portable radio communication apparatus comprising: a housing containing a radio communication circuit; a projection portion having a first end portion connected to said housing, a second end portion connected to said housing, and a central portion located between the first and second end portions, said projection portion configured to project from said housing at an obtuse angle thereto; a grounding conductor arranged in said housing; and an antenna element connected to the radio communication circuit through a feeding point above said grounding conductor, wherein at least one part of said antenna element is mounted in at least one of an inner part and a surface of said projection portion, wherein an unbalanced antenna is formed by the antenna element and the grounding conductor, and wherein, when said housing is supported on a flat surface, a surface of said housing opposes the flat surface and is floated from the flat surface by said projection portion so as to form the obtuse angle between said projection portion and the surface of said housing, thereby separating the grounding conductor of said antenna element from the flat surface, and suppressing any deterioration of antenna gain due to electromagnetic coupling of the grounding conductor with the flat surface.