Patent ID: 8681055

Claim:
A coupling structure for an antenna device including a housing, which retains a substrate connected to an antenna element for transmitting or receiving a communication signal, and a wire harness which extends out of the housing, the wire harness connected to the substrate, the coupling structure comprising: a coupling member that couples a portion of the wire harness to a conductor spaced apart from the housing, the coupling member fastening the wire harness to the conductor and causing the wire harness to be electromagnetically coupled with the conductor at the coupling member through an outer coating of the wire harness, wherein the coupling member is positioned on the conductor such that a first length of the wire harness extending from the housing to the coupling member is one fourth of a wavelength of the communication signal, and wherein the coupling member fastens the wire harness in close proximity to the conductor over a second length of the wire harness extending from the first length so as to cause the wire harness to be electromagnetically coupled with the conductor, the second length being at least one eighth of the wavelength of the communication signal and less than the first length.