Patent ID: 7626561

Claim:
A signal carrying apparatus ( 101 ) for carrying a signal by variation of an electromagnetic field, comprising: a meshed first conductor portion ( 111 ) which serves as a conductor in the frequency band of the electromagnetic field, and a second conductor portion ( 121 ) of which external shape is sheet-like and which serves as a conductor in the frequency band of the electromagnetic field and arranged by being spaced out by a shorter distance than a wavelength in the frequency band of the electromagnetic field and substantially in parallel with the first conductor portion ( 111 ); wherein the electromagnetic field is carried in the frequency band in an interval region ( 131 ) between the external shape of the first conductor portion ( 111 ) and the external shape of the second conductor portion ( 121 ), and in a planar leak region ( 141 ) located oppositely to the interval region ( 131 ) across the external shape of the first conductor portion ( 111 ); and wherein a traveling wave component which is affected by the meshed shape out of the electromagnetic field in the leak region ( 141 ) has a strength attenuating exponentially with the distance from the external shape of the first conductor portion ( 111 ).