Patent ID: 8384499

Claim:
A leaky cable comprising: a central conductor; an outer conductor having a rectangular cross section and surrounding the central conductor, the outer conductor comprising first and second surfaces parallel to each other, and at least one slot row formed only in the first surface, the at least one slot row being formed in a lengthwise direction of the leaky cable, the at least one slot row comprises a plurality of slots each configured to form a leaky electromagnetic field, the second surface being configured to reflect a part of electromagnetic waves radiated from the first surface, the part of the electromagnetic waves being diffracted backward to the second surface; an insulator disposed between the central conductor and the outer conductor; and a sheath covering the outer conductor, wherein a width of the rectangular cross section in a direction parallel to the first and second surfaces is less than half of a wavelength of an electric signal transmitted through the leaky cable, wherein the second surface has a width in a transverse direction normal to the lengthwise direction, the width of the second surface is larger than a width of the first surface in a transverse direction normal to the lengthwise direction.