PURPOSE: To attain an inexpensive system, to simplify the work and to save the trouble by providing a conductor pattern or a conductor wire sending/ receiving a signal of a cordless device to a long body so as to eliminate the need for an antenna and a mixing distributer to each room.
CONSTITUTION: Coaxial cables 30, 31 and pair wires are formed as a bundle and sheathed by an outer sheath 34. Conductor patterns 40a, 40b are formed to the outer face of the outer sheath 34 by printing. The conductor patterns 40a, 40b consist of feeding patterns 41a, 41b and antenna pattern parts 42a, 42b respectively. In varying the length L of the antenna patterns parts 42a, 42b sequentially, the frequency band is widened. The conductor pattern or the conductor wire can be provided onto the surface of a long body such as a water supply pipe, a gas pipe or a structure member having an optional cross sectional shape.
MUTA FUSAO
KOIZUMI YU
URUSHIBATA KENICHI
SATO SHIZUYOSHI
TAKO NORIYUKI
IWATSU ELECTRIC CO LTD
SUMITOMO ELECTRIC INDUSTRIES