ANTENNA, AND GUTTER WITH ANTENNA

摘要

PROBLEM TO BE SOLVED: To provide an antenna which does not have a large restriction in adjustment of an orientation like an eave-gutter antenna, and can correspond to a wide frequency zone; and an eave-gutter with the antenna.

SOLUTION: An antenna includes a slot 20 (a first receiving portion 2) formed along an axial direction of a conductive member 1 of a generally C-shaped cross-section. A frequency zone of electric waves which are required to receive is roughly divided into first and second frequency zones, and a length L2 of the slot 20 is formed to be a length of an electric half wavelength of the electric wave in the first frequency zone. A circumferential length W5 of a part (a second receiving portion 3) adjacent to the length L2 direction of the slot 20 is formed to be a length of an electric half wavelength of the electric wave in the second frequency zone. A clearance 4 between both ends in a circumferential direction of the conductive member 1 is formed at a position opposite to the slot 20 to form a punching portion 5. A width W3 of the punching portion 5 is formed to be a length not less than a maximum width W2 of the slot 20.

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