| 摘要 |
PROBLEM TO BE SOLVED: To provide an antenna unit, with which an antenna element 2 can be easily formed together with an attachment 3 and further, the electric characteristics of the antenna element 2 are not changed by molding pressure in the case of integral molding. SOLUTION: The pipe-shaped antenna element 2 is formed by folding a band-shape blank stamped out from a conductive sheet metal, a base integrated with the band-shape is made into attachment 3 and as the ground antenna of 1/4 wavelength, the pipe-shaped antenna element 2 is resonated at a band frequency (f) to be used for communication equipment for mobil object. Because of the pipe-shaped antenna element 2, this element is not deformed by molding pressure in the case of covering it with insulting covers 5 and 11 or external force in the case of assembly so that the electric characteristics are not changed.
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