| 摘要 |
The multi-band antenna 1 is provided with a dielectric having the three-layer structure obtained by stacking layers so as that a central dielectric layer 12 made of a low dielectric constant material is sandwiched by lower and upper side dielectric layers 11, 13 made of high dielectric constant materials, a fed element 12 formed between the central dielectric layer 12 and the upper dielectric layer 13 and its base end being connected to a feed point on a specified side face of the dielectric having the three-layer structure, a grounded parasitic element 22 formed between the central dielectric layer 12 and the lower dielectric layer 11 and its base end being grounded on a specified side face, wherein the fed element 21 and the grounded parasitic element 22 is formed from the base end to the open end by a element obtained by connecting a plurality of line conductors and folding at least around the side face opposite to the specified face.
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