| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To obtain an antenna device with a small diameter of an antenna, a low posture, a broadband, and no directivity in a horizontal plane. <P>SOLUTION: The antenna device comprises: a bottom board 1 that is a ground conductor; a circular conductor plate 2 arranged almost in parallel to the bottom board 1; a monopole conductor 3 the upper end of which is connected to the circular conductor plate 2 and in which a feeding point is provided between its lower end and the bottom board 1; one or more short pins 4 the lower end of which is connected to the bottom board 1; an annular conductor plate 5 arranged between the bottom board 1 and the circular conductor plate 2 almost in parallel to the bottom board 1, and in the center hole of which the monopole conductor 3 and the short pins 4 are inserted; and a sleeve conductor 6 the upper end of which is connected to an inner circle of the annular conductor plate 5, the lower end of which is connected to the bottom board 1, and in which the monopole conductor 3 and the like are inserted. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
