| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an antenna device which can be miniaturized while obtaining high signal strength. <P>SOLUTION: The antenna device comprises: a first antenna 10 including a first antenna radome 11 formed of a dielectric into a roughly cylindrical shape extending in a reference direction Z and a first antenna element 12; and a second antenna 20 including a second antenna radome 21 formed of the dielectric into the roughly cylindrical shape extending in the reference direction and a second antenna element 22. Both antennas are arranged side by side in a direction orthogonal to an axis C1 of the first antenna radome, and when a first spherical coordinate system with a center of the first antenna element as an origin and a second spherical coordinate system with a center of the second antenna element as an origin are defined respectively, if a first azimuth angle ϕ1 of the first spherical coordinate system and a second azimuth angle ϕ2 of the second spherical coordinate system are the same, a thickness D1 on the first azimuth angle side of the first antenna radome and a thickness D2 on the second azimuth angle side of the second antenna radome are different from each other regardless of a value of the first azimuth angle. <P>COPYRIGHT: (C)2013,JPO&INPIT |
