ANTENNA DEVICE

摘要

<P>PROBLEM TO BE SOLVED: To improve isolation between two polarized wave sharing antennas in an antenna device in which the two polarized wave sharing antennas are disposed to sandwich a metal column. Ž<P>SOLUTION: The polarized wave sharing antenna includes (2×2) polarized wave sharing antenna elements. The polarized wave sharing antenna elements includes a pair of half-wave dipole antenna elements for horizontal polarized waves and a pair of half-wave dipole antenna elements for vertical polarized waves. The pair of half-wave dipole antenna elements for horizontal polarized waves and the pair of half-wave dipole antenna elements for vertical polarized waves are disposed to form rectangular shapes. When λo is the free space wavelength of used center frequency, the polarized wave sharing antenna elements are disposed so that the distances between the centers of the rectangular shapes formed by the pair of half-wave dipole antenna elements for horizontal polarized waves and the pair of half-wave dipole antenna elements for vertical polarized waves are 0.6λo to 0.8λo. The distances between the two polarized wave sharing antennas is 0.3λo to 0.5λo. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž