| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a dual frequency shared dipole antenna device capable of improving vertical plane directivity in an array antenna, and obtaining a horizontal plane directivigy in sharing both horizontal and vertical of dual frequency plane sharing which is structural impossible. <P>SOLUTION: The dual frequency share dipole antenna consists of a first dipole antenna resonating in a first frequency f<SB>1</SB>and two dipole antennas each resonating in a second frequency f<SB>2</SB>(f<SB>2</SB>>f<SB>1</SB>) and disposed in a linear direction as a unit antenna constituting an array antenna device 51. (1) The one for vertical polarization feed power to the first dipole 12 at two points, and centrally feeds power to the two dipoles 13, 14, and (2) the one for horizontal polarization feeds power to the first and second dipole elements 22, 23 and 24 via a feeder circuit substrate 47 having a simple wave divider 47a at each center feeding point. A plurality of antenna devices for vertical polarization and a plurality of antenna devices for horizontal polarization are alternately disposed in a vertical direction. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
