| 摘要 |
An antenna device 10 comprises azimuthal range ("sector") antennas in which an upward directivity antenna 21 is paired with a downward directivity antenna 22 , and different sector antennas in which an upward directivity antenna 23 is paired with a downward directivity antenna 24 . The upward directivity antennas 21 and 23 are the antennas upwardly directed toward a tilt-angle range, and the downward directivity antennas 22 and 24 are the antennas downwardly directed toward a tilt-angle range. The sector antennas are the antennas for transmitting and receiving radio signals from azimuthal ranges (sectors) being a fill sweep divided into three or more, and the two pairs each are disposed horizontally in an individual sector. By providing these configurations, while efficiently utilizing their installation space, effectiveness of diversity can be enhanced.
|
