Title:
ANTENNA
Document Type and Number:
WIPO Patent Application WO/2014/034490
Kind Code:
A1
Abstract:
An omnidirectional vertically polarized antenna is configured with k (k ≥ 3) units of monopole antennas disposed at even intervals upon the circumference of a given circle, and an omnidirectional horizontally polarized antenna is configured with first to mth omnidirectional antennas stacked in m (m ≥ 2) layers in a first direction orthogonal to a reflective plate. The first to mth omnidirectional antennas are configured with n units of half-wavelength dipole antennas. When viewed from the direction on the opposite side of the first direction, the n (n ≥ 3) units of half-wavelength dipole antennas configuring the first to mth omnidirectional antennas are each configured with arcuate conductors, and are disposed at even intervals upon the circumferences of m units of circles of different diameters. The first to mth omnidirectional antennas are stacked toward the first direction from the reflective plate. As a result, a dual polarized antenna is provided which uses omnidirectional antennas which use half-wavelength dipole antennas, thereby achieving omnidirectional directivity within the horizontal plane with less directivity deviation than in the prior art.
More Like This:
| WO/2019/122763 | INTERFEROMETRIC LIGHTNING DETECTION SYSTEM |
| WO/1989/000774 | TRANSMITTING AND RECEPTION ANTENNA |
Inventors:
HAGIWARA HIROKI (JP)
HIRAMATSU HIDENOBU (JP)
SOGA TOMOYUKI (JP)
SHIMURA TAKESHI (JP)
HIRAMATSU HIDENOBU (JP)
SOGA TOMOYUKI (JP)
SHIMURA TAKESHI (JP)
Application Number:
PCT/JP2013/072288
Publication Date:
March 06, 2014
Filing Date:
August 21, 2013
Export Citation:
Assignee:
NIPPON DENGYO KOSAKU KK (JP)
International Classes:
H01Q21/20; H01Q9/16; H01Q9/40; H01Q19/10; H01Q21/24; H01Q21/28
Domestic Patent References:
| WO2011147937A1 | 2011-12-01 | |||
| WO2004055938A2 | 2004-07-01 |
Foreign References:
| JPH11261335A | 1999-09-24 | |||
| JP2006074537A | 2006-03-16 | |||
| JP2009231927A | 2009-10-08 | |||
| JP2009534942A | 2009-09-24 | |||
| EP1056154A1 | 2000-11-29 | |||
| JPH03262307A | 1991-11-22 | |||
| US20070069968A1 | 2007-03-29 | |||
| JPH1168446A | 1999-03-09 |
Attorney, Agent or Firm:
FURUBE, Jiro et al. (JP)
Jiro Furube (JP)
Jiro Furube (JP)
Download PDF:
Previous Patent: DISCHARGE MEMBER FOR ANALYSIS
Next Patent: ELECTRIC POWER TRANSMISSION DEVICE AND ELECTRIC POWER TRANSMISSION METHOD
Next Patent: ELECTRIC POWER TRANSMISSION DEVICE AND ELECTRIC POWER TRANSMISSION METHOD