Title:
クロスダイポールアンテナ
Document Type and Number:
Japanese Patent JP5502200
Kind Code:
B2
Abstract:
An apparatus has an improved antenna pattern for a cross dipole antenna. Such antennas desirably have an omnidirectional antenna pattern. Conventional cross dipole antennas exhibit nulls in their antenna patterns, which can cause antennas to deviate from a standard or specification. Applicant recognized and confirmed that the connection of a coaxial cable to the antenna arms is a cause of the nulls in the antenna pattern, and has devised techniques disclosed herein to compensate or cancel the effects of the connection. In one embodiment, the arms of the cross dipole antenna that are coupled to a center conductor of the coaxial cable remain of conventional length, but the arms of the cross dipole antenna that are coupled to a shield of the coaxial cable are lengthened by a fraction of the radius of the outer diameter of the coaxial cable.
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Inventors:
William Ernest Payne
Application Number:
JP2012523661A
Publication Date:
May 28, 2014
Filing Date:
July 29, 2010
Export Citation:
Assignee:
Venti Group LRC
International Classes:
H01Q9/16; H01Q21/24; H01Q21/26
Domestic Patent References:
| JP10126150A | ||||
| JP2009088625A | ||||
| JP2002100928A | ||||
| JP2004172906A | ||||
| JP2009100431A | ||||
| JP57154910A | ||||
| JP10041734A |
Foreign References:
| WO2005114789A2 |
Attorney, Agent or Firm:
Yasuhiko Murayama
Masatake Shiga
Takashi Watanabe
Shinya Mitsuhiro
Masatake Shiga
Takashi Watanabe
Shinya Mitsuhiro