发明授权
- 专利标题: Helical antenna
- 专利标题(中): 螺旋天线
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申请号: US10157054申请日: 2002-05-30
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公开(公告)号: US06710752B2公开(公告)日: 2004-03-23
- 发明人: Tetsuya Saito , Makoto Yamaguchi
- 申请人: Tetsuya Saito , Makoto Yamaguchi
- 优先权: JP2001-164659 20010531
- 主分类号: H01Q136
- IPC分类号: H01Q136
摘要:
In a helical antenna operable at a plurality of frequencies, a radiation element includes a first pitch portion which is connected to a feeding point and in which the electric conductor is wound around or folded back at a first pitch, and a second pitch portion which is connected to the first pitch portion and in which the electric conductor is wound around or folded back at a second pitch different from the first pitch. A tip end stab element extended from the tip end of the radiation element is placed in close proximity of the radiation element. The radiation element and the tip end element form frequency selection means or a parallel resonant circuit at an intermediate point of the radiation element.
公开/授权文献
- US20030058186A1 Helical antenna 公开/授权日:2003-03-27