Antenna for two frequency bands
    1.
    发明授权
    Antenna for two frequency bands 失效
    两个频段天线

    公开(公告)号:US6031493A

    公开(公告)日:2000-02-29

    申请号:US704757

    申请日:1997-10-02

    摘要: An antenna unit operating for two frequency bands either when contained or pulled out. A fixed antenna unit 20 and a slide antenna unit 30 are provided. A helical antenna 21 is provided in the fixed antenna unit 20. A first monopole antenna 31 having the same axis as the helical antenna 21, a second monopole antenna 32, and an antenna cover 33 for holding the second monopole antenna 32 on the extended axis of the first monopole antenna 31 are provided in the slide antenna unit 30. The first monopole antenna 31 is held at the position where is not electromagnetically connected to the helical antenna 21 when the slide antenna unit 30 is pulled out, and the second monopole antenna 32 is held at the position where it is electromagnetically connected to the helical antenna 21. Further, the first monopole antenna 31 is held at the position where is electromagnetically connected to the helical antenna 21, and the second monopole antenna 32 is held at the position where is not electromagnetically connected to the helical antenna 21.

    摘要翻译: PCT No.PCT / JP96 / 00253 Sec。 371 1997年10月2日第 102(e)1997年10月2日PCT PCT 1996年2月7日PCT公布。 出版物WO96 / 24965 日期1996年8月15日天线单元在收纳或拉出时工作于两个频带。 提供固定天线单元20和滑动天线单元30。 螺旋天线21设置在固定天线单元20中。具有与螺旋天线21相同轴线的第一单极天线31,第二单极天线32和用于将第二单极天线32保持在延伸轴线上的天线罩33 第一单极天线31设置在滑动天线单元30中。当滑动天线单元30被拉出时,第一单极天线31被保持在不与螺旋天线21电磁连接的位置,第二单极天线 32被保持在与螺旋天线21电磁连接的位置。此外,第一单极天线31保持在与螺旋天线21电磁连接的位置,第二单极天线32保持在位置 其中不与螺旋天线21电磁连接。