Combined AM/FM/cellular telephone antenna system
    2.
    发明授权
    Combined AM/FM/cellular telephone antenna system 失效
    组合AM / FM /蜂窝电话天线系统

    公开(公告)号:US5668564A

    公开(公告)日:1997-09-16

    申请号:US603176

    申请日:1996-02-20

    IPC分类号: H01Q5/15 H01Q9/16 H01Q1/32

    CPC分类号: H01Q9/16 H01Q5/371

    摘要: A combined AM/FM/cellular telephone antenna system comprises a coaxial cable with an upper portion of the inner conductor of the coaxial cable and an adjacent section of the coaxial cable together forming a cellular telephone dipole antenna. The coaxial cable forms a transmission line connecting the cellular dipole antenna to cellular telephone equipment. The outer conductor of a portion of the coaxial cable below the cellular dipole antenna serves as the AM/FM antenna. The combined antenna is encaged in a fiberglass housing and mounted on a metallic base having an upper shell and a lower shell. The upper shell is electrically connected to the outer conductor of the coaxial cable forming the antenna and the lower shell is connected to a ground plane. A coaxial cable having a center conductor connected to the upper shell and an outer conductor connected to the lower shield provides connection to AM/FM receiver equipment. Another coaxial cable having a center conductor connected to the center conductor of the antenna and an outer conductor connected to the lower shell provides connection to cellular telephone apparatus. A dielectric between the upper and lower shells provides a capacitance with low impedance in the cellular telephone frequency range and a high impedance in the AM/FM frequency range.

    摘要翻译: 组合的AM / FM /蜂窝电话天线系统包括具有同轴电缆的内部导体的上部的同轴电缆和同轴电缆的相邻部分一起形成蜂窝电话偶极天线。 同轴电缆形成将蜂窝式偶极天线连接到蜂窝电话设备的传输线。 蜂窝偶极天线下面的同轴电缆的一部分的外导体用作AM / FM天线。 组合的天线被包围在玻璃纤维外壳中,并安装在具有上壳体和下壳体的金属底座上。 上壳体电连接到形成天线的同轴电缆的外导体,下壳体连接到接地平面。 具有连接到上壳体的中心导体和连接到下屏蔽的外导体的同轴电缆提供到AM / FM接收机设备的连接。 具有连接到天线的中心导体的中心导体和连接到下壳的外导体的另一同轴电缆提供与蜂窝电话装置的连接。 上壳体和下壳体之间的电介质在蜂窝电话频率范围内提供低阻抗的电容,并且在AM / FM频率范围内提供高阻抗。