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    • 3. 发明授权
    • Compact diversity antenna with weak back near fields
    • 小背景近场紧凑型分集天线
    • US5784032A
    • 1998-07-21
    • US551547
    • 1995-11-01
    • Ronald H. JohnstonLaurent Joseph Levesque
    • Ronald H. JohnstonLaurent Joseph Levesque
    • H01Q1/24H01Q3/24H01Q7/00H01Q21/28
    • H01Q7/00H01Q1/243H01Q21/28H01Q3/24
    • A compact diversity antenna is presented consisting of two electrically isolated orthogonal loop conductors joined at a midpoint. This midpoint is also electrically attached to a vertical conductor which produces a third mode of operation electrically isolated from the first modes. The two horizontal conductors and the vertical conductor may be constructed to have various relationships with a ground plane of various shapes and sizes. Some of the possible feed arrangements for each of the antennas is presented as well as matching and tuning circuits. All three antenna elements are found to have relatively weak near electric and magnetic fields on the ground plane side of the antenna where the ground plane is small in extent. This feature provides for reduced radiation into the head and neck of the cellular phone user.
    • 提出了一种紧凑的分集天线,由在中点连接的两个电隔离的正交环形导体组成。 该中点也电连接到垂直导体,其产生与第一模式电隔离的第三操作模式。 两个水平导体和垂直导体可以构造成与各种形状和尺寸的接地平面具有各种关系。 呈现每个天线的一些可能的馈送布置以及匹配和调谐电路。 发现所有三个天线元件在天线的接地平面侧具有相对弱的接近电场和磁场,其中接地平面的程度小。 该特征提供了减少到蜂窝电话用户的头颈部的辐射。