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    • 7. 发明授权
    • Portable RF antenna
    • 便携式射频天线
    • US5703602A
    • 1997-12-30
    • US663883
    • 1996-06-14
    • Matthew Phillip Casebolt
    • Matthew Phillip Casebolt
    • H01Q1/08H01Q1/24
    • H01Q1/084H01Q1/244
    • A small, collapsible, high-gain, dipole antenna and a method to make the antenna. The present invention provides a collapsible half-wavelength dipole antenna for use in a portable device, the antenna having a fully collapsed position and a fully extended position. The antenna includes a static dipole arm, and a movable dipole arm. The movable dipole arm is capable of being moved to the fully collapsed position and the fully extended position. The antenna also includes a balun feed assembly electrically coupled to the static dipole arm and to the movable dipole arm. The antenna is capable of transmitting and receiving electrical signals in either the fully collapsed position or the fully extended position. The balun feed assembly is fixed to the static dipole arm, and the movable dipole arm is movably coupled to the balun feed assembly. According to specific embodiments, the antenna may include a static dipole arm positioned adjacent and parallel to the balun feed assembly to provide a folded dipole antenna when in the fully collapsed position. In accordance with other embodiments, the movable dipole arm of the present antenna may be, for example, retracted or rotated into its collapsed position.
    • 小型,可折叠,高增益,偶极子天线以及制造天线的方法。 本发明提供一种用于便携式设备的可折叠半波长偶极天线,天线具有完全折叠位置和完全伸出位置。 天线包括静态偶极臂和可移动偶极臂。 可移动偶极臂能够移动到完全折叠位置和完全伸出位置。 天线还包括电耦合到静态偶极臂和可移动偶极臂的平衡 - 不平衡变压器馈送组件。 该天线能够在完全折叠位置或完全伸出位置发送和接收电信号。 平衡 - 不平衡转换器组件固定到静态偶极臂上,并且可移动偶极臂可移动地联接到平衡 - 不平衡变压器馈送组件。 根据具体实施例,天线可以包括邻近并平行平衡 - 不平衡转换器组件定位的静态偶极臂,以在处于完全折叠位置时提供折叠偶极子天线。 根据其他实施例,本天线的可移动偶极臂可以例如缩回或旋转到其折叠位置。