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    • 3. 发明申请
    • BROADBAND WHIP ANTENNA
    • 宽带天线
    • US20100283699A1
    • 2010-11-11
    • US12436375
    • 2009-05-06
    • John T. APOSTOLOSJudy FENGWilliam MOUYOS
    • John T. APOSTOLOSJudy FENGWilliam MOUYOS
    • H01Q5/00H01Q9/16
    • H01Q9/16H01Q1/3275H01Q5/314H01Q5/378H01Q5/40H01Q9/32
    • A shortened multi-band antenna includes in-line dipoles, selected elements of which having shielded meanderline chokes to be able to switch from an extended dipole at the lower VHF frequencies to a shortened dipole for the UHF band. Additionally, the staggered asymmetric meanderline configuration permits overall size reduction, whereas antenna construction includes an intermediate fiberglass layer over which conductive foil is placed for tuning and for parasitic radiator purposes to improve the gain of the UHF dipole in the upper regions of the band at 450 megahertz. Additionally, at the low end of the 30 megahertz band a sleeve is positioned between the base of the lowest dipole element and ground, with the sleeve provided with two parallel RLC circuits tuned to different bands to improve VSWR at the low end of the VHF band and to eliminate unwanted nulls.
    • 缩短的多频带天线包括在线偶极子,其选择的元件具有屏蔽的曲折线扼流圈,以能够从低VHF频率处的扩展偶极子切换到UHF频带的缩短的偶极子。 另外,交错的不对称曲折线配置允许总体尺寸减小,而天线结构包括中间玻璃纤维层,导电箔放置在该中间玻璃纤维层上,用于调谐和用于寄生散热器目的,以改善在450的带的上部区域中的UHF偶极子的增益 兆赫。 另外,在30兆赫兹频带的低端,套筒位于最低偶极子元件的基极和接地之间,套筒设有两个并联的RLC电路,调谐到不同的频带,以改善VHF频段低端的VSWR 并消除不需要的空值。