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    • 1. 发明授权
    • Multi-frequency slot antenna apparatus
    • 多频天线装置
    • US06664931B1
    • 2003-12-16
    • US10201015
    • 2002-07-23
    • Henry H. NguyenMichael S. Pieper
    • Henry H. NguyenMichael S. Pieper
    • H01Q1310
    • H01Q13/10H01Q1/243H01Q1/38H01Q5/357H01Q5/40
    • A multi-frequency antenna apparatus includes an open-ended slot antenna (20) operable at high frequencies, cascaded in series with a antenna element (22) operable at low frequencies, results in two distinct antennas fed by a single excitation port (33). A U-shaped conductive strip (21) defining the slot antenna (20) has a ground connection (37) at one end near the open-ended side of the slot antenna (20) and a virtual feed point (30) on the other end coupled to the antenna element (22). The electrical length from the ground connection (37) to the feed point is about ¼ of a wavelength of the first frequency creating a virtual open at the feed point (30).
    • 多频天线装置包括可在高频下工作的开放式时隙天线(20),其与可在低频操作的天线元件(22)串联,导致由单个激励端口(33)馈送的两个不同的天线, 。 限定缝隙天线(20)的U形导电条(21)在靠近缝隙天线(20)的开放端侧的一端具有接地连接(37)和在另一端的虚拟馈电点(30) 端部耦合到天线元件(22)。 从接地连接(37)到馈电点的电气长度约为第一频率波长的1/4,在馈电点(30)处产生虚拟的开路。