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    • 1. 发明授权
    • Antenna for mounting on vehicle, antenna element and manufacturing method thereof
    • 车载天线,天线元件及其制造方法
    • US06271804B1
    • 2001-08-07
    • US09476796
    • 1999-12-30
    • Wasuke YanagisawaRyo HorieShozaburo KamedaTakao KawaharaTomio AnbeKatsuo Miki
    • Wasuke YanagisawaRyo HorieShozaburo KamedaTakao KawaharaTomio AnbeKatsuo Miki
    • H01Q136
    • H01Q11/08H01Q1/085H01Q1/3275H01Q1/362H01Q1/40H01Q5/357H01Q9/36H01Q9/42
    • An antenna for mounting on a vehicle which restrains damping of a signal voltage by reducing a stray capacitance of a signal path and has an improved antenna characteristic and a short physical length, and an antenna element which is suitable for an antenna for mounting on a vehicle and is flexible by using a helical coil of a large winding diameter are provided. In the antenna for mounting on a vehicle, with respect to a band signal having a short wavelength of a plurality of band signals to be transmitted/received, an antenna element is caused to resonate with a physical length shorter than ¼ of the wavelength of the band signal. A linear line portion is provided at the proximal end, and the antenna element is provided at a predetermined distance from vehicle body and a conductive member of the same electric potential as the vehicle body. The stray capacitance between the proximal end portion of the antenna element and the vehicle body is small, and a signal voltage is outputted without being damped. The antenna element is formed by burying a helical coil coaxially into a flexible insulating resin pipe. The pitch of the helical coil is not shifted even when it is bent repeatedly. Also, no sink mark is generated in the insulating resin pipe.
    • 一种用于安装在车辆上的天线,其通过减小信号路径的杂散电容来限制信号电压的阻尼,并且具有改善的天线特性和短的物理长度,以及适合于安装在车辆上的天线的天线元件 并且通过使用具有大的卷绕直径的螺旋线圈是灵活的。 在用于安装在车辆上的天线中,相对于要发射/接收的多个频带信号的波长较短的频带信号,使天线元件与短于波长的波长的1/4的物理长度谐振 频带信号。 在近端设有直线部分,天线元件设置在与车体预定的距离和与车体相同电位的导电部件上。 天线元件的基端部与车体之间的杂散电容小,信号电压不被阻尼而输出。 天线元件通过将螺旋线圈同轴地埋入柔性绝缘树脂管中而形成。 螺旋线圈的间距即使在重复弯曲时也不会偏移。 另外,在绝缘树脂管中不产生凹痕。