A linear array antenna using bifilar helical elements for mobile satellite communications
A linear array antenna using bifilar helical elements for mobile satellite communications
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用于移动卫星通信的使用双线螺旋元件的线性阵列天线
DOI：
10.1109/aps.1994.407917
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发表时间：
1994
期刊：
影响因子：
--
通讯作者：
T. Katagi
中科院分区：
文献类型：
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作者：
Y. Konishi;M. Ohtsuka;M. Matsunaga;T. Katagi
在移动卫星通信系统中，如AMSC/TMI系统[Lunsford等人，1992]，圆极化全向天线对车载天线很有吸引力，因为这些天线不需要任何方位方向的卫星跟踪机制[Ohmori， 1991]。作为一种全向天线，双线螺旋天线被提出[Nakano et al., 1991]。这种天线的直径很细，很方便。然而，这个天线。缺点是波束方向在仰角平面上随频率变化而移动。在本文中，作者提出了一种线性阵列天线，采用沿螺旋轴放置的两个双线螺旋天线单元。讨论了该阵列天线抑制波束方向移动的能力
In mobile satellite communication systems such as the AMSC/TMI system [Lunsford et al., 1992], circularly polarized omni-directional antennas are attractive for vehicle antennas because any satellite tracking mechanism in the azimuth direction is not necessary for these antennas [Ohmori, 1991]. As one type of omni-directional antenna, a bifilar helical antenna has been proposed [Nakano et al., 1991]. This antenna is convenient owing to its thin diameter. However, this antenna. has a disadvantage that the beam direction in an elevation plane moves according to frequency change. In the present paper, the authors propose a linear array antenna using two bifilar helical antenna elements placed along the helix axis. The capability of reduction of beam direction movement is discussed for this array antenna.<<ETX>>