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公开(公告)号：US4907006A
公开(公告)日：1990-03-06
申请号：US321271
申请日：1989-03-09
CPC分类号： H01Q1/405 , H01Q1/32 , H01Q19/005 , H01Q5/378
摘要： An antenna to be mounted on a vehicle. The antenna includes a ground plate with an L-shaped radiator plate and an L-shaped sub-radiator plate. One leg of the radiator plate and sub-radiator plate are parallel to the ground plate. The parallel legs are spaced from the ground plate. The other leg is perpendicular to the ground plate. The perpendicular leg is separated from the ground plate by a small gap. The two legs are opposed to each other with a gap between the legs parallel to the ground plate. In some embodiments, filler is placed between the plates.
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公开(公告)号：US5166693A
公开(公告)日：1992-11-24
申请号：US629653
申请日：1990-12-07
CPC分类号： H01Q3/2605 , H01Q1/3233 , H01Q21/065
摘要： In mobile communications, it is required that the beam direction is maintained to track the desired direction as the mobile is moving. For such a purpose, the mobile includes an angular rate sensor mounted therein which detects the state of turn in the mobile and to control the beam direction of the antenna in accordance with the state of turn as well as the strength of radiowave received by a receiver in the mobile. Antenna elements are in the form of microstrip antenna and are arranged in plane on the same dielectric substrate. Feeding and drive circuit layers for controlling the transmission and reception at the antenna elements are stacked into a single layered unit. This enables the antenna system to be formed into a low-profile structure. The dielectric substrate of the microstrip antenna element is formed by stacking a plurality of dielectric substrate different in dielectric constant from one another. It is thus intended that the band width of the antenna is increased and that the mutual coupling between the antenna elements is reduced to prevent the gain of the antenna from being lowered. Furthermore, the position of feed points in the antenna element are rotated against each adjacent antenna element. This can improve the axial ratio in the array antenna over a wide band width.
摘要翻译： 在移动通信中，要求在移动台移动时保持波束方向跟踪所需的方向。 为了这样的目的，移动装置包括安装在其中的角速率传感器，其检测移动台中的转弯状态并且根据转向状态以及由接收器接收到的无线电波的强度来控制天线的波束方向 在手机。 天线元件是微带天线的形式，并且布置在同一电介质基片上的平面上。 用于控制天线元件的发送和接收的馈电和驱动电路层被堆叠成单层单元。 这使得天线系统能够形成为薄型结构。 微带天线元件的电介质基板是通过将不同介电常数彼此不同的多个电介质基板堆叠而形成的。 因此，希望增加天线的带宽，并且降低天线元件之间的相互耦合以防止天线的增益降低。 此外，天线元件中馈电点的位置相对于每个相邻的天线元件旋转。 这可以提高阵列天线在宽带宽上的轴比。
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公开(公告)号：US4949268A
公开(公告)日：1990-08-14
申请号：US247537
申请日：1988-09-22
CPC分类号： G01C21/28 , G01S19/426
摘要： A land vehicle navigation system is adapted to display the present position of a vehicle by receiving signals from a combination of satellites under the global positioning navigation system. The present position of the vehicle is displayed on a screen, superposed over map data. To obtain the best global positioning data, the combination of satellites is selected in connectio with the visibility. To perform the positive reception of signals from the satellites as the vehicle is running in an urban area, data relating to the building height around the area can be obtained from a geographical information section including data indicative of the map and the building height distribution with respect to the area to determine the visibility.
摘要翻译： 陆地车辆导航系统适于通过在全球定位导航系统下接收来自卫星组合的信号来显示车辆的当前位置。 车辆的当前位置显示在屏幕上，叠加在地图数据上。 为了获得最佳的全球定位数据，选择卫星的组合与可视性连接。 为了在车辆在城市地区运行时执行来自卫星的信号的正面接收，可以从包括表示地图和建筑物高度分布的数据的地理信息部分获得与该区域周围的建筑物高度相关的数据， 到该区域确定可见性。
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