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    Licence plate
    12.
    发明申请
    Licence plate 审中-公开
    车牌

    公开(公告)号：US20080042848A1

    公开(公告)日：2008-02-21

    申请号：US11598908

    申请日：2006-11-14

    Applicant: Arthur Roberts ,  Mathias Martin Ernerst Ehlen

    Inventor： Arthur Roberts ,  Mathias Martin Ernerst Ehlen

    IPC: G08B13/14

    CPC classification number: G08G1/017 ,  B60R13/10 ,  B60R13/105 ,  G06K19/04 ,  G06K19/07758 ,  H01Q9/30 ,  H01Q11/08

    Abstract: The present invention relates to vehicle license plates and a method of making vehicle license plates having an integrated antenna for use with radio frequency identification (RFID) devices. In a preferred form, the license plate 10 of the present invention comprises a conductive sheet 12 forming at least part of the license plate 10, a slot 14 or notch provided on the conductive sheet 12, and a radio frequency transponder operatively coupled to the conductive sheet 12 to use the slot 14 or notch as an antenna.

    Abstract translation: 本发明涉及车辆牌照和制造具有与射频识别（RFID）装置一起使用的集成天线的车牌照的方法。 在优选形式中，本发明的牌照10包括形成车牌10的至少一部分的导电片12，设置在导电片12上的槽14或槽口，以及可操作地耦合到导电片的射频转发器 片12使用槽14或槽作为天线。

    Dual polarised patch-radiating element
    14.
    发明授权
    Dual polarised patch-radiating element 失效
    双极化贴片辐射元件

    公开(公告)号：US06236367B1

    公开(公告)日：2001-05-22

    申请号：US09160914

    申请日：1998-09-25

    Applicant: Cornelis Frederik Du Toit ,  Mathias Martin Ernest Ehlen ,  Richard John Hutchinson ,  John Heywood Thomson

    Inventor： Cornelis Frederik Du Toit ,  Mathias Martin Ernest Ehlen ,  Richard John Hutchinson ,  John Heywood Thomson

    IPC: H01Q138

    CPC classification number: H01Q9/0414 ,  H01Q9/0407 ,  H01Q9/0428 ,  H01Q9/0435 ,  H01Q9/0471

    Abstract: A radiating element for dual polarised operation in a linear antenna array is disclosed. The radiating element is a dual polarised radiating patch element consisting of a ground plane, a lower patch, an upper patch and parasitic elements. The lower patch and upper patch are stacked above the ground plane in a spaced apart relationship. The parasitic elements lie in the same plane as the lateral edges of the lower patch. Supports are used to hold the patches and the parasitic elements in a spaced apart relationship. The parasitic elements are fed from a central area of the lower patch by microstrips. The ground plane has apertures which are of a dumbbell shape to achieve the same effective length as long apertures. Orthogonally disposed strip type driven elements span across the central portions of the apertures and the length of these strips is selected to achieve the desired matchings. The feed to the driven elements will typically form part of a feed network etched onto a PCB mounted adjacent to the ground plane with conducting elements facing away from the ground plane. One requirement of this device is that the return loss at each port must satisfy a certain minimum level over a given frequency band. This is satisfied by employing an aperture coupled stacked patched configuration. Another requirement is that isolation between the two ports has to satisfy a certain minimum allowed level which is achieved by obtaining almost perfuect symmetry in one plane. In order to narrow the beam width for the vertically polarised radiation parasitic elements are provided which are feed from a region located near the middle of the lower patch via microstrips.

    Abstract translation: 公开了一种用于线性天线阵列中的双极化操作的辐射元件。 辐射元件是由接地平面，下部贴片，上部贴片和寄生元件组成的双极化辐射贴片元件。 下贴片和上贴片以间隔开的关系堆叠在地平面上方。 寄生元件位于与下贴片的侧边缘相同的平面上。 支撑件用于将贴片和寄生元件保持间隔开的关系。 寄生元件通过微带从下部贴片的中心区域供给。 接地平面具有哑铃形状的孔，以实现与长孔相同的有效长度。 正交设置的带式驱动元件跨过孔的中心部分，并且选择这些条的长度以实现期望的匹配。 被驱动元件的馈送通常将形成蚀刻到邻近接地平面安装的PCB上的馈电网络的一部分，其中导电元件背离接地平面。 该设备的一个要求是每个端口的回波损耗必须在给定频带上满足一定的最小电平。 这通过采用孔耦合堆叠修补配置来满足。 另一个要求是两个端口之间的隔离必须满足一定的最小允许电平，这通过在一个平面中获得几乎完美的对称性来实现。 为了减小垂直极化辐射的光束宽度，提供了从经由微带的下贴片中间附近的区域进给的寄生元件。

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