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实用新型
CN202905937U 路侧设备的阵列天线及电子不停车收费系统 失效 - 权利终止

路侧设备的阵列天线及电子不停车收费系统
摘要：
本实用新型提供一种路侧设备的阵列天线及ETC系统，主要包括，天线矩阵，和与天线矩阵连接的馈电网络，天线矩阵包括至少12个天线阵元，天线矩阵中的每一行围绕天线矩阵的列中心线对称分布，每一行在天线矩阵的中心线的两边分别分布3个天线阵元，馈电网络包括级联的阻抗变换段，每个天线阵元的内部刻蚀方形孔。该路侧设备的阵列天线为有效调节天线阵元的尺寸，在天线方形阵元内部刻蚀方形孔。为实现右旋圆极化效果，在方孔内部-45°对称角上增加等边直角三角形。同时采用高输入阻抗的天线阵元，能够有效减小馈电网络对天线整体性能的影响，减小馈电网络的损耗。
摘要（英）：

The utility model provides an array antenna of a roadside unit and an electronic toll collection (ETC) system. The array antenna mainly comprises an antenna matrix, and a feed network connected with the antenna matrix, wherein the antenna matrix comprises at least 12 antenna elements, each row in the antenna matrix is symmetrically distributed around a column center line of the antenna matrix, two sides of a center line of each row in the antenna matrix are respectively provided with 3 antenna elements, the feed network comprises cascaded impedance conversion sections, and a square hole is etched in the interior of each antenna element. According to the array antenna of the roadside unit, the square holes are eched in the interior of the antenna elements so as to effectively adjust the size of the antenna elements; equilateral right-angled triangles are added at symmetric corners of -45 degrees in the square holes so as to realize the right-handed circular polarization effect; and by adopting the antenna elements of high input impedance, the influence of the feed network on the overall performance of the antenna can be effectively reduced, and the loss of the feed network can be reduced.

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