发明名称 |
Automotive window glass antenna. |
摘要 |
<p>A second antenna is additionally provided to a vehicle rear window glass in order to prevent a fall or dip of the gain of the antenna system in a particular direction or directions for thereby improving the directivity characteristic and increasing the gain. The second antenna consists of a feed point and a pair of first and second elements connected to the feed point. The first element has in an area of the space above a first antenna or in a space defined between the upper and lower ends of a first antenna, at least one horizontal conductive strip. In one embodiment in which the feed point is arranged in a marginal area of the space under the defogging heater element, the first element further has a vertical conductive strip arranged in an area of the space between the heater element and a lateral edge of the window glass. The second element is arranged in an area of the space under the defogging heater element and made up of a conductive strip assembly of various shapes such as &sqsup& -shape, a rectangular loop or loops, T-shape. In another embodiment in which the feed point is arranged in an area of the space above the heater element, the second element further has a vertical conductive strip arranged in an area of the space between the heater element and a lateral edge of the window glass. The second element is connected to a bus bar or a heating strip of the defogging heater element in order to further increase the gain of the antenna system in all directions. <IMAGE> <IMAGE> <IMAGE> <IMAGE> <IMAGE> <IMAGE> <IMAGE></p> |
申请公布号 |
EP0591957(A2) |
申请公布日期 |
1994.04.13 |
申请号 |
EP19930116192 |
申请日期 |
1993.10.06 |
申请人 |
CENTRAL GLASS COMPANY, LIMITED |
发明人 |
OHNISHI, MASAHIRO;NAGAYAMA, YOJI;TADOKORO, SHINGO |
分类号 |
H01Q1/32;H01Q1/12;(IPC1-7):H01Q1/12 |
主分类号 |
H01Q1/32 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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