| 摘要 |
PURPOSE:To improve the gain an antenna element by providing a transparent electroconductive film having hot-wire type reflecting performance onto a glass plate face and providing an antenna conductor near the transparent electroconductive film so as to apply capacitive coupling between the antenna conductor and the transparent electroconductive film. CONSTITUTION:The transparent electroconductive film 3 having the hot-wire type reflecting performance having a cooling/heating load reduction function is provided to a comparatively wide plane of the glass plate 1 used as window glass at proper positions of an automobile except an insulating zone 2 at the ridge of the glass plate 1. Further, the antenna conductor 4 is provided closely to a space plane 5 of the glass plate 1 not provided with the transparent electroconductive film 3 so as to attain high frequency transmission/reception through the capacitance coupling with the transparent electroconductive film 3. The antenna conductor 4 is formed to be a wire such as a conductive thin metallic wire or a sintered printed wire or formed to be a film such as a transparent/opaque electroconductive film or an electroconductive film having hot-wire reflecting performance. Further, it is preferred to part equally the gap between the transparent electroconductive film 3 and the antenna conductor 4 in a range of 1.0-5.0mm so as to attain the capacitive coupling. |
