| 摘要 |
<p>An on-board antenna device, comprises a radiation element (22) formed on an inner-surface of a window glass (51) for a vehicle (50), a base plate (405) having an opening, the base plate (405) being fixed on the inner-surface of the window glass (51) so as to surround the radiation element (22), and a housing (27) assembled onto the base plate (405), the housing (27) having an opening surrounding the radiation element, wherein the base plate has four leakage prevention walls (405b, 405c, 405d and 405e) and each of four leakage prevention walls (405b, 405c, 405d and 405e) has a surface substantially parallel to each of four sidewalls (430b, 430c, 430d and 430e) of the housing (27).</p> |
