| 摘要 |
PURPOSE:To constitute an antenna usable for three waves in common by a single antenna by arranging an AM/FM wave reception antenna element to a part of a supporting pole of an ultrashort wave antenna element of non- grounded type and introducing an ultrashort wave coaxial feeding cable into the cabin along the AM/FM wave reception antenna element. CONSTITUTION:A base end of the AM/FM wave reception antenna element 3 is fitted to the cabin 1 and the non-grounded type ultrashort wave antenna element 4 is arranged to the upper end of the AM/FM wave reception antenna element so that the vertical planer beam is directed in the horizontal direction. Then one end of the ultrashort wave coaxial feeding cable 5 is connected to the feeding part of the non-grounded ultrashort wave antenna element, the other end of said coaxial feeding cable is introduced into the cabin along the AM/FM wave reception antenna element, the antenna connection end of a characteristic compensation electric circuit 7 is connected to the feeding part of the AM/FM wave reception antenna element and the AM/FM wave feeding cable 8 is connected to the feeding cable connection terminal of said characteristic compensation electric circuit. |
