| 摘要 |
A duplexer 24 comprising substantially semi-cylindrical filters 1 and 5 is disposed in and made integral with an increased diameter hollow stem part 29 of a substantially rod-like antenna element 22. The two filters 1 and 5 are coupled together by a coupler substrate 8 interposed between them. The coupler substrate 8 is disposed between the two filters 1 and 5 for forming a connector 23, which is connected to the antenna element 22. This assembly is connected by connector pieces 25 to 27 to a transmitter and a receiver part of a radio part of a portable telephone set or the like. |
