| 摘要 |
PURPOSE:To prevent a change in an antenna characteristic and interference between communication equipments and to attain the use of the antenna system for plural communication equipments by connecting individually an antenna feed point and plural connecting terminals with separate communication equipments connected thereto. CONSTITUTION:One terminal of a feeding line L1 connects to a feeding point Q1 of an antenna Ant and one terminal of a feeding line L2 connects to a feeding point Q2 respectively and connecting terminals P1, P2 for connecting communication equipments are connected to the other terminal of each feeding line. For example, a transmitter connects to the connecting terminal P1 and a receiver connects to the connecting terminal P2, then a matching device C1 matching the impedance of the transmitter and the point Q1 is interposed into the line L1 and a filter C2 preventing a bypass route by the transmitter is interposed in the line L2. In this case, when the devices C1,C2 are equipped in a shield case covering each feeding point, disturbance due to noise is prevented and the size is made small. |
