| 摘要 |
The invention relates to an arrangement for measuring the condition an antenna in a mobile telephone system. The arrangement comprises an antenna (1); a transmission line (2); a radio equipment (4) connected to the antenna via the transmission line (2) and belonging to the mobile telephone system, the radio equipment being, for example, a receiver, a transmitter or a transceiver; and a masthead amplifier (6) at that end section of the transmission line which is close to the antenna. The masthead amplifier, in turn, comprises a duplex filter (7), an RX branch (8), a TX branch (9), and an amplifier element in the RX branch. The arrangement further comprises means (15, 15a, 15b, 16) for measuring the standing wave ratio and for calculating its measuring value, and data processing means (20) connected with the means (15, 15a, 15b, 16) measuring the standing wave ratio and calculating the value. In the invention, the means (15, 15a, 15b, 16) for measuring the standing wave ratio and for calculating the value are arranged to make the measurement and calculation within that end section of the transmission line which is close to the antenna. <IMAGE> |
