| 摘要 |
The changeover unit incorporates at least one wave conductor (10) which has a number of coupling units distributed along its length. The coupling units are connected via separate transmission leads (21) with each of the aerial or feeder installations (20), and by selectively activatable changeover components may be moved between an active position where they connect the aerial or feeder installation and the wave conductor, and one inactive where they are completely sepd. from the wave conductor. In the transmission path between the transmitter and receiver and the ends of the wave conductor is a changeover switch (27) permitting rapid connection of the aerial or feeder installations (20) to the transmitter and receiver through the effect of the corresp. coupling units. |
