| 摘要 |
The invention refers to a switch-over network for microwave energy comprising a cascade arrangement of directional couplers (A1, A3, A5) which receive microwave energy from an input (I) and each leads energy to different outputs (01,02,03). Each directional coupler has a number of narrow pass-bands, of which the pass band for each directional coupler is shifted in relation to each other so that energy can selectively be led to a desired output (01,02,03) through the suitable choice of that to the input (I) of the transported energy's frequency. Some directional couplers can have a common pass-band and in order to be able to divide up the energy between several outputs the first directional coupler has or the first directional couplers, which have a common pass-band with subsequent directional couplers, a controllable reflex device (M) which is made active at the choice of a frequency which falls within a such common pass-band and thereby produces a controlled misadjustment at the given directional coupler. The switch-over network can e.g. be a part of a feeder arrangement for a group antennae.<IMAGE> |
