| 摘要 |
The multiplexer-demultiplexer operates in the 3.6 to 4.2, 5.9 to 6.4 and 6.4 to 7.1 kmc frequency bands. For demultiplexing, for example, the system operates as follows: Two serially arranged directional couplers respectively deliver the vertically-polarized signals of the first frequency band and the horizontally-polarized signals of the first frequency band to two outputs of the system, and the remainder of the signals received from the antenna to a polarizer. The latter feeds two waveguides with respective stubs and matching networks, forming the first branches of two Y-junctions; each one of the other branches of these Y-junctions feeds a filter. The four corresponding filters, whose outputs form other outputs of the system, respectively deliver the horizontally-polarized signals in the 6.2 to 6.4 kmc and 6.7 to 7.1 kmc frequency sub-ranges and the vertically-polarized signals in the 5.9 to 6.2 kmc and 6.4 to 6.7 kmc frequency sub-ranges. |
