An Improved Design Method of Symmetrical Multiplexers

In order to solve the problem of many signal transmission, this paper studies the same prototype low pass filter and gets the direct design formulas for symmetric band pass channel multiplexers, which allows rapid design of the channel multiplexers using direct-coupled resonator filters. Computed results for a prototype multiplexer are given with optimized technique, and results are presented for a symmetric passive multiplexer, which demonstrate the high performance possible using the improved technique.