Wavegulde Multiplexer with Eight Contiguous Channels in X Band

This paper presents theoretical and experimental work which was done upon a waveguide multiplexer with contiguous channels in 20 % frequency bandwidth in X band. The multiplexer consists of two branches joined by circulator. Each branch contains a piece of waveguide shorted at the end with four 7 - cavity waveguide filters with Chebyshev response and 0.1 dB ripple. Filters were arranged at intervals along the broad wall sides. The distances from the short were computed ana optimized to obtain minimum /¿/ at the enter of the branch. Insertion losses within channels were less than 1,5 dB. V.S.V.R better than 10 dB in frequency range of the multiplexer.