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- W1512919634 abstract "This paper describes the design and development result of high-power (over 100 W) channel multiplexers for broadcasting satellite transponders in the 12-GHz band. The input multiplexer which requires steep attenuation characteristics consists of two light-pole canonical dual-mode filters with an orthomode T-shaped junction suitable for waveguide manifolds. Attenuation at adjacent channel edges AP is 40 dB, insertion loss at channel center A0 is 1.4 dB, and amplitude variation AV = 0.6 dBP-P. The output multiplexer which requires low insertion loss consists of four-pole longitudinal dual-mode filters. To decrease insertion loss, several considerations are applied such as use of the TE113 mode, optimization of coupling apertures and materials of tuning screws. The characteristics of a fabricated four-channel multiplexer (A = 15 dB, A0 = 0.6 dB, AV = 0.3 dBP-P) are shown to be unchanged in the thermal test. These multiplexers can satisfy the necessary characteristics required to channel multiplexers for high-power broadcasting satellite transponders in the 12-GHz band." @default.
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- W1512919634 title "Channel multiplexers for broadcasting satellite transponders in the 12 Ghz band" @default.
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- W1512919634 doi "https://doi.org/10.1002/ecja.4410680511" @default.
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