Abstract
AbstractThis 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.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Electronics and Communications in Japan (Part I: Communications)
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
