Abstract
In a multi user communication environment such
as communication satellites, inter-channel isolation is
provided by channelizing/multiplexing networks that splits
composite wideband signal into various narrowband RF
signals corresponding to each user. In a communication
satellite transponder, input multiplexing network is placed
at the output of low noise receiver. It divides the composite
received signal into various narrowband signals and
controls the interference among the channels below certain
level. The stringent isolation requirements of these networks
require the channel filters to have transmission zeros to be
placed just outside the passband. This paper describes the
electrical design of a 5-channels C-band input multiplexer
(IMUX). Comparative analysis of different multiplexer
configurations is described in detail. Among different
available filter technologies for realization, dual mode
circular waveguide technology is an optimum choice. In
order to meet the in-band performance requirements, 10th
order channel filters were realized with four transmission
zeros for stopband rejection and four transmission zeros for
group delay equalization (10-4-4). System-level simulation of
of the multiplexer is performed and the simulation show
good agreement with design requirements.
Muhammad Latif, Abaid Ullah Salfi. (2015) Design of 5-Channel C-Band Input Multiplexer for Communication Satellites, Journal of Space Technology , Volume 5, Issue 1.
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