Multimedia Satellite Equipment - NG IMUX (Next Generation Input Multiplexer)

Objectives

The increasing demand for satellite capacity will require the extension of the currently used bands to the Ka-band. However, the most advanced input multiplexers in Ka-band do not yet exploit the volume and size reductions as experienced at lower frequencies by the use of dielectrics. Therefore, a further step to make waveguide input multiplexers more efficient is required.

The objective of the project is to develop, build and qualify a Ka-band input multiplexer with:

  • Reduced dimensions of filter resonators,
  • Improved electrical performance without external equalisation,
  • Reduced number of circulators,
  • Thereby reduced number of parts and improved reliability,
  • Dramatically reduced footprint area,
  • Reduced mass.

Features

Input multiplexers constitute a basic element in the payload of a telecommunication satellite. They connect a reception antenna to the channel amplifiers.

Project Plan

The project has 4 main phases:

  • Design trade-offs,
  • Breadboarding,
  • EQM development and manufacturing,
  • Qualification testing.

Challenges

Key issues are:

  • Advancement of design software,
  • Electrical optimisation,
  • Mechanical design.

Benefits

Expected benefits brought by the project are:

  • Improved electrical performances,
  • Reduced mass,
  • Reduced footprint,
  • Improved reliability by reduced number of parts.

Current Status (dated: 22 Dec 2005)

EQM qualification successfully completed, first FM contract with 10 channels based on this design successfully completed also.