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MULTI-BEAM TELECOMMUNICATION ANTENNA ONBOARD A HIGH-CAPACITY SATELLITE AND RELATED TELECOMMUNICATION SYSTEM

  • US 20120075149A1
  • Filed: 09/09/2011
  • Published: 03/29/2012
  • Est. Priority Date: 09/10/2010
  • Status: Active Grant
First Claim
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1. A multi-beam telecommunication antenna intended to equip a high-throughput telecommunication payload to cover, in transmission and/or reception, a geographic area from a geostationary orbit, able to be mechanically mounted on one or two satellite platforms and to be electromagnetically coupled to a repeater, comprising:

  • at least one radioelectric reflector, andan associated feed block, formed by a plurality of elementary radioelectric feeds arranged in a plane,the plurality of elementary radioelectric feeds being configured to illuminate the reflector by electromagnetic radiation in a frequency band and/or to be illuminated by electromagnetic radiation in a frequency band reflected by the reflector according to a primary multi-beam set of adjacent primary beams distributed in at least one spatially connected set of adjacent primary beams, any two adjacent primary beams being separated by a first angular separation θ

    S1,the reflector being configured to reflect part of the electromagnetic energy emitted by the feed block and/or to intercept part of the electromagnetic energy emitted from the geographical area, according to a secondary multi-beam set of secondary adjacent reflected beams in at least one spatially connected set of adjacent secondary beams, any two adjacent secondary beams being separated by a second angular separation θ

    S2,whereinthe reflector is unique, andthe feed block is dimensioned and arranged so that each feed can generate and/or receive a different unique beam and so that the first angular separation θ

    S1 is substantially equal to the second angular separation θ

    S2, andthe spillover energy losses associated with each feed are between 3 and 10 dB, preferably between 3 and 7.5 dB.

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