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Mobile communication satellite payload

  • US 5,548,292 A
  • Filed: 02/02/1995
  • Issued: 08/20/1996
  • Est. Priority Date: 05/07/1993
  • Status: Expired due to Fees
First Claim
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1. A phased array transmitter antenna assembly, comprising:

  • n transmitter elements arranged in a predetermined pattern, each of said n transmitter elements having power amplifier means associated therewith, each of said power amplifier means having an output coupled into free space at said associated one of said n transmitter elements;

    m beam forming circuit means, individual ones of said m beam forming circuit means being disposed one upon another in a stacked fashion beneath said n transmitter elements, each of said m beam forming circuit means having n outputs, an individual one of said m beam forming circuit means having an input for receiving one of m input signals and being comprised of a multi-level arrangement comprised of a plurality of cascaded one input/two output power dividers, wherein a first level has 2°

    power dividers, a second level has 21 power dividers, a third level has 22 power dividers and so forth until in a last level there are at least n/2 said power dividers having a total of at least n output ports forming said n outputs of said individual one said m beam forming circuit means; and

    n m-way power combiner means coupled to said m beam forming circuit means, each of said m-way power combiner means having individual ones of m inputs coupled to an output of each one of said m beam forming circuit means, each of said n m-way power combiner means having an output coupled to one of said power amplifier means associated with one of said n transmitter elements.

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