×

Satellites and signal distribution methods and off-set pattern for sending signals

  • US 8,238,816 B2
  • Filed: 10/11/2005
  • Issued: 08/07/2012
  • Est. Priority Date: 10/11/2005
  • Status: Expired due to Fees
First Claim
Patent Images

1. A satellite comprising an arrangement of spot-beam antennas for covering a predetermined geographic area of interest within which geographic area there are multiple separate and distinguishable sub-areas, wherein the antennas produce at least two identical and orthogonal patterns of spot-beams on opposite polarizations, and the second pattern (Pattern 2) is offset with respect to the first pattern (Pattern 1) such that the amount of straddling between sub-areas covered by adjacent spot-beams arising from the Pattern 1 and Pattern 2 is substantially avoided, and wherein the antennas are arranged to direct spot-beams so that no parts within the predetermined geographic area of interest are not covered, and wherein each spot-beam is assigned a frequency band consistent with the amount of frequency re-use desired within a sub-area to be covered by the spot-beam and subject to the amount of acceptable self interference, and wherein each spot-beam is assigned a spectrum segment and the spectrum segment may be any fraction of the total available bandwidth of the arrangement of spot-beams.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×