• A REVIEW OF MULTIPLE BEAM ANTENNA ARRAY TRADEOFFS

      Hansen, R. C.; Pacific Missile Test Center (International Foundation for Telemetering, 1986-10)
      Telemetry instrumentation antennas often require several beams to allow simultaneous tracking of several targets. These multiple beams can be provided several ways, including multiple beam antennas and phased arrays. A brief review of the tradeoffs involved in implementing multiple beams with phased arrays is given. Planar arrays, which may be combined to provide wide angular coverage, include a corporate feed giving multiple independent beams, a distributed configuration with independent beams, the Butler beamformer, and the Gent-Rotman beamformer. Conformal implementations include cylindrical and conical arrays, and the spherical dome lens.