Experiments in Weight Design for a Sombrero Array Pattern

Abstract

There is an interest in developing a transmit array taper that illuminates both a highly directive cluster of receive beams and a broad region of the sky at a level that can support a ubiquitous radar function. This report provides experimental optimization results of a sombrero-shaped amplitude array taper that can be used to implement two simultaneous functions of this type. The amplitude tapers are optimized in two ways: boresight radiated power density is fixed while minimizing either max total transmitter power required or max element power required. This report also presents experiments with nonoptimized linear-FM and nonlinear-FM phase-only tapers. The phase-only tapers do improve the peak level loss that occurs in the amplitude optimizations. We do not have the capability to optimize phase-only weights, but intend to give a designer a starting point for exploring phase-only optimization of a sombrero-shaped array factor.

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Document Details

Document Type
Technical Report
Publication Date
Jun 25, 2010
Accession Number
ADA523246

Entities

People

  • Dan P. Scholnik
  • Jeffrey O. Coleman
  • Kelly R. Mcphail

Organizations

  • United States Naval Research Laboratory

Tags

DTIC Thesaurus Topics

  • Amplifiers
  • Bandwidth
  • Beam Steering
  • Energy Levels
  • Far Field
  • Frequency
  • Genetic Algorithms
  • Geometry
  • Grids
  • Heuristic Methods
  • Integrals
  • Military Research
  • Optical Lattices
  • Optimization
  • Pencil Beams
  • Radar
  • Signal Processing

Fields of Study

  • Physics

Readers

  • Phased Array Antenna Design.
  • Systems Analysis and Design