Effects of Antenna Arrays on Broadband Signals.

Abstract

This paper develops a complex, baseband model for an adaptive array. The array is assumed to have N isotropic elements. Only two aspects of arrays are modeled: spatial propagation delays and the weighting coefficients. The array model is used to determine the effects of arrays on wideband signals. The most important finding is that the output of the array consists of the input signal and its time derivatives. Each of these signal components is multiplied by a complex number that is a function of the array and signal parameters. Properties of these complex numbers are investigated. A four element linear array is used as a specific example to illustrate these properties. Two models of the weighting coefficients are analyzed to develope information about 'adaptive' effects. These models are used to show how the array output is degraded by changing coefficients. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1978
Accession Number
ADA064679

Entities

People

  • Edward Raska Jr

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Air Platforms
  • Cyber
  • Energy and Power Technologies
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Antenna Arrays
  • Antenna Radiation Patterns
  • Antennas
  • Bandwidth
  • Bessel Functions
  • Broadband
  • Complex Numbers
  • Computer Programs
  • Computers
  • Control Systems
  • Frequency
  • Frequency Domain
  • Linear Arrays
  • Operating Systems
  • Plastic Explosives
  • Radiation Patterns
  • Random Variables

Fields of Study

  • Engineering

Readers

  • Approximation Theory.
  • Computational Modeling and Simulation
  • Phased Array Antenna Design.