Symmetrical Number System Phase Sampled Interferometer Direction Finding Antennas

Abstract

A novel phase sampled interferometer Direction Finding (DF) antenna architecture is described. Based on the optimum symmetrical number system (OSNS) the analog spatial filtering operation is broken down into a number of parallel sub operations (moduli) that are of smaller complexity. One two-element interferometer is used for each sub operation and only requires a precision in accordance with its modulus. A much higher spatial resolution is achieved after the different OSNS moduli are used and the filtering results of these low precision sub operations are recombined. The use of the symmetrically folding phase waveform provides for a straight forward implementation of a high resolution DF antenna. Simulated and experimental results are shown to numerically evaluate the feasibility of the design. Spatial encoding errors that may occur due to the angle-of-arrival being located about a code transition point are also quantified.

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Document Details

Document Type
Technical Report
Publication Date
Feb 20, 1998
Accession Number
ADA343391

Entities

People

  • D.C. Jenn
  • P. E. Pace

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Air Platforms
  • Electronic Warfare
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Angle Of Arrival
  • Angle Of Incidence
  • Coding
  • Communication Systems
  • Direction Finding
  • Dynamic Range
  • Engineering
  • Frequency
  • High Resolution
  • Interferometers
  • Measurement
  • Plane Waves
  • Spatial Filtering
  • Transfer Functions
  • Transmission Lines
  • Waveforms
  • Waves

Fields of Study

  • Engineering
  • Physics

Readers

  • Computational Modeling and Simulation
  • Image Processing and Computer Vision.
  • Phased Array Antenna Design.