Design and Development of Butler Matrices for Circular Array Beamforming

Abstract

Antennas that have elements placed in a circular fashion require complex beamforming strategies as each element has a different pointing direction and thus the overall radiation pattern cannot be simplified as for planar arrays. However by transforming the circular elements into phase modes using a passive Butler matrix we can create elements that now behave similar to elements in a planar array. In this report we describe how to design these wideband Butler matrices using fixed-value differential phase shifters with microstrip techniques. The details of the design and simulated performance are presented for a complete 4 X 4 and a 8 X 8 Butler matrix.

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Document Details

Document Type
Technical Report
Publication Date
Sep 22, 2020
Accession Number
AD1110205

Entities

People

  • Mark P. Parent
  • Rashmi Mital
  • William R. Pickles

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Antenna Arrays
  • Antennas
  • Arrays
  • Bandwidth
  • Couplings
  • Equations
  • Frequency
  • Frequency Bands
  • Insertion Loss
  • Linear Arrays
  • Losses
  • Military Research
  • Phase Shift
  • Phased Arrays
  • Radiation
  • Radiation Patterns
  • Simulations
  • Standards
  • Transmission Lines
  • Transmission Loss

Fields of Study

  • Engineering

Readers

  • Phased Array Antenna Design.
  • Systems Analysis and Design

Technology Areas

  • Microelectronics
  • Microelectronics - Microelectromechanical Systems