Some Theoretical Considerations in the Design of Directional-Null-Type Antennas

Abstract

The essential characteristics of directional-null-type antenna patterns as produced by the superposition of two primary antenna patterns phased 180 degrees apart are derived mathematically for the purpose of determining the design parameters and estimating the effect of their variation. Both omni-directional (in one plane) and directional types of primary antenna elements are considered. Equations are derived for the rate of change of field strength with azimuth angle near the central null and for the angular position of the first maximum. The effects of squinting the beams by introducing and angular displacement between the directions of maximum gain are considered as well as the effects of mutual impedance and inequalities of current amplitude, phase, and primary antenna patterns.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1947
Accession Number
AD1204348

Entities

People

  • Colin Parker

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Amplitude
  • Direction Finding
  • Directional
  • Displacement
  • Equations
  • Impedance
  • Inequalities
  • Mathematics
  • Position Finding

Fields of Study

  • Physics

Readers

  • Adaptive Control and Estimation with Uncertainty in Dynamic Systems.
  • Phased Array Antenna Design.
  • Plasma Physics / Magnetohydrodynamics