EFFICIENT FLUSHMOUNTED SURFACE WAVE LAUNCHER

Abstract

Various methods for launching surface waves are reviewed, and the basic design principles are outlined for different kinds of launchers. The case of a slot in a dielectric-clad groundplane is analyzed in detail, and experiments supporting the calculated results are reported. A way of combining several slots for good launching efficiency is derived and a five-slot launcher designed after this principle is described. Results from measurements of radiation patterns and efficiency are reported; as well as from measurements of radiation patterns from discontinuities on a surface waveguide excited by this launcher in combination with a cylindrical parabolic reflector. In particular, a launching efficiency of over 80% was achieved with five slots, as compared to about 48% with one slot. Radiation patterns due to abrupt changes in dielectric thickness were measured, and compared with theoretical results for a corresponding change in surface reactance. The agreement was good at least within the main lobe.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1962
Accession Number
AD0406632

Entities

People

  • Mats E. Viggh

Tags

Communities of Interest

  • Air Platforms
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aircrafts
  • Amplitude
  • Boundaries
  • Boundary Value Problems
  • Complex Variables
  • Coordinate Systems
  • Electrical Engineering
  • Engineering
  • Measurement
  • New Jersey
  • New York
  • Physics
  • Plane Waves
  • Radiation
  • Radiation Patterns
  • Square Waves
  • Transmission Lines

Fields of Study

  • Physics

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Marksmanship and Weaponry.