Input Impedance Calculation for TEM Horn Antennas

Abstract

A simple numerical technique is described for calculating the input impedance of ThM horn antennas for ultrawideband (UWB) applications. UWB antennas are required to radiate subnanosecond pulses with minimal distortion. The required bandwidth is from a few hundred megahertz up to 10 gigahertz. TEM horn antennas have emerged as potential candidates for directional UWB applications such as impulse radar. The input impedance of the horn is typically matched to the output impedance of the source. At the DSTO Wideband Test Facility, the antenna geometry has previously been varied empirically to produce the required input impedance due to the unreliability of alternative theoretical techniques based on conformal mapping which was not corrected until recently. This simple analysis circumvents this time consuming process and is readily implemented.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1995
Accession Number
ADB204758

Entities

People

  • Geoff Staines
  • Sean Braidwood

Organizations

  • Defence Science and Technology Group

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Antenna Radiation Patterns
  • Antennas
  • Australia
  • Conformal Mapping
  • Coordinate Systems
  • Department Of Defense
  • Electric Fields
  • Electronic Warfare
  • Electronics
  • Frequency
  • Geometry
  • Horn Antennas
  • Impedance
  • Test Facilities
  • Time-Domain Reflectometry
  • Two Dimensional
  • United States

Fields of Study

  • Physics

Readers

  • Pulsed Power and Plasma Physics.
  • Radar Systems Engineering.
  • Systems Analysis and Design