Investigation of Frequency-Domain and Time-Domain Free-Space Material Measurements

Abstract

Electromagnetic material characterization is the process of determining the complex permittivity and permeability of a test sample. The primary goal of this thesis is to develop a new two-transmission material measurement method to decrease the error associated with using a reflection measurement. The transmission method uses a sample transmission measurement and an acrylic-backed sample transmission measurement. This technique is first demonstrated in a rectangular waveguide system then extended to frequency-domain and time-domain focus arch free-space systems. The frequency-domain free-space calibration process decreases accuracy at the band edges. The use of a digital oscilloscope with a time-domain reflectometer (TDR) module should increase accuracy by removing the windowing and transforming operations and is a secondary goal of this thesis. The two transmission method is compared to the NRW method to validate the two transmission method in all three measuring devices.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Mar 01, 2006
Accession Number
ADA453927

Entities

People

  • Kirt J. Cassell

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Advanced Electronics
  • C4I
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Air Force
  • Calibration
  • Dielectric Permittivity
  • Electrical Engineering
  • Errors
  • Frequency
  • Frequency Bands
  • Frequency Domain
  • Materials
  • Measurement
  • Power Amplifiers
  • Radar Absorbing Materials
  • Space Systems
  • Time Domain
  • Time Domain Reflectometer
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Geodesy
  • Phased Array Antenna Design.

Technology Areas

  • Space