Date of Award


Document Type


Degree Name

Master of Science


Department of Electrical and Computer Engineering

First Advisor

Michael J. Havrilla, PhD


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.

AFIT Designator


DTIC Accession Number