Date of Award
Fall 1989
Document Type
Thesis - Restricted
Degree Name
Master of Science (MS)
First Advisor
Ishii, Thomas K.
Second Advisor
Jeutter, Dean C.
Third Advisor
Richie, James
Abstract
The propagation velocity of non-TEM waves in rectangular waveguide and free space are investigated. The phase and group velocities of non-TEM waves in rectangular waveguide are a function of frequency. It was experimentally observed that the measured signal velocity, though larger than the theoretical group velocity, decreased as the frequency was decreased. Thus, it followed the theoretical group velocity curve. It was also observed that the signal velocity was dependant [sic] upon the sensitivity of the detector. Therefore, the use of a more sensitive detector in the experiments should yield a larger signal velocity. The limit of the signal velocity, or the wavefront velocity could not be determined due to the lack of a more sensitive detector. The phase and group velocities of non-TEM waves in free space are a function of the angle of observation. It was experimentally observed that the signal velocity was much slower than the peak velocity. This was due to attenuation and energy spreading of the pulse, thus causing the wavefront to be below the minimum detectable level of the detector. Unfortunately, no obvious trend existed in either the signal velocity or peak velocity data. However, the statistical trend of both measured parameters increased as the angle of observation increased. This corresponds to the theoretical phase velocity curve.
Recommended Citation
Bohn, Thomas B., "Propagation Velocity of Non-Tem Waves" (1989). Master's Theses (1922-2009) Access restricted to Marquette Campus. 3971.
https://epublications.marquette.edu/theses/3971