Title :
Open Microwave Resonators for Ionized Wake Measurement
Author :
Hayami, Richard A. ; Kelley, Kevin J.
Author_Institution :
GM Defense Research Laboratories, General Motors Corporation, Santa Barbara, Calif.
fDate :
3/1/1967 12:00:00 AM
Abstract :
A method is described for measuring changing ionization levels by observing the phase shift of a microwave signal which has passed through an open resonator while the resonator is being perturbed by the ionization. The measurement range is 109 to 1011 e/cm3 with a time resolution of 1 ¿s and a spatial resolution of 2.5 cm. Methods of measuring the phase shift and converting the phase information to useful results are detailed. Sources of error are also considered.
Keywords :
Density measurement; Electrons; Ionization; Microwave measurements; Phase measurement; Plasma density; Plasma measurements; Projectiles; Spatial resolution; Transient response; Electron density; hypersonic; ionization; microwave; perturbation; projectiles; resonator; wakes;
Journal_Title :
Aerospace and Electronic Systems, IEEE Transactions on
DOI :
10.1109/TAES.1967.5408760
