Microwave level gauging system
Date
1994
Authors
Guo, Wei
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Abstract
Two types of surface waveguides, the Goubau line and the dielectric rod, are considered as the transmission media for a microwave level gauging system for measurement of the liquid levels. Surface waveguides are capable of becoming some limitations of the transmission media in the present systems. They are free from the parasitic reflections from surrounding objects, which is the main problem in the system utilizing free space propagation, and are resistant to the deposits which may degrade the performance of systems with metallic waveguides. An experimental arrangement is developed and the operation of the system is verified by the measurements of the actual levels of water and oil. Both theoretical studies and experimental results show that the surface waveguides maybe suitable as the transmission media for a microwave level gauging system.