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Reduction of Propagation Losses in Coplanar Waveguide

MTT-S International Microwave Symposium Digest, 2005
Coplanar Waveguide (CPW) is finding increasing use in microwave and millimeter wave integrated circuits. CPW has several advantages over microstrip, but its ohmic loss tends to be larger because of the concentration of its currents near the metal edges. Two methods for reducing ohmic loss in CPW are proposed and studied using a numerical technique.
D.F. Williams, S.E. Schwarz
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Atmospheric models for over-ocean propagation loss

MILCOM 2015 - 2015 IEEE Military Communications Conference, 2015
Humidity over the ocean tends to be higher than over land, and long-range links at frequencies above 10 GHz may experience large propagation loss due to atmospheric absorption. When high link reliability is required, the log-normal assumption used to estimate power margins from the loss mean and standard deviation is not accurate.
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Propagation Losses Of Thin Film Waveguides

SPIE Proceedings, 1988
Propagation losses of ZnS thin film waveguides have been investigated. The effects of oxygen and water backpressures during the deposition of ZnS thin films on waveguide performance and microstructure have been observed. These effects dominated losses caused by surface finish. A decrease in losses, and a change in preferential crystal orientation from (
M. D. Himel, J. A. Ruffner, U. J. Gibson
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“Transmission loss” and “propagation loss” in undersea acoustics