UHF (Ultra-High-Frequency) Propagation in Vegetative Media

摘要

The status of experimental and theoretical work dealing with UHF propagation in vegetative media has been investigated. The area of particular interest is work that is applicable to spread-spectrum communication. A literature search revealed that a number of experimental investigations of UHF propagation in vegetative media have been conducted, but that there have been very few wideband experiments that are relevant for spread-spectrum communications. A vast literature exists on the theory of wave propagation in random media in general, but specific application to UHF electromagnetic wave propagation in forests appears to be lacking. An outline of the application of propagation-mechanism theory is included together with a brief discussion of the characterization of a vegetative medium. (Author)