Impact of Trees and Bushes on the Effective Height of a Vertical Electric ELF Antenna

Abstract

The impact is evaluated of nearby trees and bushes on the effective height of a vertical electric antenna in the extremely low frequency (ELF) band. We try to find the distance at which the plants might influence the local quasi-static field and thus disturb the effective height of antenna. The obtained results might be helpful when choosing the place of antenna positioning in the long-term ELF monitoring.