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Earth impedance model for through‐the‐earth communication applications with electrodes
Author(s) -
Bataller Vanessa,
Muñoz Antonio,
Gaudó Pilar Molina,
Mediano Arturo,
Cuchí José A.,
Villarroel José L.
Publication year - 2010
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/2010rs004406
Subject(s) - electrical impedance , antenna (radio) , earth (classical element) , acoustics , ground , electrode , wireless , input impedance , computer science , focused impedance measurement , geology , electrical engineering , electronic engineering , remote sensing , telecommunications , engineering , physics , quantum mechanics , mathematical physics
Through‐the‐earth (TTE) communications are relevant in applications such as caving, tunnel and cave rescue, mining, and subsurface radiolocation. The majority of the TTE communication systems use ground electrodes as load antenna. Wires, electrode contact, and earth impedances are the major contributors to the impedance observed by the transmitter. In this paper, state‐of‐art models found in the literature are reviewed, and an improved method to measure the earth impedance is presented. The paper also proposes an optimal circuit model for earth impedance between electrodes as a function of frequency, as a consequence of the particular conditions of the application. The model is validated with measurements for different soil conditions, showing a good agreement between empirical data and the simulation results.