• Українська
  • English
  • Русский
ISSN 2415-3400 (Online)
ISSN 1028-821X (Print)

ON THE “TREE” VERTICAL ELECTRIC ELF ANTENNA

heading: 
MICROWAVE ELECTRODYNAMICS
Velichko, EA, Nickolaenko, AP
Organization: 

O. Ya. Usikov Institute for Radiophysics and Electronics of the National Academy of Sciences of Ukraine
12, Proskura st., Kharkov, 61085, Ukraine
E-mail: sasha@ire.kharkov.ua
https://doi.org/10.15407/rej2016.04.003
Language: Russian
Abstract: 

Development of new antennas for reception of radio signals was and remains an actual problem. We model and estimate the efficiency of unusual design of the vertical electric antenna detecting ELF (3…3 000 Hz) radio signals. The antenna must be sensitive to the vertical electric field of radio waves traveling in the spherical Earth–ionosphere cavity at frequencies of global electromagnetic (Schumann) resonance ranging from 4 to 40 Hz. It is formed by a couple of electrodes fixed at the tree trunk at different heights separated by several meters. Such a design is unusual, and its workability might seem dubious. We show with the help of model computations that the tree antenna is a rather effective ELF sensor, especially in fair weather condition. We also discuss the requirements for the tree antenna pre-amplifier. 
Keywords: antenna amplifier, global electromagnetic resonance, tree antenna, vertical electric antenna

Manuscript submitted 20.07.2016
PACS     93.85.Jk
Radiofiz. elektron. 2016, 21(4): 3-10
Full text (PDF) 

References: 
  1. Nickolaenko, A. and Hayakawa M., (2014), Schumann Resonance for Tyros; Springer Geophysics. Ser. XI., Tokyo, Japan: Springer Japan. DOI: https://doi.org/10.1007/978-4-431-54358-9
  2. Fraser-Smith, A.C., (1978), ULF tree potentials and geomagnetic pulsations, Nature. 271(5646):641–642. DOI: https://doi.org/10.1038/271641a0
  3. Velichko, E.A. and Nickolaenko, A.P., (2011), Modeling of plane electromagnetic wave scattering by dielectric cylinder, Telecommunications and Radio Engineering, 70(18):1617-1627. DOI: https://doi.org/10.1615/TelecomRadEng.v70.i18.20
  4. Velichko, E.A. and Nickolaenko, A.P., (2014), Scattering of a plane electromagnetic wave by a metal cylinder with dielectric or metamaterial coating, Radiophysics and Quantum Electronics. 57(1):43–51. DOI: https://doi.org/10.1007/s11141-014-9492-y
  5. Wait, J.R., (1986), Introduction to Antennas and Propagation, London, UK: Peter Peregrinus Ltd.
  6. Nickolaenko, A.P. and Hayakawa, M., (2002), Resonances in the Earth-Ionosphere Cavity, Dordrecht, The Netherlands: Kluwer Academic Publishers/Springer Netherlands.
  7. Yatsevich, E.I. and Nickolaenko, A.P., (2012), Evaluation of the impact of vegetation on the effective height of the vertical electric ELF antenna, Telecommunications and Radio Engineering, 71(11):997-1003. DOI: https://doi.org/10.1615/TelecomRadEng.v71.i11.40
  8. Yatsevich, E.I. and Nickolaenko, A.P., (2012), Impact of trees and bushes on the effective height of a vertical electric ELF antenna, J. Atmospheric Electricity. 32(2):65–70. DOI: https://doi.org/10.1541/jae.32.65