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Telecommunications and Radio Engineering
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ISSN Print: 0040-2508
ISSN Online: 1943-6009

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Telecommunications and Radio Engineering

DOI: 10.1615/TelecomRadEng.v57.i4.60
7 pages

Coupling Impedances and Radiation Efficiencies of Horizontal Electric Dipoles Placed Above the Earth Surface

P. L. Tokarsky
Institute of Radio Astronomy, National Academy of Sciences of Ukraine 4, Krasnoznamennaya St., Kharkiv 61002, Ukraine

ABSTRACT

The radiation from coupled horizontal Hertz electrical dipoles placed near a plane interface of two media is analyzed. Expressions have been derived for the coupling impedance, coupling radiation resistance and loss resistance of the dipoles above the real earth. Relations are also given for estimating the radiation efficiency of an antenna array composed of such dipoles with arbitrary current distributions in the array. The coupling resistances of horizontal dipoles are analyzed as functions of the dipole separation, and the radiation efficiency of the array discussed in dependence on the phasing angle. Numerical results are discussed.


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