Journal of Radio Electronics. eISSN 1684-1719. 2026. №2
Full text in Russian (pdf)
DOI: https://doi.org/10.30898/1684-1719.2026.2.2
ON THE CALCULATION OF THE RADIATION PATTERN
OF AN ELEMENTARY LOOP ANTENNA
LOCATED IN THE EARTH'S IONOSPHERE
A.V. Moshkov
Kotelnikov IRE RAS
125009, Russia, Moscow, Mokhovaya str., 11, b.7
The paper was received December 16, 2026.
Abstract. A low-frequency loop antenna located in the ionosphere can be used as an effective tool for plasma diagnostics and radio communications. The problem of finding the far field of an antenna is a magnetoplasma such as the ionosphere was solved by several workers earlier. It was shown that the results may be reformulated in a simpler manner to express them in terms of the normalized characteristic plane waves of the medium. This has the advantage of showing clearly how the far field depends on the free space pattern of the antenna, on the shape of the dispersion surface, namely, on the curvature characteristics of this surface. The purpose of this work is to explicitly express in general terms the dependence of the radiation pattern of the elementary loop antenna on the Gaussian radius of curvature of the dispersion surface. Cold plasma approximation is used without explicit limitations on wave frequency and direction. For this purpose, coefficients of the first and the second fundamental forms at any point of dispersion surface are calculated. As an illustration, the results of calculating the radiation pattern of the loop antenna in the frequency interval 1...100 kHz are given. A corresponding computational algorithm is formulated.
Key words: ionosphere, loop antenna, radiation pattern, dispersion surface, Gaussian radius of curvature.
Financing: the work was carried out on the topic of the state assignment of the Kotelnikov IRE RAS No. FFWZ-2022-0014.
Corresponding author: Moshkov Aleksandr Vladimirovich, kuzaf@inbox.ru
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For citation:
Moshkov A.V. On the calculation of the radiation pattern of an elementary loop antenna located in the Earth's ionosphere // Journal of Radio Electronics. – 2026. – №. 2. https://doi.org/10.30898/1684-1719.2026.2.2 (In Russian)