Journal of Radio Electronics. eISSN 1684-1719. 2026. №7

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DOI: https://doi.org/10.30898/1684-1719.2026.7.3

INVESTIGATION OF THE CHARACTERISTICS
OF A DUAL-BAND OmniDIRECTIONAL ANTENNA
WITH A HIGH-IMPEDANCE SURFACE

S.V. Dudarev

South Ural State University,
454080, Russia, Chelyabinsk, Lenin Avenue, 76

The paper was received May 29, 2026.

Abstract. The active development of small-sized mobile objects and mobile radio engineering systems has recently highlighted the problem of creating compact broadband and multi-band omnidirectional antennas. The article proposes a new compact dual-band omnidirectional antenna with horizontal polarization, which is a multilayer structure of three printed circuit boards. To reduce the size of the antenna, a high-impedance surface or EBG (Electomagnetic Band Gap) is used instead of a solid screen in its design structure. As a result of electrodynamic modeling, the main characteristics of the proposed antenna are calculated. The article also presents the results of a study of the influence of the main geometric parameters of a high-impedance surface on the VSWR, gain, and antenna radiation pattern. It was found that the use of a high-impedance surface instead of a screen made it possible to reduce the distance between the shielding surface and the board with radiating elements by 18% without deterioration of the VSWR. As a result of calculations, it was determined that the antenna operates in two frequency ranges, the relative width of which, according to the VSWR level of 2, is 45.4 and 17.8%. This allows the antenna to be used for various tasks, for example, to provide wireless data transmission and mobile communications in the 2-5G bands.

Key words: omnidirectional antenna, multilayer antenna, dual-band antenna, horizontal polarization, antenna size reduction, high-impedance surface, EBG structure, mushroom element.

Financing: Viktor Khristenko's grant program "Step into the Future" (donation agreement No. 240425 dated 04/25/2024).

Corresponding author: Dudarev Svyatoslav Valerievich, dudarev.svyatoslav@yandex.ru

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For citation:

Dudarev S.V. Investigation of the characteristics of a dual-band omnidirectional antenna with a high-impedance surface. // Journal of Radio Electronics. – 2026. – №. 7. https://doi.org/10.30898/1684-1719.2026.7.3 (In Russian)