S. V. Dudarev1
1 South Ural State University (national research university) (Chelyabinsk, Russia)

1 dudarevsv@susu.ru

Recently, various wireless data transmission systems have been rapidly developing, which is associated with the emergence of a new generation of cellular communications, the improvement of various mobile objects, etc. The expansion of the range of tasks that require wireless data transmission has led to a significant increase in the frequency ranges used. In this regard, each new task requires the development of its own radiating device, which significantly increases the development time and cost of the product. Therefore, recently there has been an increasing interest in antennas operating in several frequency bands at the same time. Thus, an urgent problem at present is development of antennas capable of operating in two or more frequency ranges. Solving this problem will expand the applicability of antennas for modern tasks.

The aim of the article is to develop and investigate a planar structure to improve the matching of a dual-band omnidirectional printed antenna with a feeder in operating ranges with widths of at least 45 and 15%.

A multilayer printed antenna consisting of three vertically arranged boards has been developed. The first and second boards together represent a dual-band non-directional antenna with horizontal polarization. The third board contains four sets of planar elements, each of which consists of five ring-shaped open resonators of various sizes. According to the calculation results, the proposed antenna operates in the ranges 1671–2678 and 4360–5192 MHz (VSWR = 2). The use of the third layer with various planar ring resonators made it possible to reduce the VSWR value at the maxima in the operating frequency ranges: in the first range by 20%, and in the second – by 36%.

The width of the operating frequency ranges of 46.3 and 17.4% allows the proposed antenna to be used as an independent receiving and transmitting antenna or an element of a non-directional antenna array for wireless data transmission, for example, for cellular communications in the bands 1710–2690 MHz (2–4G, LTE) and 4400–5000 MHz (n79 5G).

Dudarev S.V. Dual-band omnidirectional multilayer antenna // Antennas. 2026. № 4. P. 29–41. DOI: https://doi.org/10.18127/ j03209601-202604-04

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