R. E. Kosak1, A. V. Gevorkyan2
1, 2 Institute of Radio Engineering Systems and Control, Southern Federal University (Taganrog, Russia)

1 kosak@sfedu.ru, 2 avgevorkyan@sfedu.ru

Currently, a lot of phased array radiators based on the Vivaldi antenna are known. Some of them operate in a wide band or an ultra-wide band (UWB), but only a few can operate in UWB with wide-angle scanning capability. However, such radiators often have a relative dimension greater than the wavelength at the upper operating frequency, which complicates transportation, increases material consumption and leads to an increase in the cost of the phased array manufacturing process.

The objective of the article is to develop two electrodynamic designs of phased array radiators with matching inserts of different sizes and to study their characteristics both as part of infinite phased arrays and as part of antenna arrays with small element-counts.

Electrodynamic models of compact wide-angle scanning UWB cardioid radiators with matching inserts of varying sizes have been developed. Their characteristics have been studied as part of infinite phased arrays and antenna arrays with small element-counts on screens of varying sizes. An analysis of the obtained characteristics has been conducted. It has been determined that for the electrodynamic modeling of antenna arrays with small element-counts, it is recommended to use a cardioid radiator modification with 54 inserts in the aperture, and for radiators as part of infinite phased arrays, a modification with 22 inserts in the aperture is recommended.

The proposed modified designs of cardioid radiators with matching inserts can be used in radar, radio navigation, or radio communication systems.

Kosak R.E., Gevorkyan A.V. Influence of matching elements on the characteristics of cardioid radiators. Antennas. 2025. № 6. P. 57–71. DOI: https://doi.org/10.18127/j03209601-202506-07 (in Russian)

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