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Due to its advantages, over the past decade there has been a rapid development of active phased array towards higher and higher frequencies – from L band to X and Ku bands. However, when switching to higher frequency ranges, the problems of active phased array construction begin to worsen, due to the decrease in wavelength and the necessary reduction in the size of the receiving and transmitting modules. First of all, this is due to the construction of the active phased array radiating system, the low efficiency of the power amplifiers of the transmitting part and the problem of ensuring the thermal regime of the active phased array. The purpose of the work is to evaluate possible options for constructing a radiating active phased array system in the Ka range. To assess the applicability of non-equidistant antenna arrays in the active phased array range emitting systems, the characteristics of antenna arrays with uneven spacing of the radiators were modeled. The advantages of the non-equidistant active phased array aperture are an increase in the location of the modules and for the installation of heat-dissipating buses, the possibility of increasing the size of the modules and the location of emitters of various polarizations, and the implementation of full polarization reception. A comparative analysis of the active phased array output power with longitudinal integration and transverse assembly and transverse integration with longitudinal assembly depending on cooling conditions has been carried out. The results obtained show that, despite the smaller number of emitters, it is possible to achieve higher microwave radiation power of non-equidistant active phased array by improving the cooling conditions of the modules in a sparse antenna array.

Key words: active phased array, AFAR, radiating system, unequal antenna array, transceiver modul
Published in: CIRCUIT ENGINEERING AND DESIGN
Bibliography link: Minakov E. I., Makaretsky E. A., Lagutin S. A., Pereverzev A .L., Lyalin K. S. Analysis of active phased array radiating systems of the Ka band. Izv. vuzov. Elektronika = Proc. Univ. Electronics. 2025;30(6):731–740. (In Russ.). https://doi.org/10.24151/1561-5405-2025-30-6-731-740.
Financial source: the work was carried out with the financial support of the Committee on Science and Innovation of the Tula Region (grant in the form of a research grant from No. 15 dated June 21, 2024).

Evgeniy I. Minakov
Tula State University, Russia, 300012, Tula, Lenin ave., 92

Evgeniy A. Makaretskiy
Tula State University, Russia, 300012, Tula, Lenin ave., 92

Sergey A. Lagutin
Tula State University, Russia, 300012, Tula, Lenin ave., 92

Alexey L. Pereverzev
National Research University of Electronic Technology (Russia, 124498, Moscow, Zelenograd, Shokin sq., 1)

Konstantin S. Lyalin
National Research University of Electronic Technology (Russia, 124498, Moscow, Zelenograd, Shokin sq., 1)

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Information about the publication

UDK: 621.396.677.3
Publication type: Scientific article
Source lang: Russian
DOI: 10.24151/1561-5405-2025-30-6-731-740
RISC id: IGAPCY

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