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<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Journal of Communications Technology and Electronics</journal-id><journal-title-group><journal-title xml:lang="en">Journal of Communications Technology and Electronics</journal-title><trans-title-group xml:lang="ru"><trans-title>Радиотехника и электроника</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0033-8494</issn><issn publication-format="electronic">3034-5901</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">650697</article-id><article-id pub-id-type="doi">10.31857/S0033849424030024</article-id><article-id pub-id-type="edn">JVOATR</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>АНТЕННО-ФИДЕРНЫЕ&#13;
СИСТЕМЫ</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>АНТЕННО-ФИДЕРНЫЕСИСТЕМЫ</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Bifocal system of two reflect arrays</article-title><trans-title-group xml:lang="ru"><trans-title>Бифокальная система двух отражательных решеток</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kaloshin</surname><given-names>V. A.</given-names></name><name xml:lang="ru"><surname>Калошин</surname><given-names>В. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>vak@cplire.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Tuan</surname><given-names>Trinh Van</given-names></name><name xml:lang="ru"><surname>Туан</surname><given-names>Чинь Ван</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>vak@cplire.ru</email><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Kotelnikov Institute of Radioengineering and Electronics RAS</institution></aff><aff><institution xml:lang="ru">Институт радиотехники и электроники им. В. А. Котельникова РАН</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Moscow Institute of Physics and Technology (National Research University)</institution></aff><aff><institution xml:lang="ru">Московский физико-технический институт (НИУ)</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2024-03-14" publication-format="electronic"><day>14</day><month>03</month><year>2024</year></pub-date><volume>69</volume><issue>3</issue><fpage>217</fpage><lpage>226</lpage><history><date date-type="received" iso-8601-date="2025-01-31"><day>31</day><month>01</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, Russian Academy of Sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2024, Российская академия наук</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="en">Russian Academy of Sciences</copyright-holder><copyright-holder xml:lang="ru">Российская академия наук</copyright-holder></permissions><self-uri xlink:href="https://innoscience.ru/0033-8494/article/view/650697">https://innoscience.ru/0033-8494/article/view/650697</self-uri><abstract xml:lang="en"><p>A technique has been developed for accurately solving the problem of geometric-optical synthesis of a bifocal system of two flat reflect arrays, based on the sequential determination of the distribution of the eikonal introduced by different sections of the arrays, with its assignment at the initial section of one of the arrays, while the introduced eikonal at the initial section of the other array is found as a result of synthesis of the output flat front for the central position of the feed. The technique ensures the continuity of functions describing the distributions of introduced eikonals, as well as their first and second derivatives (along one coordinate) at the boundaries of sections. The dependence of the value of the mean square eikonal aberration at the system output on the arrays parameters has been studied. As an example of the application of the developed technique, the bifocal systems for visual angles of 40° and 65° were synthesized and optimized. A study of the radiation characteristics of an antenna based on synthesized and optimized bifocal systems was carried out.</p></abstract><trans-abstract xml:lang="ru"><p>Развита методика точного решения задачи геометрооптического синтеза бифокальной системы двух плоских отражательных решеток, основанная на последовательном нахождении распределения эйконала, внесенного различными участками решеток, с его заданием на начальном участке одной из решеток, при этом внесенный эйконал на начальном участке другой решетки находится в результате синтеза выходного плоского фронта для центрального положения луча. Методика обеспечивает непрерывность функций, описывающих распределения внесенных эйконалов, а также их первой и второй производной (по одной координате) на границах участков. Исследована зависимость величины среднеквадратической аберрации эйконала на выходе системы от параметров решеток. В качестве примера применения развитой методики синтезированы и оптимизированы бифокальные системы для угла зрения 40° и 65°. Проведено исследование характеристик излучения антенны на основе синтезированных и оптимизированных бифокальных систем.</p></trans-abstract><kwd-group xml:lang="en"><kwd>bifocal systems</kwd><kwd>reflect arrays</kwd><kwd>synthesis</kwd><kwd>optimization</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>бифокальные системы</kwd><kwd>отражательные решетки</kwd><kwd>синтез</kwd><kwd>оптимизация</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Правительство РФ</institution></institution-wrap><institution-wrap><institution xml:lang="en">Government of the Russian Federation</institution></institution-wrap></funding-source></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Leberer R., Menzel W. // IEEE Trans. 2005. AP-53. № 11. 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