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<article article-type="research-article" dtd-version="1.3" 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" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">radioelectronics</journal-id><journal-title-group><journal-title xml:lang="ru">Известия высших учебных заведений России. Радиоэлектроника</journal-title><trans-title-group xml:lang="en"><trans-title>Journal of the Russian Universities. Radioelectronics</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1993-8985</issn><issn pub-type="epub">2658-4794</issn><publisher><publisher-name>Saint Petersburg Electrotechnical University</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">radioelectronics-44</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ПРОЕКТИРОВАНИЕ И ТЕХНОЛОГИЯ РАДИОЭЛЕКТРОННЫХ СРЕДСТВ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ENGINEERING DESIGN AND TECHNOLOGIES OF RADIO ELECTRONIC FACILITIES</subject></subj-group></article-categories><title-group><article-title>Перестраиваемые полосно-пропускающие фильтры с постоянной шириной полосы пропускания на элементах с сосредоточенными параметрами</article-title><trans-title-group xml:lang="en"><trans-title>Tunable lumped-element bandpass filters with constant bandwidth</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Баскакова</surname><given-names>А. Э.</given-names></name><name name-style="western" xml:lang="en"><surname>Baskakova</surname><given-names>A. E.</given-names></name></name-alternatives><email xlink:type="simple">baskakovaleksandra@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Тургалиев</surname><given-names>В. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Turgaliev</surname><given-names>V. M.</given-names></name></name-alternatives><email xlink:type="simple">V.Turgaliev@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Холодняк</surname><given-names>Д. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kholodnyak</surname><given-names>D. V.</given-names></name></name-alternatives><email xlink:type="simple">Dmitry.Kholodnyak@mwlab.spb.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Санкт-Петербургский государственный электротехнический университет "ЛЭТИ" им. В. И. Ульянова (Ленина)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Saint-Petersburg state electrotechnical university "LETI"</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2015</year></pub-date><pub-date pub-type="epub"><day>28</day><month>08</month><year>2015</year></pub-date><volume>0</volume><issue>4</issue><fpage>36</fpage><lpage>43</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Баскакова А.Э., Тургалиев В.М., Холодняк Д.В., 2015</copyright-statement><copyright-year>2015</copyright-year><copyright-holder xml:lang="ru">Баскакова А.Э., Тургалиев В.М., Холодняк Д.В.</copyright-holder><copyright-holder xml:lang="en">Baskakova A.E., Turgaliev V.M., Kholodnyak D.V.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://re.eltech.ru/jour/article/view/44">https://re.eltech.ru/jour/article/view/44</self-uri><abstract><p>Рассмотрены перестраиваемые полосно-пропускающие фильтры (ППФ) на элементах с сосредоточенными параметрами, состоящие из LC-контуров и инверторов сопротивления или проводимости. Перестройка центральной частоты обеспечивается переменными конденсаторами, входящими в контуры и инверторы. Проанализирован диапазон перестройки ППФ с сохранением постоянной ширины полосы пропускания. Приведены условия сохранения абсолютной и относительной ширины полосы пропускания. Обсуждены ограничения на диапазон перестройки ППФ, связанные с практической реализацией инверторов сопротивления/проводимости и с использованием реальных управляющих элементов (переменных конденсаторов). Представлены результаты проектирования перестраиваемого ППФ третьего порядка с постоянной абсолютной шириной полосы пропускания. </p></abstract><trans-abstract xml:lang="en"><p>Lumped-element bandpass filters using LC-tanks and immittance inverters are considered. Tuning of the central frequency is provided by using variable capacitors of LC-tanks and immittance inverters. Tunability of constant-bandwidth bandpass filters is analyzed. Conditions to keep absolute and fractional bandwidth constant are presented. Tunability limitations due to to practical implementation of the immittance inverters and using of real controlling com.ponents (variable capacitors) are discussed. Design of a 3-pole tunable bandpass filter with constant absolute bandwidth is presented. </p></trans-abstract><kwd-group xml:lang="ru"><kwd>Полосно-пропускающие фильтры</kwd><kwd>элементы с сосредоточенными параметрами</kwd><kwd>перестройка</kwd><kwd>постоянная ширина полосы пропускания</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Bandpass filters</kwd><kwd>lumped elements</kwd><kwd>tunability</kwd><kwd>constant bandwidth</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Hunter I. C., Rhodes J. D. Electronically tunable microwave bandpass filters // IEEE Trans. microwave theory tech. 1982. Vol. MTT-30, № 9. 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