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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">nguphys</journal-id><journal-title-group><journal-title xml:lang="ru">Сибирский физический журнал</journal-title><trans-title-group xml:lang="en"><trans-title>SIBERIAN JOURNAL OF PHYSICS</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2541-9447</issn><publisher><publisher-name>Новосибирский государственный университет</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.25205/2541-9447-2025-20-3-23-33</article-id><article-id custom-type="elpub" pub-id-type="custom">nguphys-423</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>ФИЗИКА ВЫСОКИХ ЭНЕРГИЙ, УСКОРИТЕЛЕЙ И ВЫСОКОТЕМПЕРАТУРНОЙ ПЛАЗМЫ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>HIGH-ENERGY AND ACCELERATOR PHYSICS, PHYSICS OF HIGH-TEMPERATURE PLASMA</subject></subj-group></article-categories><title-group><article-title>Спектральная характеризация балансного смесителя для гетеродинной диагностики в окрестности частоты 0,3 ТГц</article-title><trans-title-group xml:lang="en"><trans-title>The Spectral Characterization of a Balanced Mixer for the Heterodyne Diagnostics in the Vicinity of the 0.3 THz</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>Самцов</surname><given-names>Д. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Samtsov</surname><given-names>D. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Денис Алексеевич Самцов, кандидат физико-математических наук, старший научный сотрудник</p><p>Новосибирск</p></bio><bio xml:lang="en"><p>Denis A. Samtsov, Doctor of Science (Physics and Mathematics), Senior Researcher</p><p>Novosibirsk</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сандалов</surname><given-names>Е. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Sandalover</surname><given-names>Ye. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Евгений Сергеевич Сандалов, кандидат физико-математических наук, старший научный сотрудник</p><p>Новосибирск</p></bio><bio xml:lang="en"><p>Yevgeny S. Sandalov, Doctor of Science (Physics and Mathematics), Senior Researcher</p><p>Novosibirsk</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Аржанников</surname><given-names>С. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Arzhannikov</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Андрей Васильевич Аржанников, доктор физико-математических наук, главный научный сотрудник</p><p>Новосибирск</p></bio><bio xml:lang="en"><p>Andrey V. Arzhannikov, Doctor of Science (Physics and Mathematics), Chief Researcher</p><p>Novosibirsk</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Калинин</surname><given-names>П. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kalinin</surname><given-names>P. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Петр Валерьевич Калинин, научный сотрудник</p><p>Новосибирск</p></bio><bio xml:lang="en"><p>Petr V. Kalinin, Researcher</p><p>Novosibirsk</p></bio><email xlink:type="simple">d.a.samtsov@inp.nsk.su</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт ядерной физики им. Г. И. Будкера СО РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Budker Institute of Nuclear Physics of SB RAS</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>11</day><month>05</month><year>2026</year></pub-date><volume>20</volume><issue>3</issue><fpage>23</fpage><lpage>33</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Самцов Д.А., Сандалов Е.С., Аржанников С.В., Калинин П.В., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Самцов Д.А., Сандалов Е.С., Аржанников С.В., Калинин П.В.</copyright-holder><copyright-holder xml:lang="en">Samtsov D.A., Sandalover Y.S., Arzhannikov A.V., Kalinin P.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://nguphys.elpub.ru/jour/article/view/423">https://nguphys.elpub.ru/jour/article/view/423</self-uri><abstract><p>В Институте ядерной физики им. Г. И. Будкера проводятся исследования по генерации мультимегаватных потоков излучения в интервале частот 0,1–1 ТГц. В настоящее время, исходя из перспективы практического использования таких потоков излучения, данные работы сосредоточиваются на локальной частотной области 0,3 ТГц. Для детального исследования потока излучения с высоким спектральным разрешением в этой локальной области частот нами создается радиометрическая диагностика на основе гетеродинного метода регистрации сигнала с высоким временным разрешением. Ключевой составляющей такой частотно-селективной диагностики высокого разрешения служит балансный смеситель, который обеспечивает получение сигнала на частоте, равной разности частот исследуемого и опорного сигналов. В представляемой работе описаны результаты характеризации балансного смесителя, который поставляется компанией МВэйв для использования потребителями в интервале частот 0,2–0,3 ТГц. Спектральные измерения проведены в окрестности частоты 0,3 ТГц в условиях, когда исследуемый сигнал и опорный сигнал поступают на входы смесителя в виде потоков излучения по квазиоптическим трактам. Частота исследуемого сигнала, подаваемого от лампы обратной волны, варьировалась в пределах от 288 до 294 ГГц. Опорный сигнал на эталонной частоте 290,85 ГГц генерировался диодом Ганна. В проведенных измерениях доказан линейный характер зависимости частоты разностного сигнала от разницы частот сигналов, подаваемых на входы смесителя, в пределах изменения отстройки от +4 до –2 ГГц. Разрешающая способность по частоте гетеродина с данным балансным смесителем оказалась на уровне не хуже 0,1 %.</p></abstract><trans-abstract xml:lang="en"><p>The Budker Institute of Nuclear Physics is conducting research on the generation of multi-megawatt radiation ﬂuxes in the frequency range of 0.1–1 THz. Currently, based on the prospects for practical use of such radiation ﬂuxes, this work is focused on a local region of 0.3 THz, which corresponds to a wavelength of 1 mm. To study the radiation ﬂux in this local frequency range in detail with high spectral resolution, we are developing a radiometric diagnostic system based on a heterodyne method for signal recording with high temporal resolution. One of the key components of this frequency-selective diagnostic system is a balanced mixer, which must generate a signal at a frequency equal to the diﬀerence between the frequency of the signal being studied and the reference frequency of the reference signal. This paper describes the characterization results of a balanced mixer supplied by MWave for use in the frequency range of 0.2–0.3 THz. Measurements were conducted around 0.3 THz with the working and reference signals supplied as radiation beams through quasi-optical paths. The working signal frequency varied from 288 to 294 GHz. The reference signal at a reference frequency of 290.85 GHz was provided by a Gunn diode. The measurements demonstrated the linearity of the diﬀerence signal frequency dependence on the frequency diﬀerence between the signals supplied to its two inputs. The frequency resolution of the local oscillator with this balanced mixer was found to be no worse than 0.1%.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>терагерцевое излучение</kwd><kwd>радиометрическая диагностика</kwd><kwd>гетеродинирование</kwd><kwd>квазиоптическое приборостроение</kwd></kwd-group><kwd-group xml:lang="en"><kwd>terahertz radiation</kwd><kwd>radiometric diagnostics</kwd><kwd>heterodyning</kwd><kwd>quasi-optical instrumentation</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Часть исследования, посвященная созданию гетеродинной системы регистрации излучения в окрестности частоты 300 ГГц выполнена за счет гранта Российского научного фонда (проект №25-22-00317). Авторы выражают признательность сотрудникам Центра коллективного пользования научным оборудованием «Высокие технологии и аналитика наносистем» НГУ за предоставленное измерительное оборудование.</funding-statement><funding-statement xml:lang="en">The work was supported by the Russian Science Foundation (project 25-22-00317). The authors acknowledge the Shared Equipment Center CKP “VTAN” (ATRC) of the NSU Physics Department for instrumental support of THz measurements.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Dhillon S. S., Vitiello M. S., Linﬁeld E. H. et al. The 2017 terahertz science and technology roadmap // Journal of Physics D: Applied Physics. 2017. Vol. 50. No. 4. P. 043001. DOI 10.1088/1361-6463/50/4/043001</mixed-citation><mixed-citation xml:lang="en">Dhillon S. S., Vitiello M. S., Linﬁeld E. H. et al. 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