Infocommunications and Radio Technologies Infocommunications and Radio Technologies ИНФОКОММУНИКАЦИОННЫЕ И РАДИОЭЛЕКТРОННЫЕ ТЕХНОЛОГИИ 2587-9936 53543 10.29039/2587-9936.2022.05.4.38 Электроника, фотоника, приборостроение и связь (2.2) ELECTRONICS, PHOTONICS, INSTRUMENTATION AND COMMUNICATIONS (2.2) Электроника, фотоника, приборостроение и связь (2.2) Prospects of Microminiaturization of Multichannel Multi-Frequency Radiothermographs Перспективы микроминиатюризации многоканальных многочастотных радиотермографов Гудков Александр Григорьевич Gudkov Alexander Grigor'evich profgudkov@gmail.com

доктор технических наук;

doctor of technical sciences;

 https://orcid.org/0000-0003-4353-8962 Веснин Сергей Георгиевич Vesnin Sergey G.

кандидат технических наук;

candidate of technical sciences;

 Соловьев Юрий Владимирович Solov'ev Yuriy V. Тихомиров Владимир Геннадьевич Tikhomirov Vladimir G. Попов Владимир Васильевич Popov Vladimir V.

кандидат технических наук;

candidate of technical sciences;

 МГТУ им. Н. Э. Баумана Москва Россия Bauman Moscow State Technical University Moscow Russian Federation МГТУ им. Н. Э. Баумана Москва Россия Bauman Moscow State Technical University Moscow Russian Federation Российский университет дружбы народов Москва Россия RUDN University Moscow Russian Federation ООО «РТМ Диагностика» Москва Россия RTM Diagnostic, LLC Moscow Russian Federation АО «Светлана-Электронприбор» Санкт-Петербург Россия Svetlana-Electronpribor, JSC Saint Petersburg Russian Federation Санкт-Петербургский государственный электротехнический университет «ЛЭТИ» им. В.И. Ульянова (Ленина) Санкт-Петербург Россия Saint Petersburg State Electrotechnical University «LETI» Saint Petersburg Russian Federation ПАО «Светлана» Санкт-Петербург Россия Svetlana, PJSC Saint Petersburg Russian Federation 21 10 2022 21 10 2022 5 4 531 547 20 05 2022 05 06 2022 https://rusjbpc.ru/en/nauka/article/53543/view

Настоящая работа посвящена решению фундаментальной научной задачи — раз-работке научных основ и методологии создания прототипа аппаратно-программного комплекса неинвазивного выявления и локализации патологий жи-вых тканей человека на основе динамического радиотермокартирования, предна-значенного для ранней диагностики онкологических заболеваний и мониторинга процессов их лечения, а также может использоваться в персонализированной медицины. Использование современного программного обеспечения и технологии монолитных интегральных схем СВЧ позволят применить новые подходы к раз-работке принципиально нового устройства — многоканального многочастотного радиотермографа на основе технологии МИС.

This work is devoted to solving a fundamental scientific problem – the development of scientific foundations and methodology for creating a prototype of a hardware and software complex for noninvasive detection and localization of pathologies of living human tissues based on dynamic radiothermic mapping, designed for early diagnosis of oncological diseases and monitoring of their treatment processes, and can also be used in personalized medicine. The use of modern software and technology of mono-lithic integrated microwave circuits will allow us to apply new approaches to the de-velopment of a fundamentally new device – a multi-channel multi-frequency radio-thermograph based on MIC technology.

 радиотермометрия радиотермограф многоканальность многочастотность. radiothermometry radiothermograph multi-channel multi-frequency.

Carr K. L. Microwave radiometry : Its importance to the detection of cancer // IEEE Trans. Microw. Theory Techn. 1989. Vol. 37, no. 12, P. 1862-1869. K. L. Carr, “Microwave radiometry: its importance to the detection of cancer,” IEEE Transactions on Microwave Theory and Techniques, vol. 37, no. 12, pp. 1862-1869, 1989, doi: 10.1109/22.44095. Modern microwave thermometry for breast cancer. Journal of Molecular Imaging & Dynamics / S.Vesnin et al. 2017. URL: https://www.longdom.org/open-access/modern-microwave-thermometry-for-breast-cancer-2155-9937-1000136.pdf. S.Vesnin et al., “Modern microwave thermometry for breast cancer,” Journal of Molecular Imag-ing & Dynamics, 2017. URL: https://www.longdom.org/open-access/modern-microwave-thermometry-for-breast-cancer-2155-9937-1000136.pdf. Passive microwave radiometry in biomedical studies / I. Goryanin et al. // Drug Discovery Today. 2020. Vol. 25(4). P. 757-763. I. Goryanin et al., “Passive microwave radiometry in biomedical studies,” Drug Discovery To-day, vol. 25, no. 4, pp. 757-763, Apr. 2020, doi: 10.1016/j.drudis.2020.01.016. Noninvasive detection of increased carotid artery temperature in patients with coronary artery disease predicts major cardiovascular events at one year : Results from a prospective multicenter study // K. Toutouzas et al. // Atherosclerosis 2017. Vol. 262. P. 25-30. K. Toutouzas et al., “Noninvasive detection of increased carotid artery temperature in patients with coronary artery disease predicts major cardiovascular events at one year: Results from a pro-spective multicenter study,” Atherosclerosis, vol. 262, pp. 25-30, Jul. 2017, doi: 10.1016/j.atherosclerosis.2017.04.019. The role of microwave radiometry in carotid artery disease. Diagnostic and clinical prospective / M. Drakopoulou et al. // Current Opinion in Pharmacology. 2018. Vol. 39. P. 99-104. M. Drakopoulou, C. Moldovan, K. Toutouzas, and D. Tousoulis, “The role of micro-wave radi-ometry in carotid artery disease. Diagnostic and clinical prospective,” Current Opinion in Pharma-cology, vol. 39, pp. 99-104, Apr. 2018, doi: 10.1016/j.coph.2018.02.008. Real-time passive brain monitoring system using near-field microwave radiometry / E. Groumpas et al. // IEEE Trans. on Biomedical Engineering. 2019. Vol. 67, no.1. P. 158-165. E. Groumpas, M. Koutsoupidou, I. S. Karanasiou, C. Papageorgiou, and N. Uzunoglu, “Real-Time Passive Brain Monitoring System Using Near-Field Microwave Radiometry,” IEEE Transac-tions on Biomedical Engineering, vol. 67, no. 1, pp. 158-165, Jan. 2020, doi: 10.1109/tbme.2019.2909994. Kublanov V. S., Borisov V. I. Biophysical evaluation of microwave radiation for functional research of the human brain // Proc. IFMBE. 2017. P. 1045-1048. V. S. Kublanov & V. I. Borisov, “Biophysical evaluation of microwave radiation for functional research of the human brain”, in Proc. IFMBE, pp.1045-1048, 2017. Use of multichannel microwave radiometry for functional diagnostics of the brain / A. G. Gudkov et al. // Biomedical Engineering. 2019. Vol. 53, no.2. P. 108-111. A. G. Gudkov et al., “Use of Multichannel Microwave Radiometry for Functional Diagnostics of the Brain,” Biomedical Engineering, vol. 53, no. 2, pp. 108-111, Jul. 2019, doi: 10.1007/s10527-019-09887-z. Diagnostic opportunities of noninvasive brain thermomonitoring / D.V. Cheboksarov et al. // Anesteziologiia i Reanimatologiia. 2015. Vol. 60 (1). P. 66-69. D. V. Cheboksarov et al., “Diagnostic opportunities of noninvasive brain thermomonitoring”, Anesteziologiia i Reanimatologiia, vol. 60 (1), pp. 66-69, 2015 Therapeutic Hypothermia Systems / O. A. Shevelev et al. // Biomed. Eng. 2021. Vol. 54. P. 397-401. O. A. Shevelev et al., “Therapeutic Hypothermia Systems,” Biomedical Engineering, vol. 54, no. 6, pp. 397-401, Mar. 2021, doi: 10.1007/s10527-021-10048-4. Microwave radiometry for noninvasive monitoring of brain temperature / D. B. Rodrigues et al. In : Emerging electromagnetic technologies for brain diseases diagnostics, monitoring and therapy. Springer, Cham, 2018. P. 87-127. D. B. Rodrigues et al., “Microwave radiometry for noninvasive monitoring of brain tempera-ture” in Emerging electromagnetic technologies for brain diseases diagnostics, monitoring and ther-apy, Springer, Cham, 2018. Joint microwave radiometry for inflammatory arthritis assessment / K. Laskari et al. // Rheumatology. 2020. Vol.59 (4). P. 839-844. K. Laskari et al., “Joint microwave radiometry for inflammatory arthritis assessment,” Rheuma-tology, vol. 59, no. 4, pp. 839-844, Sep. 2019, doi: 10.1093/rheumatology/kez373. Ravi V. M., Sharma A. K., Arunachalam K. Pre-clinical testing of microwave radiometer and a pilot study on the screening inflammation of knee joints // Bioelectromagnetics. 2019. Vol. 40, no. 6. P. 402-411. V. M. Ravi, A. K. Sharma, and K. Arunachalam, “Pre-Clinical Testing of Microwave Radiome-ter and a Pilot Study on the Screening Inflammation of Knee Joints,” Bioelectromagnetics, Jul. 2019, doi: 10.1002/bem.22203. Detection of vesicoureteral reflux using microwave radiometry-system characterization with tissue phantoms / Arunachalam K. et al. // IEEE Transactions on biomedical engineering. 2011. Vol. 58, no. 6. P. 1629-1636. K. Arunachalam et al., “Detection of Vesicoureteral Reflux Using Microwave Radiometry-System Characterization With Tissue Phantoms,” IEEE Transactions on Biomedical Engineering, vol. 58, no. 6, pp. 1629-1636, Jun. 2011, doi: 10.1109/tbme.2011.2107515. Jacobsen S., Klemetsen Ø., Birkelund Y. Vesicoureteral reflux in young children: a study of radiometric thermometry as detection modality using an ex vivo porcine model // Physics in Medicine & Biology. 2012. Vol. 57, no. 17. P. 5557-5573. S. Jacobsen, Ø. Klemetsen, and Y. Birkelund, “Vesicoureteral reflux in young children: a study of radiometric thermometry as detection modality using an ex vivo porcine model”, Physics in Med-icine & Biology, vol. 57, no.17, p. 5557, 2012. Measurement of brown adipose tissue activity using microwave radiometry and 18F-FDG PET/CT / J. P. Crandall et al. // Journal of Nuclear Medicine. 2018. Vol. 59, no. 8. P. 1243-1248. J. P. Crandall et al., “Measurement of Brown Adipose Tissue Activity Using Microwave Radi-ometry and 18F-FDG PET/CT,” Journal of Nuclear Medicine, vol. 59, no. 8, pp. 1243-1248, Feb. 2018, doi: 10.2967/jnumed.117.204339. Andreev V. V., Barantsevich E. R. Treatment of acute and chronic pain syndromes in lumbosacral radiculopathy // Effect. Pharmacother. 2018. Vol. 4. P. 42-49. V. V. Andreev, and E. R. Barantsevich, “Treatment of acute and chronic pain syndromes in lumbosacral radiculopathy,” Effect. Pharmacother., vol. 4, pp. 42-49, 2018. Influence of Ambient Temperature on Recording of Skin and Deep Tissue Temperature in Region of Lumbar Spine / A. V. Tarakanov et al. // European Journal of Molecular & Clinical Medicine. 2020. Vol. 7(1). P. 21-26. A. V. Tarakanov et al., “Influence of Ambient Temperature on Recording of Skin and Deep Tissue Temperature in Region of Lumbar Spine,” European Journal of Molecular & Clinical Medi-cine, vol. 7(1), pp. 21-26, 2020. Microwave Radiometry (MWR) temperature measurement is related to symptom severity in patients with Low Back Pain (LBP) / A. V. Tarakanov et al. // Journal of Bodywork and Movement Therapies. 2021. Vol. 26. P. 548-552. A. V. Tarakanov, A. A. Tarakanov, S. Vesnin, V. V. Efremov, I. Goryanin, and N. Roberts, “Microwave Radiometry (MWR) temperature measurement is related to symptom severity in pa-tients with Low Back Pain (LBP),” Journal of Bodywork and Movement Therapies, vol. 26, pp. 548-552, Apr. 2021, doi: 10.1016/j.jbmt.2021.02.005. Passive Microwave Radiometry for the Diagnosis of Coronavirus Disease 2019 Lung Complications in Kyrgyzstan / B. Osmonov et al. // Diagnostics. 2021. No. 11(2). P. 259. B. Osmonov et al., “Passive Microwave Radiometry for the Diagnosis of Coronavirus Disease 2019 Lung Complications in Kyrgyzstan,” Diagnostics, vol. 11, no. 2, p. 259, Feb. 2021, doi: 10.3390/diagnostics11020259. Momenroodaki P. Noninvasive internal body temperature tracking with near-field microwave radiometry // IEEE Trans. on Microwave Theory and Techniques. 2018. Vol. 66 (5). P. 2535-2545. P. Momenroodaki, W. Haines, M. Fromandi, and Z. Popovic, “Noninvasive Internal Body Temperature Tracking With Near-Field Microwave Radiometry,” IEEE Transactions on Mi-crowave Theory and Techniques, vol. 66, no. 5, pp. 2535-2545, May 2018, doi: 10.1109/tmtt.2017.2776952. Stable microwave radiometry system for long term monitoring of deep tissue temperature / P. R. Stauffer et al. // Proc. SPIE 2013, P. 8584. P. R. Stauffer et al., “Stable microwave radiometry system for long term monitoring of deep tissue temperature” Energy-based Treatment of Tissue and Assessment VII. - International Society for Optics and Photonics, vol. 8584, p. 85840R, 2013. Wireless system for continuous monitoring of core body temperature / W. Haines et al. // Proc. IEEE MTT-S International Microwave Symposium (IMS). June 4-9, 2017, Honololu, USA. 2017. P. 541-543. W. Haines et al., “Wireless system for continuous monitoring of core body temperature”, in Proc. IEEE MTT-S International Microwave Symposium (IMS)., Honololu, USA, June 4-9, 2017. Popovic Z., Momenroodaki P., Scheeler R. Toward wearable wireless thermometers for internal body temperature measurements // IEEE Communications Magazine. 2014. Vol. 52 (10). P. 118-125. Z. Popovic, P. Momenroodaki, and R. Scheeler, “Toward wearable wireless thermometers for internal body temperature measurements,” IEEE Communications Magazine, vol. 52, no. 10, pp. 118-125, Oct. 2014, doi: 10.1109/mcom.2014.6917412. Momenroodaki P., Haines W., Popovic Z. Non-invasive microwave thermometry of multi-layer human tissues. In Proc. IEEE MTT-S International Microwave Symposium (IMS), June 4-9, 2017. Honololu, USA. P. 1387-1390. P. Momenroodaki, W. Haines, Z. Popovic, “Non-invasive microwave thermometry of multilayer human tissues” in Proc. IEEE MTT-S Interna-tional Microwave Symposium (IMS), Hon-ololu, USA, June 4-9, 2017. Ravi V. M., Arunachalam, K. A low noise stable radiometer front-end for passive microwave tissue thermometry // Journal of Electromagnetic Waves and Applications, Vol. 33(6). P. 743-758. V. M. Ravi, and K.Arunachalam, “A low noise stable radiometer front-end for passive microwave tissue thermometry,” Journal of Electromagnetic Waves and Applications, vol. 33(6), pp. 743-758, 2019. Maccarini P.F. et al. A novel compact microwave radiometric sensor to noninvasively track deep tissue thermal profiles. In 2015 European Microwave Conference (EuMC). 2015, pp. 690-693. P. F. Maccarini et al., “A novel compact micro-wave radiometric sensor to noninvasively track deep tissue thermal profiles,” in 2015 European Microwave Conference (EuMC), pp. 690-693, 2015. Functional link between distal vasodilation and sleep-onset latency? / K. Kräuchi et al. // Amer. J. Physiol. - Reg., Integr. Comparative Physiol. 2000. Vol. 278, no. 3, P. R741-R748. K. Kräuchi et al., “Functional link between distal vasodilation and sleep-onset latency?” Amer. J. Physiol. - Reg., Integr. Comparative Physiol., 2000, vol. 278, no. 3, pp. R741-R748. Effects of light treatment on core body temperature in seasonal affective disorder / N. E. Rosenthal et al. // Biol. Psychiatry. 1990. Vol. 27, no. 1. P. 39-50. N. E. Rosenthal et al., “Effects of light treatment on core body temperature in seasonal affective disorder,” Biological Psychiatry, vol. 27, no. 1, pp. 39-50, Jan. 1990, doi: 10.1016/0006-3223(90)90018-w. Disruption of circadian rhythms accelerates development of diabetes through pancreatic betacell loss and dysfunction / J. E. Gale et al. // J. Biol. Rhythms. 2011. Vol. 26, no. 5. P. 423-433. J. E. Gale, H. I. Cox, J. Qian, G. D. Block, C. S. Colwell, and A. V. Matveyenko, “Disruption of Circadian Rhythms Accelerates Development of Diabetes through Pancreatic Beta-Cell Loss and Dysfunction,” Journal of Biological Rhythms, vol. 26, no. 5, pp. 423-433, Sep. 2011, doi: 10.1177/0748730411416341. Circadian rhythms govern cardiac repolarization and arrhythmogenesis / D. Jeyaraj et al. // Nature. 2012. Vol. 483, no. 7387. P. 96-99. D. Jeyaraj et al., “Circadian rhythms govern cardiac repolarization and arrhythmogenesis,” Nature, vol. 483, no. 7387, pp. 96-99, Feb. 2012, doi: 10.1038/nature10852. Detection of extravasation of antineoplastic drugs by microwave radiometry / J. Shaeffer et al. // Cancer Lett. 1986. Vol. 31, no. 3. P. 285-291. J. Shaeffer, A. M. El-Mahdi, A. E. Hamwey, and K. L. Carr, “Detection of extravasation of antineoplastic drugs by microwave radiometry,” Can-cer Letters, vol. 31, no. 3, pp. 285-291, Jun. 1986, doi: 10.1016/0304-3835(86)90149-7. Jacobsen S., Stauffer P. R. Multifrequency radiometric determination of temperature profiles in a lossy homogeneous phantom using a dual-mode antenna with integral water bolus // IEEE Trans. Microw. Theory Techn. 2002. Vol. 50, no. 7. P. 1737-1746. S. Jacobsen and P. R. Stauffer, “Multifrequency radiometric determination of temperature profiles in a lossy homogeneous phantom using a dual-mode antenna with integral water bolus,” IEEE Transactions on Microwave Theory and Tech-niques, vol. 50, no. 7, pp. 1737-1746, Jul. 2002, doi: 10.1109/tmtt.2002.800424. Non-invasive temperature profiling using multi-frequency microwave radiometry in the presence of water-filled bolus / S. Mizushina et al. // IEICE Trans. Electron. 1991. Vol. 74, no. 5. P. 1293-1302. S. Mizushina et al., “Non-invasive temperature profiling using multi-frequency micro-wave radiometry in the presence of water-filled bolus,” IE-ICE Trans. Electron., vol. 74, no. 5, pp. 1293-1302, May 1991. Monitoring of deep brain temperature in infants using multi-frequency microwave radiometry and thermal modelling / J. W. Hand et al. // Phys. Med. Biol. 2001. Vol. 46, no. 7. P. 1885-1903. J. W. Hand et al., “Monitoring of deep brain temperature in infants using multi-frequency microwave radiometry and thermal modelling,” Phys-ics in Medicine and Biology, vol. 46, no. 7, pp. 1885-1903, Jun. 2001, doi: 10.1088/0031-9155/46/7/311. Moran D. S., Mendal L. Core temperature measurement // Sports Med. 2002. Vol. 32, no. 14. P. 879-885. D. S. Moran and L. Mendal, “Core Temperature Measurement,” Sports Medicine, vol. 32, no. 14, pp. 879-885, 2002, doi: 10.2165/00007256-200232140-00001. Byrne C., Lim C. L. The ingestible telemetric body core temperature sensor : A review of validity and exercise applications // Brit. J. Sports Med. 2007. Vol. 41, no. 3. P. 126-133. C. Byrne and C. L. Lim, “The ingestible telemet-ric body core temperature sensor: a review of validity and exercise applications,” British Journal of Sports Medicine, vol. 41, no. 3, pp. 126-133, Mar. 2007, doi: 10.1136/bjsm.2006.026344. The effect of cool water ingestion on gastrointestinal pill temperature / D. M. Wilkinson et al. // Med. Sci. Sports Exercise. 2008. Vol. 40, no. 3. P. 523-528. D. M. Wilkinson, J. M. Carter, V. L. Richmond, S. D. Blacker, and M. P. RAYSON, “The Effect of Cool Water Ingestion on Gastrointestinal Pill Temperature,” Medicine & Science in Sports & Exercise, vol. 40, no. 3, pp. 523-528, Mar. 2008, doi: 10.1249/mss.0b013e31815cc43e. Accurate temperature imaging based on intermolecular coherences in magnetic resonance / G. Galiana et al. // Science. 2008. Vol. 322, no. 5900. P. 421-424. G. Galiana, R. T. Branca, E. R. Jenista, and W. S. Warren, “Accurate Temperature Imaging Based on Intermolecular Coherences in Magnetic Res-onance,” Science, vol. 322, no. 5900, pp. 421-424, Oct. 2008, doi: 10.1126/science.1163242. Kraus J. D. Radio Astronomy, 2nd ed. Cygnus-Quasar Books, 1976, P. 1-3, 20-23, 66. J. D. Kraus, Radio Astronomy, 2nd ed. Cygnus-Quasar Books, 1976. Ulaby F. T., Moore R. K., Fung A. K. Microwave Remote Sensing : Active and Passive, Vol. 1 : Microwave Remote Sensing Fundamentals and Radiometry. Artech House, 1981, P. 1-3, 20-24, 93-94, 112, 122-123. F. T. Ulaby, R. K. Moore, and A. K. Fung, Mi-crowave Remote Sensing: Active and Passive, Volume 1: Microwave Remote Sensing Fundamen-tals and Radiometry, Artech House, 1981. Klemetsen O. Design and evaluation of a medical microwave radiometer for observing temperature gradients subcutaneously in the human body : PhD thesis. University of Tromso, faculty of science department of physics and technology. Tromso, 2011. 92 p. O. Klemetsen, Design and evaluation of a medi-cal microwave radiometer for observing temperature gradients subcutaneously in the human body: PhD thesis. University of Tromso, faculty of science department of physics and technology, Trom-so, 2011. Development of a miniature microwave radiothermograph for monitoring the internal brain temperature / M. Sedankin et al. // Восточно-Европейский журнал передовых технологий. 2018. Т. 3(5). С. 26-36. M. Sedankin, D. Chupina, S. Vesnin, I. Nelin, and V. Skuratov, “Development of a miniature microwave radiothermograph for monitoring the internal brain temperature,” Eastern-European Journal of Enterprise Technologies, vol. 3, no. 5 (93), pp. 26-36, Jun. 2018, doi: 10.15587/1729-4061.2018.134130. Chupina D. N., Sedankin M. K., Vesnin S. G. Application of modern technologies of mathematical simulation for the development of medical equipment. In 2017 IEEE 11th International Conference on Application of Information and Communication Technologies (AICT). Р. 1-5. D.N. Chupina, M.K. Sedankin, S. G. Vesnin, “Application of modern technologies of mathematical simulation for the development of medical equipment,” in 2017 IEEE 11th International Conference on Application of Information and Com-munication Technologies (AICT), p. 1-5, 2017. Gawande R., Bradley R. Low-Noise Amplifier at 2.45 GHz // Microwave Magazine. 2009. Vol 11. P. 122-126. R. Gawande and R. Bradley, “Low-Noise Am-plifier at 2.45 GHz [TC Contests,” IEEE Mi-crowave Magazine, vol. 11, no. 1, pp. 122-126, Feb. 2010, doi: 10.1109/mmm.2009.935619. A ultrawideband 3-10 GHz low-noise amplifier MMIC using inductive-series peaking technique / Chia-Song Wu et al. // Electric Information and Control Engineering IEEE. 2020. Vol. 2. P. 5667-5670. Chia-Song Wu, Tahyeong Lin, Chien-Huang Chang, and Hsien-Ming Wu, “A ul-trawideband 3-10 GHz low-noise amplifier MMIC using in-ductive-series peaking technique,” Electric Information and Control Engineering, vol. 2, pp. 5667-5670, 2020. Increasing efficiency of GaN HEMT transistors in equipment for radiometry using numerical simulation / V. Tikhomirov et al. // Semiconductors. 2016. Vol. 50, no. 2. P. 244-248. V. G. Tikhomirov et al., “Optimization of the parameters of HEMT GaN/AlN/AlGaN heterostructures for microwave transistors using numerical simulation,” Semiconductors, vol. 50, no. 2, pp. 244-248, Feb. 2016, doi: 10.1134/s1063782616020263. Increasing efficiency of GaN HEMT transistors in equipment for radiometry using numerical simulation / V G. Tikhomirov et al. // Journal of Physics Conference Series. 2019. Vol. 1410. Iss. 1. P. 012191. V. G. Tikhomirov, A. G. Gudkov, S. V. Agas-ieva, D. D. Dynaiev, M. K. Popov, and S. V. Chizhikov, “Increasing efficiency of GaN HEMT transistors in equipment for radiometry using numerical simulation,” Journal of Physics: Confer-ence Series, vol. 1410, no. 1, p. 012191, Dec. 2019, doi: 10.1088/1742-6596/1410/1/012191.