
Ð”Ð°Ð½Ð½Ð°Ñ Ñ€Ð°Ð±Ð¾Ñ‚Ð° поÑвÑщена увеличению ÑнергетичеÑкой ÑффективноÑти оконечных каÑкадов уÑилителей мощноÑти радиопередающих уÑтройÑтв диапазона ОВЧ. Ð’ ходе работы была разработана аналитичеÑÐºÐ°Ñ Ð¼Ð¾Ð´ÐµÐ»ÑŒ ключевого уÑÐ¸Ð»Ð¸Ñ‚ÐµÐ»Ñ Ð¼Ð¾Ñ‰Ð½Ð¾Ñти клаÑÑа Е, оценены его Ñпектральные и ÑнергетичеÑкие характериÑтики Ñ Ð¿Ð¾Ð¼Ð¾Ñ‰ÑŒÑŽ имитационного моделированиÑ. Ð’ ходе Ð²Ñ‹Ð¿Ð¾Ð»Ð½ÐµÐ½Ð¸Ñ Ð’ÐšÐ Ð±Ñ‹Ð»Ð° разработана аналитичеÑÐºÐ°Ñ Ð¼Ð¾Ð´ÐµÐ»ÑŒ уÑÐ¸Ð»Ð¸Ñ‚ÐµÐ»Ñ Ð¼Ð¾Ñ‰Ð½Ð¾Ñти клаÑÑа Е Ñ Ð¿Ð¾Ð¼Ð¾Ñ‰ÑŒÑŽ которой были получены Ð·Ð½Ð°Ñ‡ÐµÐ½Ð¸Ñ Ð¿Ð°Ñ€Ð°Ð¼ÐµÑ‚Ñ€Ð¾Ð² нагрузочной цепи УМ Ð´Ð»Ñ Ð¾Ð±ÐµÑÐ¿ÐµÑ‡ÐµÐ½Ð¸Ñ ÐºÐ¾Ñ€Ñ€ÐµÐºÑ‚Ð½Ð¾Ð¹ работы в клаÑÑе Е. Имитационное моделирование показало, что форма напрÑÐ¶ÐµÐ½Ð¸Ñ Ð½Ð° Ñтоке транзиÑтора ÑоответÑтвует типичной форме напрÑÐ¶ÐµÐ½Ð¸Ñ Ð£Ðœ клаÑÑа Е, также было показано, что можно получить в нагрузке мощноÑть 204Ð’Ñ‚ при КПД 97,5%, при Ñтом отноÑительный уровень побочных гармоник ÑоÑтавил не более Ð¼Ð¸Ð½ÑƒÑ 70дБ, что удовлетворÑет требованиÑм ГОСТ. Отличие результатов Ð¼Ð¾Ð´ÐµÐ»Ð¸Ñ€Ð¾Ð²Ð°Ð½Ð¸Ñ Ð¸ аналитичеÑкого раÑчёта ÑоÑтавило не более 7 %. Результаты данной ВКРмогут быть иÑпользованы при поÑтроении радиопередающих уÑтройÑтв диапазона ОВЧ Ð´Ð»Ñ ÑиÑтем метеорной радиоÑвÑзи.
The subject of the graduate qualification work is «Class E VHF power amplifier» This work is devoted to increasing efficiency of very high frequency power amplifiers. During this work an analytic model was developed. Results of calculations, based on this model were used in creating a proper load network, containing forming contour and 5-th order elliptic filter. During simulation of developed amplifier schematic, the following tasks were solved: Estimate of power amplifier output power Estimate of power amplifier spectral characteristics Estimate of power amplifier efficiency The results of graduate qualification work are: Developed analytic model for class E VHF power amplifier load network characteristics, dependent on amplifier parameters. Simulation showed that an output power of 204W was achieved with efficiency of 97.5 percent. Spectral characteristics of developed amplifier schematic responds to state standard (GOST), specifically 3-rd harmonic has the highest level of minus 70db with respect to first. The difference between calculations based on analytic model, and simulation is less than 7%. The results of this qualification graduate work can be used in RF applications, such as portable or non-portable radio transmitters, meteor radio communication systems, final stage power amplifiers or other VHF applications.
вÑÑ Ð¾Ð´Ð½Ð°Ñ Ð¼Ð¾ÑноÑÑÑ, analytic model, output power, switching, simulation model, power amplifier, имиÑаÑÐ¸Ð¾Ð½Ð½Ð°Ñ Ð¼Ð¾Ð´ÐµÐ»Ñ, class E, меÑод гаÑмониÑеÑкого баланÑа, коÑÑÑиÑÐ¸ÐµÐ½Ñ Ð¿Ð¾Ð»ÐµÐ·Ð½Ð¾Ð³Ð¾ дейÑÑвиÑ, линейнÑй, forming contour, ÑоÑмиÑÑÑÑий конÑÑÑ, harmonic balance method, linear, efficiency, ÑÑилиÑÐµÐ»Ñ Ð¼Ð¾ÑноÑÑи, аналиÑиÑеÑÐºÐ°Ñ Ð¼Ð¾Ð´ÐµÐ»Ñ, клÑÑевой, FET (field effect transistor), полевой ÑÑанзиÑÑоÑ, клаÑÑ Ð
вÑÑ Ð¾Ð´Ð½Ð°Ñ Ð¼Ð¾ÑноÑÑÑ, analytic model, output power, switching, simulation model, power amplifier, имиÑаÑÐ¸Ð¾Ð½Ð½Ð°Ñ Ð¼Ð¾Ð´ÐµÐ»Ñ, class E, меÑод гаÑмониÑеÑкого баланÑа, коÑÑÑиÑÐ¸ÐµÐ½Ñ Ð¿Ð¾Ð»ÐµÐ·Ð½Ð¾Ð³Ð¾ дейÑÑвиÑ, линейнÑй, forming contour, ÑоÑмиÑÑÑÑий конÑÑÑ, harmonic balance method, linear, efficiency, ÑÑилиÑÐµÐ»Ñ Ð¼Ð¾ÑноÑÑи, аналиÑиÑеÑÐºÐ°Ñ Ð¼Ð¾Ð´ÐµÐ»Ñ, клÑÑевой, FET (field effect transistor), полевой ÑÑанзиÑÑоÑ, клаÑÑ Ð
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