title: Ð£ÑÐ¸Ð»Ð¸ÑÐµÐ»Ñ Ð¼Ð¾ÑÐ½Ð¾ÑÑÐ¸ ÐºÐ»Ð°ÑÑÐ° Ð Ð´Ð¸Ð°Ð¿Ð°Ð·Ð¾Ð½Ð° ÐÐÐ§
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ°
titleType: Subtitle
title: Class E VHF Power Amplifier
Creators: name: Ð¢ÑÐµÐ¹Ð¼ÑÑ, ÐÐ¸ÐºÐ¸ÑÐ°
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2021
Subjects: ÑÑÐ¸Ð»Ð¸ÑÐµÐ»Ñ Ð¼Ð¾ÑÐ½Ð¾ÑÑÐ¸
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Ð»Ð¸Ð½ÐµÐ¹Ð½ÑÐ¹
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Ð¸Ð¼Ð¸ÑÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ Ð¼Ð¾Ð´ÐµÐ»Ñ
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ÐºÐ»Ð°ÑÑ Ð
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Ð¼ÐµÑÐ¾Ð´ Ð³Ð°ÑÐ¼Ð¾Ð½Ð¸ÑÐµÑÐºÐ¾Ð³Ð¾ Ð±Ð°Ð»Ð°Ð½ÑÐ°
power amplifier
switching
linear
efficiency
analytic model
simulation model
FET (field effect transistor)
forming contour
class E
output power
harmonic balance method

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description: The subject of the graduate qualification work is Â«Class E VHF power amplifierÂ» 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.