Comparison of Class C and High Efficiency Class E Amplifiers at 435 MHz

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F19%3APU132079" target="_blank" >RIV/00216305:26220/19:PU132079 - isvavai.cz</a>
Result on the web
<a href="https://ieeexplore.ieee.org/document/8733545" target="_blank" >https://ieeexplore.ieee.org/document/8733545</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1109/RADIOELEK.2019.8733545" target="_blank" >10.1109/RADIOELEK.2019.8733545</a>

Result language
angličtina
Original language name
Comparison of Class C and High Efficiency Class E Amplifiers at 435 MHz
Original language description
This article deals with the comparison of class C and class E amplifiers designed with an identical transistor, substrate, and frequency. Both types of amplifiers have a theoretical efficiency of 100 %; however, more attention is paid to class E amplifier, because of its complexity and difficulty of design. The efficiency of both classes reached over 75 %. The working frequency of designed amplifiers was 435 MHz using lumped components. The topology of the class C amplifier is typical with input and output filter matching at the fundamental frequency, and the design of the class E amplifier is with shunt capacitance complemented with series resonant circuit fundamentally tuned. Class E amplifier with a shunt capacitance designed with E-pHEMT transistor is unique, because of small drain voltage which has a distinct influence on switching capacitor value which resulted in hundredths to units of picofarads. The amplifiers were simulated, manufactured and measured results were compared. The class E amplifier is therefore presented at such frequency where transmission lines cannot be used because of their length and even the lumped resonators tuned to higher harmonics frequency start to be undesignable.
Czech name
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Czech description
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Project
<a href="/en/project/LO1401" target="_blank" >LO1401: Interdisciplinary Research of Wireless Technologies</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
Proceedings of 29th International Conference Radioelektronika 2019
ISBN
978-1-5386-9321-6
ISSN
—
e-ISSN
—
Number of pages
4
Pages from-to
95-98
Publisher name
Neuveden
Place of publication
Pardubice, Czech Republic
Event location
Pardubice
Event date
Apr 16, 2019
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
000492026100015

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