Transmission line effects in Class D amplifiers - The peak control function as a design tool

Class D amplifiers find new applications in RFID systems, because of their high efficiency. Most textbooks describe the case of a load directly connected to the amplifier. However, in most RFID systems the usage of a transmission line is mandatory and this may introduce some novel effects, in the fo...

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Bibliographic Details
Published in2012 IEEE 18th International Symposium for Design and Technology in Electronic Packaging (SIITME) pp. 53 - 58
Main Authors Vuza, D. T., Frosch, R., Vladescu, M.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.10.2012
Subjects
Antennas
Class D Amplifier
Harmonic analysis
Impedance
Peak Control Function
Power harmonic filters
Power transmission lines
Radiofrequency identification
RFID
Transfer functions
Transmission Line
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Summary:Class D amplifiers find new applications in RFID systems, because of their high efficiency. Most textbooks describe the case of a load directly connected to the amplifier. However, in most RFID systems the usage of a transmission line is mandatory and this may introduce some novel effects, in the form of an infinite series of peaks in the system transfer functions. If not appropriately taken care of, these effects may lead to EMC issues. The purpose of the paper is to introduce the peak control function that allows the designer to keep the magnitude of the peaks and hence their influence on the system into well defined limits.
ISBN:1467347604
9781467347600
DOI:10.1109/SIITME.2012.6384345