Design of high efficiency power amplifier for RFID readers

Liming Gu, Yang Yang, Shichang Chen, Nemai Chandra Karmakar

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

2 Citations (Scopus)


In RFID reader systems, power amplifier plays a critical rule for efficiency enhancement. A high efficiency power amplifier may not only increase the life expectancy of portable RFID devices but also reduce the reliance on heat sinks. Heat sinks usually occupy plenty of space and lead to packing difficulties. A well-designed power amplifier with high efficiency and output power may also increase the reading range of RFID and system reliability, especially for the applications requiring long reading range (e.g. vehicle tagging in complicated traffics) or in a lossy environment (e.g. in sensing in rainy weather). This chapter systematically introduces the typical power amplifiers classified as Class A, AB, B, E, and F. The principles of Class F are emphasized due to its outstanding performance in efficiency enhancement. A practical design example is also presented, and also some recent typical techniques for improving the performances of Class F power amplifier are summarized.

Original languageEnglish
Title of host publicationChipless and conventional radio frequency identification
Subtitle of host publicationsystems for ubiquitous tagging
EditorsNemai Chandra Karmakar
Place of PublicationHershey
PublisherInformation Science Reference
Number of pages17
ISBN (Electronic)9781466616172
ISBN (Print)9781466616165, 1466616164
Publication statusPublished - 2012
Externally publishedYes


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