NDLI: High-efficiency low-voltage-stress Class-EF PA with extended maximum operating frequency

Content Provider	IEEE Xplore Digital Library
Author	Thian, M. Fusco, V.
Copyright Year	2011
Description	Author affiliation: Queen's University Belfast, ECIT Institute, Queen's Road, Queen's Island, Belfast, BT3 9DT, U.K. (Thian, M.; Fusco, V.)
Abstract	The Class-EF power amplifier (PA) introduced recently has a peak switch voltage much lower than the well-known Class-E PA. However, the value of the transistor output capacitance at high frequencies is typically larger than the required Class-EF optimum shunt capacitance. As a result, softswitching operation that minimizes power dissipation during OFF-to-ON transient cannot be achieved at high frequencies. A novel Class-EF topology with transmission-line load network proposed in this paper allows the PA to operate at much higher frequencies without trading the other figures of merit. Closed-form formulations are derived to simultaneously satisfy the Class-EF impedances requirement at fundamental frequency, all even harmonics, and the first two odd harmonics as well as to provide matching to 50Ω load.
Starting Page	1
Ending Page	4
File Size	172506
Page Count	4
File Format	PDF
ISBN	9781424492251
e-ISBN	9783981266825
e-ISBN	9783981266832
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-03-14
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institut fur Mikrowellen- und Antennentechnik e.V.
Subject Keyword	Class E Switches Harmonic analysis harmonic tuning transmission lines Inductance Power amplifiers Class EF high efficiency switching amplifiers Capacitance low voltage stress power amplifiers Transistors transistor circuits Power generation
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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