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


Autoria(s): Thian, M.; Fusco, V.
Data(s)

01/03/2011

Resumo

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 50O load. © 2011 Institut fur Mikrowellen.

Identificador

http://pure.qub.ac.uk/portal/en/publications/highefficiency-lowvoltagestress-classef-pa-with-extended-maximum-operating-frequency(111f883c-6490-4959-9038-474a55b03b63).html

http://www.scopus.com/inward/record.url?partnerID=yv4JPVwI&eid=2-s2.0-79957509127&md5=b302a6164a4567b50defd4b6f9b874ad

Idioma(s)

eng

Direitos

info:eu-repo/semantics/restrictedAccess

Fonte

Thian , M & Fusco , V 2011 , ' High-efficiency low-voltage-stress Class-EF PA with extended maximum operating frequency ' Paper presented at GEMIC , Darmstadt , Germany , 01/03/2011 - 01/03/2011 , pp. 1-4 .

Tipo

conferenceObject