Modified Class-F power amplifier design with fundamental frequency output impedance load

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dc.contributor.authorPakasiri, Chatrpol
dc.contributor.authorManasummakij, Prateep
dc.contributor.authorWang, Sen
dc.date.accessioned2026-08-06T10:32:23Z
dc.date.available2026-08-06T10:32:23Z
dc.date.issued2021-04-01
dc.description.abstractA modified Class-F power amplifier with medium output power at 433 MHz was designed, simulated and implemented in this paper. The design process used a load condition of 1) output impedance of the amplifier at the fundamental frequency, 2) short-circuit loads at the even harmonics and 3) open-circuit loads at the odd harmonics. By biasing the circuit to be a typical Class-F, the circuit yielded moderate efficiency as the load condition was different from the optimum one. By strongly biasing the circuit toward that of Class-A, the load condition approached the optimum, but the circuit still yielded moderate efficiency due to the low efficiency nature of a Class-A amplifier. By proper choice of the operating point in Class-AB, a prototype circuit, with 9 dBm input power, yielded a maximum PAE of 68.5% with output power 21.8 dBm. Furthermore, at 11 dBm input power, the prototype yielded a better PAE 79.6% with 23.2 dBm output power. Our design procedure did not need expensive load-pull equipment.
dc.identifier.citationAEU International Journal of Electronics and Communications, 132, 2021
dc.identifier.doi10.1016/j.aeue.2021.153637
dc.identifier.issn14348411
dc.identifier.other2-s2.0-85100673233
dc.identifier.urihttps://dspace.kmitl.ac.th/handle/123456789/11977
dc.sourceAEU International Journal of Electronics and Communications
dc.subjectClass-F power amplifier
dc.subjectOperating point
dc.subjectUHF power amplifiers
dc.titleModified Class-F power amplifier design with fundamental frequency output impedance load
dc.typeArticle

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