Title :
Class-F power amplifier using a multi-frequency composite right/left-handed transmission line harmonic tuner
Author :
Dupuy, Alexandre ; Leong, Kevin M K H ; Itoh, Tatsuo
Author_Institution :
Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA
Abstract :
A class-F power amplifier at 2.4GHz using a novel harmonic tuner based on a composite right/left handed (CRLH) transmission line (TL) is proposed and experimentally tested. Two structures are presented. One structure uses one open CRLH-TL stub to suppress 2nd, 3rd harmonics and the fundamental frequency is matched to 50Ω. The other structure uses two open CRLH-TL stubs in order to suppress 2nd, 3rd, 4th harmonics and the fundamental frequency is matched to specific impedance. The structure proposed is used to design a class-F power amplifier. A maximum drain efficiency of 64% is obtained.
Keywords :
UHF power amplifiers; circuit tuning; harmonics suppression; metamaterials; transmission line theory; 2.4 GHz; 50 ohm; class-F power amplifier; composite right-left-handed transmission lines; harmonic tuner; harmonics suppression; left handed structures; metamaterials; right handed structures; Circuits; Frequency; High power amplifiers; Impedance; Metamaterials; Power amplifiers; Power system harmonics; Power transmission lines; Radiofrequency amplifiers; Tuners;
Conference_Titel :
Microwave Symposium Digest, 2005 IEEE MTT-S International
Print_ISBN :
0-7803-8845-3
DOI :
10.1109/MWSYM.2005.1517142
