Design of broadband Class E power amplifier in continuous operation modes. Issue 25 (1st December 2013)

• Record Type: Journal Article
• Authors: Gao, Zhong; Liu, Chang; Guo, Guiliang; Chen, Hua; Luo, Chao; Han, Jingyu; Zhang, Lijun; Yan, Yuepeng
• Is Part Of: Electronics letters. Volume 49:Issue 25(2013)
• Page Start: 1643
• Page End: 1645
• Publication Date: 2013-12-01
• Subjects: CMOS analogue integrated circuits -- integrated circuit design -- power amplifiers -- radiofrequency amplifiers -- UHF integrated circuits -- UHF power amplifiers -- wideband amplifiers; broadband parallel class E power amplifier -- DC‐to‐RF efficiency -- PA -- continuous class E mode -- load network topology -- TSMC CMOS process -- power added efficiency -- output power flattening -- size 0.18 mum -- efficiency 64 percent to 80 percent -- gain 0.5 dB -- frequency 360 MHz to 610 MHz; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2013.3119
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : Theoretically, constant output power and high DC‐to‐RF efficiency cannot be simultaneously achieved by a broadband Class E power amplifier (PA) even if the load network could provide the accurate impedance desired at each frequency point. Such a problem is solved with the presented concept of continuous Class E modes. New demands on the load and corresponding load network topology are discussed to provide a theoretical basis. To verify the feasibility, a prototype PA in TSMC 0.18 μm CMOS process is also presented. In the simulation, it exhibits a maximum output power of 18.7 dBm, a power added efficiency of 64–80% and an output power flattening of 0.5 dB in the frequency range from 360 to 610 M (52% of the central frequency). A comparison between it and a broadband parallel Class E PA implemented under the same conditions is also given.