Open Access‘New’ solutions of Class‐E power amplifier with finite dc feed inductor at any duty ratio
Author(s) -
Du Xuekun,
Nan Jingchang,
Chen Wenhua,
Shao Zhenhai
Publication year - 2014
Publication title -
iet circuits, devices and systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.251
H-Index - 49
ISSN - 1751-8598
DOI - 10.1049/iet-cds.2013.0405
Subject(s) - amplifier , duty cycle , power (physics) , transistor , class (philosophy) , inductor , correctness , control theory (sociology) , high electron mobility transistor , mathematics , optimal design , voltage , topology (electrical circuits) , electrical engineering , electronic engineering , computer science , engineering , physics , algorithm , statistics , cmos , control (management) , quantum mechanics , artificial intelligence
‘New’ Class‐E solutions are proposed by varying three different design parameters which are introduced in the voltage and current equations in order to extend the Class‐E ‘design space’, of which the ‘new’ solutions can apply to optimal and suboptimal operation. The design procedure of suboptimal Class‐E power amplifier (PA) is analysed in details and then a suboptimal Class‐E PA based on GaN HEMT CGH40010F is designed to prove the correctness of the ‘new’ solutions. The measured maximum output power of 39.6 dB, power‐added‐efficiency of 74.7% and drain efficiency of 78.9% were obtained at 2.6 GHz with a 28 dBm input power. These measurement results show that a similar or better level of efficiency and output power that are reported for optimal Class‐E PAs at lower frequencies using the same transistor, and the presented ‘new’ solutions extend the ‘design space’ of Class‐E PA. This paper give engineers more degrees of freedom to design Class‐E PA.