Title :
High-efficiency amplifiers for portable handsets
Author :
T. Mader;M. Markovic;Z. B. Popovic;R. Tayrani
Abstract :
Achieving high-efficiency in rf and microwave amplifiers is
important for reducing the size and weight, and increasing the output
power, battery lifetime and reliability of portable wireless
transmitters. Here we present a switched-mode high-efficiency
transmission-line amplifier circuit with a measured 80% power-added
efficiency (PAE) with 0.55 W at 0.5 GHz, and 73% PAE with 0.94 W at 1
GHz from a single Siemens CLY5 MESFET. At 5 GHz from a Fujitsu FKL052WG,
0.61 W was obtained with 72% power added efficiency and 81% drain
efficiency. First-order design equations adequately predict the
amplifier behavior
Keywords :
"Telephone sets","Radiofrequency amplifiers","High power amplifiers","Microwave amplifiers","Power generation","Power amplifiers","Batteries","Transmitters","Switching circuits","Transmission lines"
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 1995. PIMRC´95. Wireless: Merging onto the Information Superhighway., Sixth IEEE International Symposium on
Print_ISBN :
0-7803-3002-1
DOI :
10.1109/PIMRC.1995.477361
