Title :
CMOS phase shifted transmitters for 4G wireless systems
Author :
Hamedi-Hagh, Sotoudeh ; Salama, C. André T
Author_Institution :
Dept. of Electr. & Comput. Eng., Toronto Univ., Ont., Canada
Abstract :
A novel phase shifted (PS) wireless transmitter architecture is presented. The PS transmitter employs switching power amplifiers, operates without mixers and provides an intermodulation distortion-free output spectrum, making it a suitable choice for mobile communication systems. The RF blocks of the PS transmitter include a local oscillator, phase shifters, switching class F power amplifiers and wideband output combiners. The PS transmitter, implemented in a standard 0.18 μm CMOS technology, occupies an area of 5 mm2. It operates from a 1 V supply and provides 40 dBc adjacent channel power ratio for output bandwidths up to 50 MHz at 8 GHz. The combined class F PAs in the PS transmitter provide 20 dBm output power with a 38% power added efficiency.
Keywords :
4G mobile communication; CMOS analogue integrated circuits; MMIC power amplifiers; integrated circuit design; mobile radio; oscillators; phase shifters; radio transmitters; 0.18 micron; 1 V; 1 mm; 4G wireless systems; 5 mm; 8 GHz; CMOS phase shifted transmitters; adjacent channel power ratio; class F power amplifiers; intermodulation distortion-free output; local oscillator; mobile communication systems; phase shifters; power added efficiency; switching power amplifiers; transmitter design; wideband output combiners; 4G mobile communication; Broadband amplifiers; CMOS technology; Communication switching; Intermodulation distortion; Local oscillators; Power amplifiers; Radio frequency; Radiofrequency amplifiers; Transmitters;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2004. PIMRC 2004. 15th IEEE International Symposium on
Print_ISBN :
0-7803-8523-3
DOI :
10.1109/PIMRC.2004.1370859
