Title :
CDMA handset power amplifier with a switched output matching circuit for low/high power mode operations
Author :
Kim, Seungwoo ; Lee, Jongwoo ; Shin, Jinho ; Kim, Bumman
Author_Institution :
Dept. of Electron. & Electr. Eng., Pohang Univ. of Sci. & Technol., Kyoungbuk, South Korea
Abstract :
This paper presents a switched output matching circuit for low/high power modes using a novel structure switch. By adjusting the output matching circuit for the power levels, the efficiency at a low-power region is improved significantly without compromising linearity and efficiency at a high-power region. This switched power amplifier provides 13% power-added efficiency (PAE) with adjacent-channel-power-ratio (ACPR) less than -48 dBc at an output power level of 16 dBm and 41% PAE with ACPR less than -43 dBc at 28 dBm.
Keywords :
code division multiple access; mobile handsets; power amplifiers; power integrated circuits; switching circuits; 13 percent; CDMA handset power amplifier; adjacent-channel-power-ratio; high power mode operations; low power mode operation; power level; power levels; power-added efficiency; switched output matching circuit; switched power amplifier; High power amplifiers; Impedance matching; Linearity; Multiaccess communication; Operational amplifiers; Power amplifiers; Power generation; Switches; Switching circuits; Telephone sets;
Conference_Titel :
Microwave Symposium Digest, 2004 IEEE MTT-S International
Print_ISBN :
0-7803-8331-1
DOI :
10.1109/MWSYM.2004.1338867
