Title :
An ultra-linear wideband feedforward power amplifier for digital communication systems
Author :
Kao, Yao-Huang ; Shi, Wen-Kuo
Author_Institution :
Inst. of Commun. Eng., Nat. Chiao-Tung Univ., Hsin-Chu, Taiwan
Abstract :
This paper describes a ultra-linear wide-band, power amplifier for digital communication. The amplifier use the feedforward technique to improve linearity (original power amplifier P1dB=34dBm). The total power after linearization is about 1W. The third-order intermodulation products (IMD3) to carrier are less than -64dBc and the IMD3 cancellation reaches about 30dB for two-tone test in the 900MHz region. Then new power amplifier can pass N-band CDMA ACPR ( IS-95 standard) and the operation bandwidth is more than 25MHz(869 894MHz)
Keywords :
UHF power amplifiers; code division multiple access; digital communication; feedforward; intermodulation distortion; linearisation techniques; wideband amplifiers; 1 W; 25 MHz; 900 MHz; IS-95 standard; N-band CDMA ACPR; digital communication system; linearization; third-order intermodulation product; two-tone test; ultra-linear wideband feedforward power amplifier; Bandwidth; Broadband amplifiers; Digital communication; Linearity; Multiaccess communication; Operational amplifiers; Power amplifiers; Testing; Ultra wideband communication; Ultra wideband technology;
Conference_Titel :
Microwave Conference, 2001. APMC 2001. 2001 Asia-Pacific
Conference_Location :
Taipei
Print_ISBN :
0-7803-7138-0
DOI :
10.1109/APMC.2001.985370
