Title :
A wide-band high-linearity feedforward power amplifier for digital communication systems
Author :
Zhu, Xiaowei ; Zhou, Jimyi ; Feng, Limin ; Cheng Qian ; Hong, Wei ; Chen, Yiyuan
Author_Institution :
Dept. of Radio Eng., Southeast Univ., Nanjing, China
fDate :
6/21/1905 12:00:00 AM
Abstract :
This paper describes a wide-band high linearity, high DC efficiency and low cost power amplifier for digital communication system. Feedforward technique is applied and the adaptive control techniques are employed for ensuring performance stability in the linearized amplifier. The third-order intermodulation products (IMD3) are less than -62 dBc and the intermodulation distortion cancellation reaches 24 dB. The operation bandwidth is more than 20 MHz and maximum output power is great than 40 dBm
Keywords :
UHF circuits; UHF power amplifiers; cellular radio; circuit stability; digital communication; digital radio; feedforward; intermodulation distortion; wideband amplifiers; DC efficiency; adaptive control techniques; digital communication systems; distortion cancellation; feedforward technique; operation bandwidth; output power; performance stability; third-order intermodulation products; wideband high-linearity feedforward power amplifier; Adaptive control; Bandwidth; Broadband amplifiers; Costs; Digital communication; High power amplifiers; Intermodulation distortion; Linearity; Power generation; Stability;
Conference_Titel :
Microwave Conference, 1999 Asia Pacific
Print_ISBN :
0-7803-5761-2
DOI :
10.1109/APMC.1999.828040
