Title :
Envelope Following-Based RF Transmitters Using Switching-Mode Power Amplifiers
Author :
Jau, Je-Kuan ; Chen, Yu-An ; Horng, Tzyy-Sheng ; Li, Jian-Yu
Author_Institution :
Dept. of Electr. Eng., Nat. Sun Yat-Sen Univ., Kaohsiung
Abstract :
This research presents a high-efficiency linear radio frequency transmitter applying the envelope-following technique to a switching-mode power amplifier. The use of predistorted envelope and quadrature-modulated signals can linearize the nonlinear behavior with fairly high average efficiency. The experimental results show that the proposed transmitter can deliver a 1.9-GHz CDMA2000 1times signal with high adjacent channel power ratio, low error vector magnitude, and high power added efficiency over a wide range of modulated output power
Keywords :
power amplifiers; radio transmitters; 1.9 GHz; CDMA20001; channel power ratio; envelope-following technique; error vector magnitude; linear radiofrequency transmitters; power added efficiency; predistorted envelope; quadrature-modulated signals; switching-mode power amplifier; Amplitude modulation; Communication switching; Delta modulation; High power amplifiers; Power amplifiers; Pulse width modulation; Radio frequency; Radio transmitters; Radiofrequency amplifiers; Voltage; Envelope following; linear radio frequency (RF) transmitter; switching-mode power amplifier;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2006.879471
