Tri-band CMOS Class-E power amplifier design with phase compensations for polar systems

A 0.18mm CMOS fully integrated cascode Class-E power amplifier operating in 2.5GHz/3.5GHz/5.2GHz frequency bands for polar transmitters has been proposed. The tri-band amplification is achieved by adaptation of the common-gate transistor size and the matching networks. The phase distortion from supply modulation of the Class-E is compensated by controlling the common-gate transistor gate voltage and a compensative capacitor. Simulation results show that the maximum power-added efficiency (PAE) of 30.4%, drain efficiency of 34% and output power of 18.8dBm from 2.8V supply can be achieved. The phase distortion can be compensated from 34.4° to 3.1° under supply voltage of 0.5V to 2.8V. A system co-simulation has been established for relative constellation error (RCE) evaluation and it reveals that the RCE can be improved from −23.3dB to −31.4dB in 3.5GHz frequency band.

[1]  R. Pullela,et al.  Quad-band GSM/GPRS/EDGE polar loop transmitter , 2004, IEEE Journal of Solid-State Circuits.

[2]  G. Baudoin,et al.  EER architecture specifications for OFDM transmitter using a class E amplifier , 2004, IEEE Microwave and Wireless Components Letters.

[3]  P.J. Nagle,et al.  A wideband linear amplitude modulator for polar transmitters based on the concept of interleaving delta modulation , 2002, 2002 IEEE International Solid-State Circuits Conference. Digest of Technical Papers (Cat. No.02CH37315).

[4]  E. McCune.  Advanced architectures for high-efficiency multi-mode, multi-band terminal power amplifiers , 2004, Proceedings. 2004 IEEE Radio and Wireless Conference (IEEE Cat. No.04TH8746).

[5]  G. Brenna,et al.  A 2-GHz carrier leakage calibrated direct-conversion WCDMA transmitter in 0.13-/spl mu/m CMOS , 2004, IEEE Journal of Solid-State Circuits.

[6]  P. Reynaert,et al.  A 1.75-GHz polar modulated CMOS RF power amplifier for GSM-EDGE , 2005, IEEE Journal of Solid-State Circuits.

[7]  T. Sowlati,et al.  Quad-band GSM/GPRS/EDGE polar loop transmitter , 2004, 2004 IEEE International Solid-State Circuits Conference (IEEE Cat. No.04CH37519).

[8]  Mustafa Ozen.  Class-E Power Amplifiers for Pulsed Transmitters , 2012 .