A 3.3V operation single HBT power amplifier MMIC for 2.4GHz/5GHz dual-band WLAN applications

A 3.3 V operation single InGaP/GaAs HBT power amplifier MMIC (monolithic microwave integrated circuit) was developed for 2.4 GHz/5 GHz dual-band WLAN (wireless local area network) applications. The fabricated MMIC was as small as 1070 /spl times/ 1000 /spl mu/m/sup 2/ including input matching circuit, interstage matching circuit, and bias circuit with band selection function. The highly linear and efficient amplifier exhibits a P1dB (1dB gain compression output power) of 27 (27.2/27) dBm with a PAE (power added efficiency) of 42 (31.2/31) % at 2.45 (5.2/5.3) GHz. The linear output power for the EVM (error vector magnitude) of 5% using a 54 Mbit/s 64 QAM (quadrature amplitude modulation) OFDM (orthogonal frequency division multiplexing) signal was 22 (21.2/21) dBm with the PAE of 23.5 (16.5/16.5) % at 2.45 (5.2/5.3) GHz.

[1]  W. Foley,et al.  CMOS components for 802.11b wireless LAN applications , 2002, 2002 IEEE Radio Frequency Integrated Circuits (RFIC) Symposium. Digest of Papers (Cat. No.02CH37280).

[2]  B. McFarland,et al.  A 2.4 & 5 GHz dual band 802.11 WLAN supporting data rates to 108 Mb/s , 2002, 24th Annual Technical Digest Gallium Arsenide Integrated Circuit (GaAs IC) Symposiu.

[3]  N. Takahashi,et al.  A 5 GHz high efficiency and low distortion InGaP/GaAs HBT power amplifier MMIC , 2003, IEEE MTT-S International Microwave Symposium Digest, 2003.

[4]  Nj Piscataway,et al.  Wireless LAN medium access control (MAC) and physical layer (PHY) specifications , 1996 .

[5]  C.S. Park,et al.  A low quiescent current 3.3V operation linear MMIC power amplifier for 5 GHz WLAN applications , 2003, IEEE MTT-S International Microwave Symposium Digest, 2003.

[6]  Chul Soon Park,et al.  PCS/W-CDMA dual-band MMIC power amplifier with a newly proposed linearizing bias circuit , 2002, IEEE J. Solid State Circuits.