PAE Improvement of PCS MMIC Power Amplifier with a Bias Control Circuit

Ji Hoon KIM  Joon Hyung KIM  Youn Sub NOH  Song Gang KIM  Chul Soon PARK  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E86-C   No.4   pp.672-675
Publication Date: 2003/04/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Microwaves, Millimeter-Waves
Keyword: 
power amplifier,  bias control circuit,  personal communications services (PCS),  heterojunction bipolar transistor (HBT),  

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Summary: 
A high efficient HBT MMIC power amplifier with a new on-chip bias control circuit was proposed for PCS applications. By adjusting the quiescent current in accordance with the output power levels, the average power usage efficiency of the power amplifier is improved by a factor of 1.4. The bias controlled power amplifier, depending on low (high) output power levels, shows 62(103) mA of quiescent current, 16(28) dBm output power with 7.5(35.4)% of power-added efficiency(PAE), -46(-45) dBc of adjacent-channel power ratio (ACPR), and 23.7(26.9) dB of gain