Low-Cost Wide-Range Low-Current ConsumptionudLinear HBT MMIC Power Amplifier for Portableud2.4GHz WLAN Applications

摘要

A low-cost, low-current consumption 2.4-ud2.5GHz MMIC power amplifier operating at 3.3V singleudsupply has been developed for high data rate, wide-rangeudportable WLAN applications. The MMIC utilizes audFairchild-proprietary InGaP HBT process that enables theuddesign of high power density and extremely linear circuitsudat frequencies exceeding 6GHz. The MMIC design has beenudconstructed based on accurate HBT and passives models,udfocusing on performance optimization for low AM-AM andudAM-PM distortion, low current consumption and minimaludharmonic levels. For an OFDM modulated signal at 54Mbpsuddata rate, the PA delivers +23.6 dBm linear output at audcorresponding Error Vector Magnitude (EVM) of 4.4%(-27dB), while consuming an average packet current of lessudthat 315mA. The MMIC is fully matched in a cost-effectiveud3x3mm QFN package, requiring only a small number ofudexternal passive components for efficient board layout andudlow total cost.