A 3.3V broadband linear power amplifier module for IEEE 802.16e (Wimax) applications using e-mode pHEMT technology

This paper describes, for the first time, the design and realization of a linear power amplifier for the newly-ratified IEEE 802.16e WMAN (WiMax) applications using a proprietary 0.25 um enhancement-mode pHEMT (EpHEMT) technology. When tested using a 10 MHz bandwidth IEEE 802.16e signal with 64-QAM...

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Bibliographic Details
Published in2007 European Microwave Integrated Circuit Conference pp. 387 - 390
Main Authors Chow, Y.H., Yong, C.K., Lee, J., Lee, H.K., Thor, W.Y., Lee, K.Y., Tan, H.T., Liew, Y.Y., Khoo, S.H.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.10.2007
Subjects
Amplifier
Attenuators
Bandwidth
Broadband amplifiers
Detectors
Index terms
Linearity
MMIC
pHEMT
PHEMTs
Power amplifiers
Power generation
Testing
Voltage
WiMAX
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Summary:This paper describes, for the first time, the design and realization of a linear power amplifier for the newly-ratified IEEE 802.16e WMAN (WiMax) applications using a proprietary 0.25 um enhancement-mode pHEMT (EpHEMT) technology. When tested using a 10 MHz bandwidth IEEE 802.16e signal with 64-QAM modulation, the amplifier exhibits a linear power output of (22.5-23)dBm across the full (3.3-3.8)GHz band with less than 2.5% EVM on a single 3.3V supply while consuming 420 mA of total current. A 20dB bypass gain attenuator that is activated by a CMOS-compatible voltage pin is included on-chip. Output power detection is achieved by the use of an on-chip power detector and a bias shutdown voltage shuts down the complete amplifier . At 3.6V supply tuned to (3.3-3.6)GHz operation, the amplifier outputs 24 dBm of linear output power. The complete module is packaged in a molded chip-on-board (MCOB) 5 mm x 5 mm module.
ISBN:9782874870026
2874870021
DOI:10.1109/EMICC.2007.4412730