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
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
Language:eng ; jpn
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.
DOI:10.1109/EMICC.2007.4412730