Presentation	2000/1/21 A Linearized Heterojunction FET-Based Power Amplifier with High Efficiency over Wide Output Power Range for Wide-Band CDMA Handsets Gary HAU, Takeshi B. Nishimura, Naotaka Iwata,
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Abstract(in English)	A linearized power amplifier with high efficiency over wide output power range has been developed for 1.95 GHz wide-band CDMA handsets. An MMIC predistorter was incorporated into a heterojunction FET-based amplifier for improving the linearity and efficiency. Measured at an adjacent channel leakage power ratio (ACPR) of -40 dBc, the output power (P_) and power added efficiency (PAE) of the amplifier improve from 25.5 dBm and 54.4% to 26.2 dBm and 57.4% respectively after the use of predistorter under 3.5 V operation. With bias control, the linearized amplifier also shows an excellent low P_ (13 dBm) performance, achieving a PAE of 47.7% at the same ACPR level. The linearized amplifier achieves a PAE over 40% over an output power range of 21 dB, making it suitable for wide dynamic range W-CDMA handset application.
Keyword(in Japanese)	(See Japanese page)
Keyword(in English)	W-CDMA / power amplifier / heterojunction FET / linearization / low distortion / predistortion
Paper #	ED99-286,MW99-210,ICD99-261
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Conference Information
Committee	ICD
Conference Date	2000/1/21(1days)
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Paper Information
Registration To	Integrated Circuits and Devices (ICD)
Language	JPN
Title (in Japanese)	(See Japanese page)
Sub Title (in Japanese)	(See Japanese page)
Title (in English)	A Linearized Heterojunction FET-Based Power Amplifier with High Efficiency over Wide Output Power Range for Wide-Band CDMA Handsets
Sub Title (in English)
Keyword(1)	W-CDMA
Keyword(2)	power amplifier
Keyword(3)	heterojunction FET
Keyword(4)	linearization
Keyword(5)	low distortion
Keyword(6)	predistortion
1st Author's Name	Gary HAU
1st Author's Affiliation	Kansai Electronics Research Laboratories, NEC Corporation.()
2nd Author's Name	Takeshi B. Nishimura
2nd Author's Affiliation	Kansai Electronics Research Laboratories, NEC Corporation.
3rd Author's Name	Naotaka Iwata
3rd Author's Affiliation	Kansai Electronics Research Laboratories, NEC Corporation.
Date	2000/1/21
Paper #	ED99-286,MW99-210,ICD99-261
Volume (vol)	vol.99
Number (no)	561
Page	pp.pp.-
#Pages	6
Date of Issue