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Dual-band multi-mode power amplifier module using a third generation HBT technology

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23 Author(s)
Savary, P. ; Wireless & Broadband Syst. Group, Motorola Semicond. Products Sector, Tempe, AZ, USA ; Girardot, A. ; Montoriol, G. ; Dupis, F.
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A heterojunction bipolar transistor (HBT) technology utilizing InGaP/GaAs and carbon-doped base has been established in Motorola's high-volume 6" GaAs facility. The technology has been used to develop an integrated dual band (824-849 MHz and 1850-1910 MHz) power amplifier IC with multi-mode operation for 2.5G portable wireless. Both three-stage amplifiers have 30 dB gain, and provide an EDGE (8-PSK) signal at 28 dBm, an NADC signal at 30 dBm, and a GMSK signal at 32 dBm in their respective frequency bands, using a single 3.5 V source. All matching elements external to the chip are included in a low cost epoxy substrate which is 9/spl times/12/spl times/1.6 mm/sup 3/. Prospects of using this technology in W-CDMA applications have also been explored. A prototype achieves an ACPR of -41 dBc at 28 dBm output power with an efficiency of 36%.

Published in:

Gallium Arsenide Integrated Circuit (GaAs IC) Symposium, 2001. 23rd Annual Technical Digest

Date of Conference:

21-24 Oct. 2001

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