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- Title
MMIC PAM applied with pre-distorter having independent operation of nonlinear signal.
- Authors
Inn-Yeal Oh; Ki-Byoung Kim; Keuk-Hwan Ra; Chul-Soon Park
- Abstract
A dynamic pre-distorter with two paths to set nonlinear signal level and phase encourages power amplifier module (PAM) for wireless broadband (Wibro) service to enhance linearity. We proposed a linearizer having a new IM generator, which is made up of the InGaP/GaAs HBT operated at saturation region of a common collector circuit. The targeted Wibro PAM is designed using InGaP/GaAs HBT technology, and the pre-distorter, drive and power amplifier are fully integrated in single chip within 960 × 2400 μm. Even though PAM is designed to have just a 5-dB back-off, PAM is compatible with linearity standards up to maximum output power 21 dBm, and has a 17.5% efficiency by having a low leakage and improving spurious of 6 dB in the 64QAM form based on IEEE802.16e-2005 standards. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 851–855, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23235
- Subjects
POWER amplifiers; BROADBAND communication systems; WIRELESS communications; BANDWIDTHS; ELECTRONIC amplifiers
- Publication
Microwave & Optical Technology Letters, 2008, Vol 50, Issue 4, p851
- ISSN
0895-2477
- Publication type
Article
- DOI
10.1002/mop.23235