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1.
  • Isaksson, Magnus, 1969-, et al. (author)
  • Nonlinear Behavioral Modeling of Power Amplifiers Using Radial-Basis Function Neural Networks
  • 2005
  • In: 2005 IEEE MTT-S International Microwave Symposium Digest. - 0780388453 ; , s. 1967-1970
  • Conference paper (peer-reviewed)abstract
    • A radial-basis function neural network (RBFNN) is proposed for modeling the dynamic nonlinear behavior of RF power amplifiers. In the model the signal's envelope is used. The model requires less training than a model using both IQ-data. Sampled input and output signals from a power amplifier for 3G were used in the identification and validation. The RBFNN is compared with a parallel Hammerstein model. For a memory depth of one sample the RBFNN gives a better model, in- and out-of-band; for three samples the RBFNN reduces the in-band error more while the Hammerstein model reduces the error out-of-band more.
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2.
  • Sjöblom, Peter, et al. (author)
  • CMOS antenna tuning unit for 2.4 GHz ISM band
  • 2005
  • In: 2005 IEEE MTT-S International Microwave Symposium. - 0780388453 ; , s. 279-282
  • Conference paper (peer-reviewed)abstract
    • Antenna matching is improved with adaptive 0.35 μm CMOS circuits based on switched shunt capacitors arranged in capacitor banks and external series inductors. The simulated circuits are optimized for the ISM 2.4 GHz band. The circuits provide a VSWR ⩽ 2 match for every impedance with VSWR ⩽ 5. There is a 1 dB power loss for a perfect 50 Ω → 50 Ω transformation, a break-even point at VSWR = 1.5, and a 3dB increase in delivered power for VSWR = 4.3
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  • Result 1-2 of 2
Type of publication
conference paper (2)
Type of content
peer-reviewed (2)
Author/Editor
Rönnow, Daniel (1)
Sjöland, Henrik (1)
Sjöblom, Peter (1)
Wisell, David (1)
Isaksson, Magnus, 19 ... (1)
University
University of Gävle (1)
Lund University (1)
Language
English (2)
Research subject (UKÄ/SCB)
Engineering and Technology (2)
Year
2005 (2)

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