• DocumentCode
    762983
  • Title

    Linearized mixer using predistortion technique

  • Author

    Kim, Youngwook ; Kim, Youngsik ; Lee, Soonghak

  • Author_Institution
    Seoul Nat. Univ., South Korea
  • Volume
    12
  • Issue
    6
  • fYear
    2002
  • fDate
    6/1/2002 12:00:00 AM
  • Firstpage
    204
  • Lastpage
    205
  • Abstract
    A predistortion technique has been proposed to reduce intermodulation distortion (IMD) generated from the conversion process of a mixer. In this technique, the IMD generated from a mixer in the IF band was cancelled by the controlled RF error signal, which is generated by a predistorter. The magnitude and phase of the RF error signal were properly adjusted through a vector modulator. This linearization technique has been verified by experiment of a down conversion mixer in the cellular band. A two tone test has been performed at the frequency of 836 MHz with 442 kHz separation. The results show that this method improves about 16 dB of IMD3 at -18 dBm IF output power in 10 MHz frequency band and increases about 3.5 dB of P1 dB of the mixer. Simple topology and good performance in linearization of IF signals renders this technique suitable for highly linear frequency conversion in communication systems.
  • Keywords
    UHF mixers; intermodulation distortion; linearisation techniques; 836 MHz; IM3; IMD reduction; communication systems; controlled RF error signal; highly linear frequency conversion; intermodulation distortion; linearization technique; linearized mixer; predistortion technique; two tone test; vector modulator; Error correction; Intermodulation distortion; Linearization techniques; Mixers; Phase modulation; Predistortion; RF signals; Radio frequency; Signal generators; Testing;
  • fLanguage
    English
  • Journal_Title
    Microwave and Wireless Components Letters, IEEE
  • Publisher
    ieee
  • ISSN
    1531-1309
  • Type

    jour

  • DOI
    10.1109/LMWC.2002.1009995
  • Filename
    1009995