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Smart antenna performance degradation due to grating lobes in FDD systems

Research output: Working paperWorking paper and Preprints

  • RMM Hunukumbure
  • MA Beach
  • B Allen
  • PN Fletcher
  • Peter Karlsson
Original languageEnglish
Pages5 p
StatePublished - May 2001


It is shown here that even for a small increase in the inter-element distance from the nominal half wavelength value, grating lobes could occur in smart antenna radiation patterns. This has practical implications when smart antennas are employed in Frequency Division Duplex (FDD) systems. This paper discusses the impact on the UMTS Terrestrial Radio Access (UTRA) FDD system. The presence of grating lobes is verified and the resultant performance degradation in an interference limited cell is quantified, using simulation results derived from actual field trial measurements taken within the UTRA band

Additional information

Additional information: A paper presented to the 9th Management Committee and Working Group Meeting of COST 260 : Session 3: RF and Beam Forming Hardware and Technology, held in Gothenburg, May 2-5, 2001 Sponsorship: The authors wish to gratefully acknowledge the funding support under HEFCE JREI’98 which enabled the procurement of Medav channel sounder and Allgon systems AB, for providing the antenna array Contributor: European Cooperation in the Field of Scientific and Technical Research (EURO-COST)

    Research areas

  • Frequency Division Duplex (FDD), smart antennas, UMTS Terrestrial Radio Access (UTRA)

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