Liquid crystal based Rotman lens antenna with switchable monopulse patterns

Steven Christie*, Robert Cahill, Neil Mitchell, Yvonne Munro, Atsutaka Manabe

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


An electronically reconfigurable Rotman lens is described which generates multiple beams that can be switched from monopulse sum to difference radiation patterns when used in conjunction with a six element Vivaldi antenna array. This is achieved by exploiting the voltage-dependent dielectric anisotropy property of nematic state liquid crystals to provide switched 0 degrees and 180 degrees phase shifts in the array feed lines. The viability of the concept is demonstrated by designing an antenna which exhibits dynamically reconfigurable monopulse radiation patterns over the frequency band 6-10 GHz. Measured and simulated results are shown to be in good agreement.

Original languageEnglish
Pages (from-to)2721-2726
JournalMicrowave and Optical Technology Letters
Issue number11
Early online date26 Aug 2013
Publication statusPublished - Nov 2013


  • Rotman lens antenna
  • liquid crystal phase shifters
  • monopulse radar antennas
  • phased arrays


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