1. Liquid crystal based Rotman lens antenna with switchable monopulse patterns.
- Author
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Christie, Steven, Cahill, Robert, Mitchell, Neil, Munro, Yvonne, and Manabe, Atsutaka
- Subjects
LENS antennas ,LIQUID crystals ,ELECTRONIC pulse techniques ,ANTENNA radiation patterns ,ANISOTROPY ,ENERGY bands ,PHASE shifters - Abstract
ABSTRACT 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° and 180° 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. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2721-2726, 2013 [ABSTRACT FROM AUTHOR]
- Published
- 2013
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