Liquid crystal based Rotman lens antenna with switchable monopulse patterns. Issue 11 (26th August 2013)

• Record Type: Journal Article
• Authors: Christie, Steven; Cahill, Robert; Mitchell, Neil; Munro, Yvonne; Manabe, Atsutaka
• Is Part Of: Microwave and optical technology letters. Volume 55:Issue 11(2013:Nov.)
• Page Start: 2721
• Page End: 2726
• Publication Date: 2013-08-26
• Subjects: Microwaves -- Periodicals; Optics -- Periodicals; 621
• DOI: 10.1002/mop.27919
• Languages: English
• ISSNs: 0895-2477

Abstract

<abstract abstract-type="main"> <title>ABSTRACT</title> <p>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</p> </abstract>