Microwave liquid-crystal variable phase grating
Yang, Fuzi; Sambles, J. Roy
Date: 17 September 2004
Article
Journal
Applied Physics Letters
Publisher
American Institute of Physics
Publisher DOI
Abstract
A voltage-controlled variable phase grating, at microwave frequencies, is described and its response characterized. It comprises a stack of 71 aluminium strips of 1 mm thickness separated by 75 µm spaces, filled with aligned nematic liquid crystal. For microwaves polarized normal to the grating strips there are a set of resonant ...
A voltage-controlled variable phase grating, at microwave frequencies, is described and its response characterized. It comprises a stack of 71 aluminium strips of 1 mm thickness separated by 75 µm spaces, filled with aligned nematic liquid crystal. For microwaves polarized normal to the grating strips there are a set of resonant transmitted frequencies. By varying the voltages applied across the liquid crystal layers and their distribution, a variable phase microwave grating is realized. This allows low-voltage control of output beam profile and intensity.
Physics and Astronomy
Faculty of Environment, Science and Economy
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