Abstract
An electronically tunable reflection polarizer which exploits the dielectric anisotropy of nematic liquid crystals (LC) has been designed, fabricated and measured in a frequency band centered at 130 GHz. The phase agile polarizing mirror converts an incident slant 45 degrees signal upon reflection to right hand circular (RHCP), orthogonal linear (-45 degrees) or left hand circular (LHCP) polarization depending on the value of the voltage biasing the LC mixture. In the experimental set-up this is achieved by applying a low frequency bias voltage of 0 V, 40 V and 89 V respectively, across the cavity containing the LC material.
Original language | English |
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Pages (from-to) | 2302-2307 |
Number of pages | 7 |
Journal | IEEE Transactions on Antennas and Propagation |
Volume | 62 |
Issue number | 4 |
DOIs | |
Publication status | Published - Apr 2014 |
Keywords
- Earth observation
- imaging
- interferometry
- liquid crystals
- mm-wave
- polarimetric systems
- polarizer
- remote sensing
- space communications
- submm-wave
- tunable
- FREQUENCY-SELECTIVE SURFACE
- MILLIMETER
- ANTENNA
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George Goussetis
- School of Engineering & Physical Sciences - Professor
- School of Engineering & Physical Sciences, Institute of Sensors, Signals & Systems - Professor
Person: Academic (Research & Teaching)