Evolution of Microwave Nematic Liquid Crystal Mixtures and Development of Continuously Tuneable Micro- and Millimetre Wave Components
作者： M. Jost , A. Gaebler , C. Weickhmann , S. Strunck , W. Hu
DOI: 10.1080/15421406.2015.1025645
关键词: Optics 、 Figure of merit 、 Phase (waves) 、 Waveguide (electromagnetism) 、 Liquid crystal 、 Phase shift module 、 Materials science 、 Transmission loss 、 Microwave 、 Terahertz radiation
摘要: This work represents the evolution of micro- and millimetre wave optimized nematic liquid crystal mixtures their applications. Starting with well-known mixture K15 used in display technology, microwave LC have been developed. For that, novel characterization setups developed, which play an essential factor optimization process for micro-, THz regime. By using a specialized simulation tool, different tuneable waveguide topologies are compared terms tuneability, transmission loss tuning speed. Based on phase shifter W-band frequencies has fabricated, reached measured figure merit passive shifters up to 148° /dB.
tu-darmstadt.de
sci-hub.se 参考文章(17)
Onur Hamza Karabey, Alexander Gaebler, Sebastian Strunck, Rolf Jakoby, A 2-D Electronically Steered Phased-Array Antenna With 2 $\,\times\,$ 2 Elements in LC Display Technology IEEE Transactions on Microwave Theory and Techniques. ,vol. 60, pp. 1297- 1306 ,(2012) , 10.1109/TMTT.2012.2187919
Iain W. Stewart, The Static and Dynamic Continuum Theory of Liquid Crystals: A Mathematical Introduction ,(2001)
I.W. Stewart, The static and dynamic continuum theory of liquid crystals Taylor and Francis. ,(2004)
Shihe Li, C. Akyel, R.G. Bosisio, Precise Calculations and Measurements on the Complex Dielectric Constant of Lossy Materials Using TM/sub 010/ Cavity Perturbation Techniques IEEE Transactions on Microwave Theory and Techniques. ,vol. 29, pp. 1041- 1048 ,(1981) , 10.1109/TMTT.1981.1130496
M. Jost, C. Weickhmann, S. Strunck, A. Gäbler, C. Fritzsch, O.H. Karabey, R. Jakoby, Liquid crystal based low-loss phase shifter for W-band frequencies Electronics Letters. ,vol. 49, pp. 1460- 1462 ,(2013) , 10.1049/EL.2013.2830
Pochi Yeh, Optics of liquid crystal displays ,(1999)
S. Strunck, O.H. Karabey, A. Gaebler, R. Jakoby, Reconfigurable waveguide polariser based on liquid crystal for continuous tuning of linear polarisation Electronics Letters. ,vol. 48, pp. 441- 443 ,(2012) , 10.1049/EL.2012.0259
R. P. Brent, An algorithm with guaranteed convergence for finding a zero of a function The Computer Journal. ,vol. 14, pp. 422- 425 ,(1971) , 10.1093/COMJNL/14.4.422
Onur Hamza Karabey, Saygin Bildik, Sara Bausch, Sebastian Strunck, Alexander Gaebler, Rolf Jakoby, Continuously Polarization Agile Antenna by Using Liquid Crystal-Based Tunable Variable Delay Lines IEEE Transactions on Antennas and Propagation. ,vol. 61, pp. 70- 76 ,(2013) , 10.1109/TAP.2012.2213232
D. Dolfi, M. Labeyrie, P. Joffre, J.P. Huignard, Liquid crystal microwave phase shifter Electronics Letters. ,vol. 29, pp. 926- 928 ,(1993) , 10.1049/EL:19930618