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Electronic Beam Steering and Polarization Agile Planar by Onur Hamza Karabey

24 February 2017 adminMicrowaves

By Onur Hamza Karabey

This e-book describes the characterization of liquid crystal fabrics at microwave frequencies and using those fabrics in reconfigurable planar antennas and of their electric tunable parts. It studies for the 1st time the belief of a two-dimensional digital beam guidance antenna and polarization agile planar antennas with lcd know-how. It supplies an in depth description of all of the theoretical analyses, modeling and layout equipment that have been interested by the belief of those units in addition to their validation utilizing size of demonstrative prototypes. This ebook additionally indicates that low profile, competitively priced, excessive achieve, digital beam steerage and polarization agile antennas might be fabricated in greater sizes through the use of present automatic lcd production recommendations. The leading edge principles and procedure defined during this paintings characterize a substantial development within the box of electronically reconfigurable antennas in line with liquid crystal expertise and are anticipated to attract major curiosity sooner or later. Such antennas may well turn into very important, for instance, in cellular terminals built-in into the physique of laptops (in the canopy) or of vehicles (in the rooftop), ships or boats, for which flat, low-profile and inexpensive antennas are required.

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Additional info for Electronic Beam Steering and Polarization Agile Planar Antennas in Liquid Crystal Technology

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Pdf [SCHc] SCHOTT. pdf [SCHd] SCHOTT. pdf [Sei+01] W. Seifert, M. Ueltzen, C. Strumpel, W. Heiliger, E. Muller, One-dimensional modeling of a peltier element, in Proceedings of XX International Conference on Thermoelectrics ICT 2001, pp. E. Sernelius, Electrodynamics, TFYY67, NFYD70. B. Weir, Automatic measurement of complex dielectric constant and permeability at microwave frequencies. Proc. Y. F. Audeh, Cutoff frequencies of eccentric waveguides. IEEE Trans. Microw. TheoryTech. 14(10), 487–493 (1966) Chapter 4 2D Electronic Beam Steering Phased Array Phased arrays are one of the well-known types of beam steering antennas.

T. Wu, Fundamentals of Liquid Crystal Devices (Wiley, Chichester, 2006) [Goe09] F. Goelden, Liquid Crystal Based Microwave Components with Fast Response Times: Material, Technology, Power Handling Capability, PhD thesis, Technische Universitaet Darmstadt, 2009. G. de Genne, J. J. Collings, M. M. G. Chigrinov, in Electrooptic Effects in Liquid Crystal Materials (Partially Ordered Systems), ed. by L. Lam, D. Langevin (Springer, New York, 1994). [Mue07] S. Mueller, Grundlegende Untersuchungen steuerbarer passiver FlüssigkristallKomponenten für die Mikrowellentechnik, PhD thesis, Technische Universitaet Darmstadt, 2007.

Then, the inner conductor offsets are calculated for N number of eccentric coaxial lines. Each line is mapped onto the concentric one to calculate the resultant line impedance and the propagation constant. In the next step, N number of transmission matrixes are calculated and cascaded to obtain that of the bended line. These parameters are converted into the scattering parameters [Fri94], which are then used to extract the material parameters as described in Sect. 2. 01. 1 Broadband Microwave Characterization of Liquid Crystals 35 dmax .

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