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A. Attoui, A. Boualleg, S. Redadaa
«New Microstrip Resonator of Nanostructured Materials in a Liquid-Crystal-Based Phase Shifter»
389–399 (2017)

PACS numbers: 07.60.-j, 07.85.-m, 42.70.Df, 42.79.-e, 81.07.Oj, 84.40.Ba, 85.85.+j

Nanostructured materials (NsM) are materials with a microstructure, the characteristic length scale of which is of the order of magnitude a few (typically 1–100) nanometres. A nanostructure is a structure of an intermediate size between the microscopic structures and the molecular ones. In this article, we study the properties of 6 nm liquid crystal (LC)–NsM system that forms highly stable solutions in the nematic liquid crystal 4-cyano-4-n-pentylbiphenyl (5CB). The nanostructure is covalently functionalized with 4-sulfanylphenyl-4-[4 (octyloxy) phenyl] benzoate (SOPB), which resembles the structure of the 5CB molecules. The use of LCs as an NsM with phased array antennas is for steering the beam pattern electronically with high effectiveness, managing to get minimum side-lobe levels and narrow beam widths. Normally, phase shifters are the devices in a phased array antenna that allows the radiated beam to be steered in the direction. The objective of this work is to investigate a phase shifter in a linear antenna array for angle scan. A microstrip antenna array is used since it is simple to be designed and fabricated. Ansoft Designer Software is used to simulate the phase shifter for applications to antenna array with LC directed synthesis of NsM. In our paper, we present a new external command with a new influence of the static magnetic bias field of liquid crystal for shifted radiation pattern.

Key words: nanostructured material, liquid crystal, phased array, phase shifter, microstrip antenna.

https://doi.org/10.15407/nnn.15.03.0389

REFERENCES

1. A. Attoui and A. Boualleg, Metallurgical and Mining Industry, 7: 134 (2015).
2. S. Missaoui, A. Gharbi, and M. Kaddour, Journal of Chemical Engineering and Materials Science, 2, No. 7: 96 (2011).
3. H. Gleiter, Acta Metallurgica, 48, Iss. 1: 1 (2000).
https://doi.org/10.1016/S1359-6454(99)00285-2
4. S. Mueller, C. Felber, P. Scheele, M. Wittek, C. Hock, and R. Jakoby, European Microwave Conference (2005), vol. 1, p. 1.
5. F. A. Tahir and H. Aubert, Progress in Electromagnetics Research, 144: 1 (2010).
https://doi.org/10.2528/PIER09112506
6. V. A. Tolmachev, V. A. Melnikov, A. V. Baldycheva, K. Berwick, and T. S. Perova, Progress in Electromagnetics Research, 122: 293 (2012).
https://doi.org/10.2528/PIER11091506
7. Y. T. Kim, Journal of the Korean Physical Society, 49, No. 3: 1143 (2006).
8. B. A. Belyaev, A. A. Leksikov, A. M. Serzhantov, and V. F. Shabanov, Technical Physics Letters, 34, No. 6: 463 (2008).
https://doi.org/10.1134/S1063785008060047
9. Z. Du, V. Viikari, J. A. Laurinaho, A. Tamminen, and A. V. Raeais Aeanen, Progress in Electromagnetics Research, 148: 15 (2014).
https://doi.org/10.2528/PIER14050902
10. F. Sahbani, N. Lemcel Tentillier, A. Gharsallah, and A. Gharbi, IEEE 3rd International Design and Test Workshop-IDT 2008 (2008), No. 978-1-4244-3477-0/08/25.00, p. 78.
11. P. Anand, S. Sharma, D. Sood, and C. C. Tripathi, 1st International Conference ET2ECN-2012 (2012), vols. 1-3, No. 978-1-4673-1627-9/12/31.00, p. 8.