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ساختار تار عنکبوتی بهعنوان سطوح امپدانس بالا | ||
| مدل سازی در مهندسی | ||
| مقاله 6، دوره 12، شماره 38، آذر 1393، صفحه 75-82 اصل مقاله (1014.35 K) | ||
| شناسه دیجیتال (DOI): 10.22075/jme.2017.1680 | ||
| نویسندگان | ||
| محمد جهاندار لاشکی؛ پژمان رضائی* ؛ محمدمهدی فخاریان | ||
| دانشگاه سمنان | ||
| تاریخ دریافت: 09 بهمن 1395، تاریخ بازنگری: 27 شهریور 1396، تاریخ پذیرش: 09 بهمن 1395 | ||
| چکیده | ||
| دراین مقاله با توجه به اهمیت ساختار سطوح امپدانس بالا (HIS) به عنوان هادی مغناطیسی مصنوعی (AMC)، ساختارهای جدیدی به عنوان سلول واحد با الهام از طبیعت و تارهای عنکبوت ارائه شده است. برای مقایسه عملکرد، ساختار متداول قارچیشکل (sievenpiper mushroom) با و بدون خط اتصال به زمین (via) نیز (با ابعاد یکسان) طراحی و نتایج آن با ساختارهای پیشنهادی، مقایسه شده است. در ابتدا چندین ساختار رشتهای با قابلیت جابجایی فرکانس فاز صفر طراحی شده است. اهداف طراحی، کاهش فرکانس فاز صفر با داشتن پهنایباند قابل قبول و نیز جابجایی فرکانسی فاز صفر با تغییر ضخامت تارها است. طراحی در محدودهی فرکانسی 2 تا 3 گیگاهرتز و با نرمافزار HFSS صورت گرفته است. | ||
| کلیدواژهها | ||
| تار عنکبوتی؛ جابجایی فرکانسی؛ سطوح امپدانس بالا؛ هادی مغناطیسی مصنوعی | ||
| عنوان مقاله [English] | ||
| Spider web structure as high impedance surfaces | ||
| نویسندگان [English] | ||
| Mohammad Jahandar Lashaki؛ Pejman Rezaei؛ MohammadMehdi Fakharian | ||
| چکیده [English] | ||
| In this paper, due to the importance of High Impedance Surfaces (HIS) as artificial magnetic conductor (AMC), new structures as unit cells has been introduced from nature and spider webs. For performance comparison, first two known structures of HIS, sievenpiper mushroom without via and with via designed with the same dimensions and the results are compared with the proposed structures. At first a number of string structures with the shift frequency of zero phase ability are designed. Design purposes are to reduce the frequency of zero phases with acceptable bandwidth and also zero phase frequency shift by changing the thickness of the webs. Design in 2 to 3 GHz frequency band and has been done by HFSS software. | ||
| کلیدواژهها [English] | ||
| Artificial Magnetic Conductor (AMC), Frequency shift, High Impedance Surfaces (HIS), Spider Web | ||
| مراجع | ||
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[1] Veselago, V. (1968). “The electrodynamics of substances with simultaneously negative values of permittivity and permeability,” Soviet Physics USPEKHI, Vol. 10, p. 509.
[2] Pendry, J. B. (2000). Negative refraction makes a perfect lens, Phys. Rev. Lett, Vol. 85, No. 18, pp. 3966–3969.
[3] Smith, D., Padilla, W., Vier, D., Nemat-Nasser, S., and Schultz, S. (2000). Composite medium with simultaneously negative permeability and permittivity, Phys. Rev. Lett., Vol. 84, No. 18, pp. 4184–4187.
[4] Mosallaei, H., and Rahmat-Samii, Y. (2001). “Composite materials with negative permittivity and permeability properties: Concept, analysis, and characterization,” IEEE AP-S Symp. Dig., Vol. 4, pp. 378–381.
[5] Yang, F., and Rahmat-Samii, Y., (2008). “Electromagnetic Band-gap Structures in Antenna Engineering,” Cambridge University Press, Cambridge, UK.
[6] Yang, F., Ma, K., Qian, Y., and Itoh, T. (1999). “A uniplanar compact photonic- bandgap (UC-PBG) structure and its applications for microwave circuits,” IEEE Trans. Microwave Theory Tech., Vol. 47, No. 8, pp. 1509–1514.
[7] Yang, F., Ma, K., Qian, Y., and Itoh, T. (1999). “A novel TEM waveguide using uniplanar compact photonic- bandgap (UC-PBG) structure,” IEEE Trans. Microwave Theory Tech., Vol. 47, No. 11, pp. 2092–2098.
[8] Coccioli, R., Yang, F., Ma, K., and Itoh, T. (1999). “Aperture-coupled patch antenna on UC-PBG substrate,” IEEE Trans. Microwave Theory Tech., Vol. 47, No. 11, pp. 2123–2130.
[9] Sievenpiper, D., Zhang, L., Broas, R., Alexopolous, N., and Yablonovitch, E. (1999). High-impedance frequency selective surfaces with a forbidden frequency band, IEEE Trans. Microwave Theory Tech., Vol. 47, No. 11, pp. 2059–2074.
[10] Sievenpiper, D. (1999). “High-impedance electromagnetic surfaces,” Ph.D. dissertation, Dept. Elect. Eng., Univ. California at Los Angeles, Los Angeles, CA.
[11] Arghand Lafmajani, I., Rezaei, P. (2012). A Novel Frequency-Selective Metamaterial to Improve Helix Antenna, Journal of Zhejiang University Science C, Vol. 13, No. 5, pp. 365-375.
[12] Arghand Lafmajani, I., Rezaei, P. (2011). “Miniaturized Rectangular Patch Antenna Loaded with Spiral/Wires Metamaterial,” European Journal of Scientific Research, Vol. 65, No. 1, pp. 121-130.
[13] Fakharian, M. M., and Rezaei, P. (2012). Parametric Study of UC-PBG Structure in Terms of Simultaneous AMC and EBG Properties and its Applications in Proximity-coupled Fractal Patch Antenna, IJE TRANSACTIONS A: Basics Vol. 25, No. 4, 347-354.
[14] Fakharian, M. M., and Rezaei, P. (2012). Numerical Analysis of Mushroom-Like and Uniplanar EBG Structures Utilizing Spin Sprayed Ni (–Zn)–Co Ferrite Films for Planar Antenna, European Journal of Scientific Research, Vol. 73 No. 1, pp. 41-51.
[15] Kern, J., and Werner, H. (2005). The Design Synthesis of Multiband Artificial Magnetic Conductors Using High Impedance Frequency Selective Surfaces, IEEE Trans. Antenna and Propagation, Vol. 53, No. 1, pp. 8-17.
[16] Bellion A., and Cable, M. (2012). “A New Wideband and Compact High Impedance Surface” IEEE International Sym on Antenna Technology and Applied Electromagnetics, pp. 1-5.
[17] Rezaei Abkenar, M., and Rezaei, P. (2010). “Design of a Compact Slot-Loaded EBG Surface and its application in a Low-Profile Antenna,” Fourth International Congress on Advanced Electromagnetic Materials in Microwaves and Optics, Karlsruhe, Germany, pp. 800-802.
[18] Li, Y., Fan, M., Chen, F., She, J., and Feng, Z., (2005). “A novel compact electromagnetic-bandgap (EBG) structure and its applications for microwave circuits,” IEEE Transaction on Microwave Theory and Techniques, Vol. 53, pp. 183-190.
[19] Zheng, Q. R., Lin, B. Q., Fu, Y. Q. and Yuan, N. C., (2007). “Characteristics and applications of a novel compact spiral electromagnetic band-gap (EBG) structure,” Journal of Electromagnetic Waves and Applications, Vol. 21, No. 2, pp. 199-213.
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