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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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