طراحی یک رفلکتور چند باند و زاویه وسیع با استفاده از ساختارهای شکلی

نوع مقاله: مقالة‌ تحقیقی‌ (پژوهشی‌)

نویسندگان

1 دانشگاه صنعتی مالک اشتر

2 دانشگاه صنعتی مالک اشتر، دانشکده برق، تهران، لویزان، ایران

3 دانشگاه شیراز

چکیده

رفلکتورها ابزار بسیار مهمی در مقابله با سامانه‌های تصویربرداری SAR فضاپایه و هواپایه محسوب می-شوند. زیرا با توجه به سطح مقطع راداری بالای خود می‌توانند در قالب طرح های پدافندی فریب و استتار به کارگیری شوند. نکته قابل توجه دراین ماموریت، این است که رادار SAR قادراست از هر جهت، با هر زاویه‌ی فرودی و در هر باند فرکانسی موج را به سمت زمین بفرستد و از مناطق حساس تصویربرداری نماید.لذا طراحی یک رفلکتور همه جهتی، چند باند و زاویه و سیع از اهمیت بسیار بالایی برخوردار است. طراحی چنین رفلکتوری بسیار پیچیده است زیرا عملکرد رفلکتور به پارامترهای مختلفی چون ابعاد، شکل و جنس رفلکتور، فرکانس، زاویه فرود و پلاریزاسیون موج ارسالی رادار بستگی دارد. رفلکتورهای موجود عموما در یک جهت خاص، در یک فرکانس مشخص و در یک زاویه‌ی مشاهده محدود RCS بالایی دارند. در این مقاله تلاش می‌شود تا نحوه طراحی یک رفلکتور همه جهتی، چند باند و زاویه وسیع با استفاده از ساختار‌های شکلی ارائه شود.

کلیدواژه‌ها


عنوان مقاله [English]

Design of a Multiband and Wide Angle Reflector

نویسندگان [English]

  • Mojtaba Behzad Fallahpour 1
  • Hamid Dehghani 2
  • Ali Jabbar Rashidi 1
  • Abbas Sheikhi 3
1 Male Ashtar University of Technology
2 MaleAshtar University of Technology
3 Shiraz Uiversity
چکیده [English]

Reflectors are a very important tools in counteracting the space borne or airborne SAR imaging systems. Because they can be used in the form of decoy and camouflage protection designs due to their high level RCS. The remarkable thing on this mission is that the SAR radar is capable of sending the wave to earth in any direction, with any incident angle and in any frequency band, and capturing sensitive areas. The design of such an all-directional, multi-band reflector, and wide angles reflector is very complicated because the reflex function depends on various parameters such as the dimensions, shape and material of the reflector, the frequency, the incident angle, and the polarization of the radiated wave. Existing refractors generally have a high RCS in a particular direction at a specific frequency and at a narrow viewing angle. In this paper, we will attempt to design a refractor of all directions, multiple bands and wide angles using shape structures.

کلیدواژه‌ها [English]

  • "Space borne SAR"
  • "Reflector"
  • " Radar Cross Section"
  • "Multi Band"
  • " Wide Angle"
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