روش های کاهش سطح مقطع راداری برای آنتن های ریزنواری

نوع مقاله : مقاله پژوهشی

نویسنده

دانشکده مهندسی برق- دانشگاه هوایی شهید ستاری، تهران، ایران

چکیده

فناوری نهان­سازی یکی از روش­های مهم در محفوظ ماندن جنگنده­ها و کشتی­های نظامی در سرزمین دشمن به شمار می­رود. یکی از روش‌های  فناوری نهان­سازی، کاهش سطح مقطع راداری (RCS) آنتن­های مورد استفاده در رادارهای این جنگنده­ها و کشتی­ها می­باشد. در این تحقیق، به روش­های کاهش سطح مقطع راداری برای آنتن­های ریزنواری و تاثیر این روش­ها روی عملکرد آن­ها پرداخته شده است. در ابتدا به تعریف و روابط حاکم بر سطح مقطع راداری و اهمیت کاهش آن پرداخته شده است. سپس شش روش اصلی کاهش سطح مقطع راداری برای آنتن­های ریزنواری در این گزارش آورده شده است. این شش روش عبارت­اند از: شکل‌دهی آنتن، شکاف باند الکترونیکی (EBG)، تشدیدگرهای حلقوی شکاف‌دار مکمل (CSRR)، صفحه زمین با سطوح انتخابگر فرکانسی (FSS)، ساختار فراموادی جاذب (MMA)، تشدیدگرهای ریزنواری. در هر بخش به مقایسه نمودار سطح مقطع راداری (RCS) آنتن­های مرجع و آنتن­های تغییر یافته برای کاهش RCS پرداخته شده است. مزایا و معایب هر‌ یک از این روش­ها در بخش­های مربوطه بیان شده است.

کلیدواژه‌ها


عنوان مقاله [English]

Radar Cross Section Reduction Methods for Microstrip Antennas

نویسنده [English]

  • M. Mohammadi
Department of Electrical Engineering, Aeronautical University, Tehran, Iran
چکیده [English]

The stealth technology is one of the most important strategies for protecting fighters and warships in the enemy's territory. Reducing the radar cross-section (RCS) of the antennas used in the radar of these fighters and ships is one of the stealth technology techniques. In this research, the methods of the radar cross section reduction for the microstrip antennas and their effects on performance of the antennas are presented. First, the radar cross section definition and the related governing relationships are presented and the importance of RCS reduction is discussed. Then, six main methods of radar cross-section reduction for microstrip antennas are introduced. These methods are: antenna shaping, electronic band gap (EBG), complementary split ring resonators (CSRRs), ground plane with frequency selective surface (FSS), metamaterial absorbers (MMA), and microstrip resonators. In each section, the radar cross section (RCS) of the reference and modified antennas are compared and the advantages and disadvantages of the relevant method is outlined.
 

کلیدواژه‌ها [English]

  • Radar cross section
  • microstrip antenna
  • electronic band gap
  • frequency selective surface
  • metamaterial
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