جبران‌سازی اثرات اختلال سطح آنتن بازتابنده با استفاده از بازتابنده فرعی شکل داده شده

نویسندگان

1 دانشگاه صنعتی امیرکبیر

2 دانشگاه امیرکبیر

چکیده

ظاهرشدن اختلال بر سطح بازتابنده اصلی سبب تغییر الگوی تشعشعی در آنتن‌های بازتابنده شده و ویژگی‌های تشعشعی این آنتن را به خصوص در فرکانس‌های بالا تخریب می‌کند. روش‌های متفاوتی برای جبران‌سازی اثرات نامطلوب اختلال سطح بازتابنده اصلی وجود دارد. در این مقاله، نشان داده می‌شود که چگونه می‌توان با استفاده از شکل‌دهی سطح بازتابنده فرعی اقدام به جبران‌سازی این اثرات نمود. بر مبنای ریاضیات وردِشی می‌توان الگوی تشعشعی آنتن بازتابنده را خطی سازی و به‌صورت ماتریسی بازنویسی کرد. با استفاده از روش تفکیک مقادیر ویژه می‌توان اقدام به حل مسئله‌ معکوس نموده و نشان داده می‌شود که برای یک ساختار دوبازتابنده‌ای، روش ارائه شده با دقت مناسبی قادر به طراحی بازتابنده فرعی مطلوب است. نتایج به‌دست آمده نشان می‌دهد که اگر دامنه‌ اختلال سطح بازتابنده اصلی کمتر از یک‌چهارم طول ‌موج باشد، الگوریتم ارائه‌شده با دقت و سرعت قادر به طراحی بازتابنده فرعی مورد نظر است.

کلیدواژه‌ها

عنوان مقاله [English]

Compensating the effects of reflector antenna surface disturbance using shaped sub-reflector

نویسندگان [English]

  • Seyed Abolfazl Haddadi 1
  • Ayaz Ghorbani 2
1
2

کلیدواژه‌ها [English]

  • Reflector Antenna
  • Physical Optics Method
  • Surface Distortions
  • Compensation
  • Shaped Sub-Reflector

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رادار
دوره 5، شماره 1 - شماره پیاپی 1
755
اردیبهشت 1396
صفحه 1-14

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سابقه مقاله

  • تاریخ دریافت: 02 آبان 1395
  • تاریخ بازنگری: 03 اسفند 1401
  • تاریخ پذیرش: 28 شهریور 1397
  • تاریخ انتشار: 01 اردیبهشت 1396

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