آنتن مونوپالس حفره پشتی با پچ چاپی مسطح و قطبش مورب 45 درجه، بهره و بازده بالا

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری، دانشگاه صنعتی مالک اشتر،تهران، ایران

2 دانشیار، دانشگاه صنعتی مالک اشتر،تهران، ایران

چکیده

در این مقاله، به طراحی و شبیه سازی گام به گام آنتن مونوپالس چند لایه جدید در باند فرکانسی Ku با مشخصاتی از قبیل بهره بالا، بازدهی بالا، سطح گلبرگ فرعی پایین و قطبش مورب پرداخته شده است. عنصر تعشعشی ریزنوار بوده و دارای تغذیه موجبری می‌باشد. بین شبکه تغذیه و پچ تشعشعی حفره فلزی قرار گرفته است که سبب کاهش تزویج بین عناصر تشعشعی در ساختار آرایه می شود. برای کاهش پیچیدگی شبکه تغذیه از طراحی زیر آرایه‌ای استفاده شده است که دارای مقسم توان حفره‌ای و شکاف‌های تغذیه در بین لایه‌های آن برای کاهش ارتفاع آنتن می‌باشد. مقسم توان 1 به 48 دو بعدی با توزیع چپی‌شفی طراحی شده است. آنتن شبیه‌سازی‌شده دارای پهنای باند 11 درصدی، بهره dB 38.4 ، سطح گلبرگ فرعی بهتر از dB 19 در هر دوصفحه، پهنای پرتو تقریبی 2.4 درجه در فرکانس مرکزی، بازده بالاتر از 86 درصد و عمق صفر بهتر از dB 38- را دارا می باشد. الگوی‌های تشعشعی مجموع و تفاضل دارای تقارن خوبی در هر دو صفحه اصلی می‌باشند. یک دوازدهم آنتن ساخته شده که نتایج اندازه‌گیری آن با شبیه‌سازی تطابق مناسبی دارد.

کلیدواژه‌ها

عنوان مقاله [English]

Cavity Backed Monopulse antenna with printed patch, 45° linear polarization, high gain and high efficiency

نویسندگان [English]

  • sayed mohammad hamidi 1
  • seyed mohammad javad razavi 2
  • Seyyed Hossein Mohseni Armaki 2
1 PhD student, Malik Ashtar University of Technology, Tehran, Iran
2 Associate Professor, Malik Ashtar University of Technology, Tehran, Iran
چکیده [English]

This article presents a comprehensive step-by-step design and simulation process for a new multilayer monopulse antenna operating in the Ku frequency band. The antenna is designed to exhibit high gain, high efficiency, low sidelobe levels, and 45° linear polarization. The radiating element employs a microstrip antenna with waveguide feeding. To mitigate coupling between the radiation elements in the array structure, a metal cavity is strategically placed between the feeding network and the radiation patch. Additionally, a sub-array is designed to simplify the feeding network, incorporating a cavity power divider and feeding slots between the layers to reduce the antenna's overall height. A two-dimensional Chebyshev distribution is employed to design a 1 to 48 power divider. Through simulation, the antenna demonstrates an 11% bandwidth, 38.4 dB gain, sidelobe levels better than 19 dB in both planes, an approximate beam width of 2.4 degrees at the center frequency, efficiency higher than 86%, and a null depth better than -38 dB. The radiation patterns exhibit good symmetry in both the E and H planes. A one-twelfth scale model of the antenna is constructed, with measurement results showing excellent agreement with the simulation.

کلیدواژه‌ها [English]

  • high gain
  • high efficiency
  • 45°
  • linear polarization
  • monopulse antenna

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مراجع

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رادار
دوره 11، شماره 1
شماره پیاپی 29، فصلنامه بهار و تابستان
شهریور 1402

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سابقه مقاله

  • تاریخ دریافت: 03 خرداد 1402
  • تاریخ بازنگری: 29 تیر 1402
  • تاریخ پذیرش: 15 مرداد 1402
  • تاریخ انتشار: 01 شهریور 1402

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