طراحی، شبیه سازی و ساخت آنتن آرایه ای شکافدار خطی شعاعی توان بالا

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکترا، دانشگاه جامع امام حسین (ع)، تهران، ایران

2 استادیار، دانشگاه جامع امام حسین (ع)، تهران، ایران

3 استاد، دانشگاه علم و صنعت ایران، تهران، ایران

چکیده

آنتن‌های آرایه‌ای شکافدار خطی شعاعی از نوع آنتن های موجبری شکافدار هستند. این آنتن ها بازدهی بالایی دارند و برای تولید قطبش دایروی به کار می روند. در این مقاله از یک ساختار موج آهسته برای افزایش توان قابل تحمل آنتن استفاده شده است. استفاده از این ساختار باعث ایجاد یک آنتن آرایه ای شکافدار خطی شعاعی دو طبقه می شود. روی ساختار موج آهسته، صفحه ی شکاف ها قرار دارد که بوسیله ی همین ساختار تغذیه می شوند. هر دو شکاف عمود بر هم (برای ایجاد قطبش دایروی) یک واحد تشعشع را تشکیل می دهند. واحد های تشعشع روی یک مسیر حلزونی به فواصل مشخص از هم، توزیع شده‌اند. این آنتن برای کار در فرکانس مرکزی 9/45 گیگا هرتز و شعاع 270 میلی متر طراحی، شبیه سازی و ساخته شده است. طبق نتایج شبیه سازی مقدار ضریب بازتاب 18/93- دسی بل، بازدهی تشعشعی بیش از 93 درصد و بازدهی دهانه حدوداً 28/5 درصد است. مقدار ضریب بازتاب برای نمونه ساخته شده در بازه ی 9/385 گیگا هرتز تا 9/417 گیگا هرتز کمتر از 10- دسی بل است. مقدار بهره برای این آنتن 29/1 دسی بل، نسبت محوری کمتر از 3 دسی بل و توان قابل تحمل آن 123/4 مگا وات تعیین شده است.

کلیدواژه‌ها


عنوان مقاله [English]

Design, Simulation, and Fabrication of High Power Radial Line Slot Array Antennas

نویسندگان [English]

  • Fallah Mohammadzadeh 1
  • Ali Hasani 2
  • Mohammad Khalaj Amirhossini 3
1 PhD student, Imam Hossein University (AS), Tehran, Iran
2 Assistant Professor, Imam Hossein University (AS), Tehran, Iran
3 Professor, Iran University of Science and Technology, Tehran, Iran
چکیده [English]

Radial linear slotted array antennas are slotted wave-guide antennas. These antennas are highly efficient and are used to produce circular polarization. In this paper, a slow wave structure is used to increase the tolerable power of the antenna. The use of this structure creates a two-level radial linear slot array antenna. On the slow wave structure, there is a slot plate that is fed by this structure. Both slots perpendicular to each other (to create circular polarization) form a unit of radiation. Radiation units are distributed on a spiral path at regular intervals. This antenna is designed, simulated, and built to operate at a frequency of 9.45 GHz and a radius of 270 mm. According to the simulation results, the reflection coefficient is -18.93 dB, the radiation efficiency is more than 93% and the aperture efficiency is 28.5%. The evaluation of the value of the reflection coefficient for a sample made in the range of 9.385 GHz to 9.417 GHz is less than -10 dB.

کلیدواژه‌ها [English]

  • : Radial Linear Slot Array Antenna (RLSA)
  • High Power Microwave (HPM)
  • Radial Waveguides
  • Slow-Wave Structures (SWS)

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دوره 11، شماره 1 - شماره پیاپی 26
شماره پیاپی 26، دوفصلنامه بهار و تابستان
خرداد 1402
صفحه 75-85
  • تاریخ دریافت: 24 آذر 1400
  • تاریخ بازنگری: 15 اردیبهشت 1401
  • تاریخ پذیرش: 15 تیر 1401
  • تاریخ انتشار: 01 خرداد 1402