علوم، فناوری و کاربردهای فضایی

علوم، فناوری و کاربردهای فضایی

کاهش ارتفاع آنتن دوقطبی مغناطیسی الکتریکی با قطبش دایروی و خطی با استفاده از رسانای مغناطیسی مصنوعی

نوع مقاله : مقاله پژوهشی

نویسندگان
1 دانشگاه صنعتی قم
2 استادیار/ پژوهشگاه ارتباطات و فناوری اطلاعات
چکیده
در این مقاله راه حلی برای کاهش ارتفاع آنتن های دوقطبی مغناطیسی الکتریکی با استفاده از ساختار هادی مغناطیسی مصنوعی به عنوان صفحه زمین آنتن ارائه شده است. در این تحقیق دو نوع آنتن مورد بررسی قرار گرفت: آنتن اول با قطبش خطی و آنتن دوم با قطبش دایروی راستگرد است. در آنتن با قطبش خطی، یک آرایه 7×7 از سلول‌های رسانای مغناطیسی مصنوعی (AMCs) در فرکانس 3.5 گیگاهرتز طراحی شد و روی صفحه زمین آنتن قرار گرفت. با افزودن هادی مغناطیسی مصنوعی، ارتفاع آنتن اول به  λ0.16 کاهش یافت. نتایج شبیه سازی نشان می دهد که پهنای باند امپدانس برای مقادیر |S11|<[-10dB] برابر با 1.9 گیگاهرتز از فرکانس 2.3 گیگاهرتز تا 4.2 گیگاهرتز (58.46 درصد) است، در حالی که پهنای باند امپدانس اندازه گیری شده نمونه ساخته شده برابر با 2.13 گیگاهرتز از فرکانس 2.21 گیگاهرتز تا 4.34 گیگاهرتز (65.03 درصد) است.
آنتن دوم یک آنتن دوقطبی مغناطیسی الکتریکی با قطبش دایروی راستگرد است که توسط یک خط تغذیه Y شکل تغذیه می شود. با استفاده از یک آرایه 5×5 AMC در صفحه زمین آنتن، ارتفاع آن به λ 0.13 کاهش یافت. پهنای باند امپدانس حاصل از شبیه سازی برای مقادیر |S11|<[-10dB] برابر است با 1.24 گیگاهرتز از فرکانس 2.46 گیگاهرتز تا فرکانس 3.7 گیگاهرتز (40.25%)، در حالی که پهنای باند حاصل از اندازه گیری نمونه ساخته شده برابر با 1.3 گیگاهرتز از فرکانس 2.38 گیگاهرتز تا فرکانس 3.68 گیگاهرتز (44.52%) می باشد.
کلیدواژه‌ها
موضوعات

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  • تاریخ دریافت 29 اردیبهشت 1402
  • تاریخ بازنگری 09 مرداد 1402
  • تاریخ پذیرش 10 مهر 1402