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سنتز پرتو مسطح در آنتن بازتابنده چند تغذیه ای | ||
| رادار | ||
| مقاله 2، دوره 9، شماره 1 - شماره پیاپی 25، شهریور 1400، صفحه 17-23 اصل مقاله (710.8 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| نویسندگان | ||
| محمدحسین امینی1؛ ایمان آریانیان* 2 | ||
| 1دانشجوی دکتری، مرکز تحقیقات مخابرات ایران، تهران، ایران | ||
| 2استادیار، پژوهشگاه ارتباطات و فناوری اطلاعات، پژوهشکده فناوری ارتباطات، تهران، ایران | ||
| تاریخ دریافت: 15 فروردین 1400، تاریخ بازنگری: 04 خرداد 1400، تاریخ پذیرش: 14 آذر 1400 | ||
| چکیده | ||
| تحقیقات بسیاری بر روی آنتن‌های بازتابنده با هدف شکل دهی پرتو با استفاده از شکل‌دهی سطح انجام گرفته است. با این وجود مطالعات اندکی بر روی رهیافت چند تغذیه‌ای انجام گرفته است. هدف این مقاله تحقق پرتو مسطح در آنتن‌های بازتابنده با استفاده از رهیافت چند تغذیه‌ای است. در این راستا بر پایه الگوریتم ژنتیک و بکارگیری روش نور فیزیکی (PO)، ضرایب تحریک عناصر تغذیه آنتن بازتابنده در جهت تحقق پرتو موردنظر سنتز می‌گردند. در این مقاله همچنین، روشی جهت کاهش زمان محاسبه‌ی انتگرالهای تشعشعی PO پیشنهاد شده است. در روش حاضر انتگرالهای تشعشعیPO طی نگاشتی به فضای دو بعدی تصویر می‌گردد و در نتیجه زمان محاسبات به میزان 30 درصد کاهش می‌یابد. روند ارائه شده در جهت تحقق پرتو مسطح در بازه‌ی زاویه‌ای 20- تا 20+ مورد استفاده قرار گرفت و خصوصیات پرتو بدست آمده با آنچه از طریق روش شکل‌دهی به سطح بازتابنده انجام گرفته، مقایسه شده است. نتایج نشان می‌دهد که رهیافت چند تغذیه‌ای می‌تواند پرتو مورد نظر را با دقت بهتری حاصل کند. | ||
| کلیدواژه‌ها | ||
| آنتن بازتابندة چندتغذیه ای؛ پرتو مسطح؛ نور فیزیکی | ||
| عنوان مقاله [English] | ||
| The Flat-Topped Pattern Synthesis of the Multi-Feed Reflector Antenna | ||
| نویسندگان [English] | ||
| Mohammad Hossein Amini1؛ Iman Aryanian2 | ||
| 1PhD Student, Iran Telecommunication Research Center, Tehran, Iran | ||
| 2Assistant Professor, Research Institute of Communication and Information Technology, Research Institute of Communication Technology, Tehran, Iran | ||
| چکیده [English] | ||
| Numerous researches have been performed on the reflector antenna for realizing beam-shaping using level-shaping. However, little study has been done for realizing the shaped beam through the multi-feed approach. The main goal of this paper is to provide a synthesis procedure for realizing the flat-topped pattern in reflector antennas using the multi-feed approach. In this way, based on the genetic algorithm (GA) and utilizing the physical optic (PO) method, the excitation coefficient of the feeding array is synthesized to achieve the desired pattern. Furthermore, in this paper, an efficient method for reducing the computational time of PO integrals is introduced. In this way, the 3D PO integrals are mapped to 2D integrals; which results in about 30% computational time reduction. The proposed procedure is employed to realize a flat-topped pattern in the angular scope of -20o to +20o and the radiation characteristics are compared with those presented through the shaped reflector method in the literature. Results show that the multi-feed approach obtains the desired beam more accurately. | ||
| کلیدواژه‌ها [English] | ||
| Multi-Feed Reflector Antenna, Flat-Topped Pattern, Physical Optic | ||
| مراجع | ||
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آمار تعداد مشاهده مقاله: 256 تعداد دریافت فایل اصل مقاله: 225 |
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