یک آنتن میکرواستریپ فرکتالی کوچکشده با عملکرد چندفرکانسی
محورهای موضوعی : مهندسی برق و کامپیوتر
1 - دانشگاه صنعتی شیراز
2 - دانشگاه صنعتی شیراز
کلید واژه: آنتن فرکتال کوچکسازی چندفرکانسی آنتن میکرواستریپ کوپلینگ مجاورتی,
چکیده مقاله :
کاربردهای زیادتر و متنوعتر سیستمهای مخابراتی نیاز به استفاده بیشتری از تمامی طیف الکترومغناطیسی را الزامی کرده است و همچنین به وجود آمدن سیستمهای چندبانده نیاز به آنتنهایی با قابلیت تشدید در چند فرکانس را افزایش داده است. امروزه با توجه به پیشرفت سیستمهای بیسیم استفاده از آنتنهای سبک، ساده، کوچک و ارزان که بتواند چند طیف فرکانسی سیستم را پوشش بدهد یک نیاز اساسی است. در این مقاله آنتنی با ایده فرکتالی میکرواستریپی پیشنهاد و طراحی میشود که با ابعادی کوچک و سبک و همچنین قیمتی ارزان بتواند در چندین فرکانس تشدید کند. این آنتن در محدوده فرکانسی حدود یک گیگاهرتز تا ده گیگاهرتز دارای پنج فرکانس تشدید است. نتایج اندازهگیری آنتن ساختهشده با نتایج شبیهسازی که توسط نرمافزار HFSS انجام گرفته، تطبیق خوبی را نشان میدهد. همچنین این آنتن دارای پترن مناسب و قطبش دایروی است که کاربرد آن را بیشتر میکند.
For further and various applications of communication systems, we lead to using the overall of electromagnetic spectrum. Also, because of the developing f multiband wireless systems, antenna designers are enforced to design antennas matched to the operation in multi-band and multi-frequency. On the other hand, nowadays, the use of light-weight, simple, small and inexpensive antennas is an essential requirement for covering multi bands. In this paper, a microstrip antenna is designed and suggested fractal-based and utilized FR4 substrate with small size and light, and also ability to resonance in multi-frequency by increasing fractal repetitions and self-similarity property. Therefore, this proposed structure causes the antenna resonance in more frequencies, and also leads to miniaturization of its size. This antenna operates in 1-10 GHz range includes five frequency resonance for the most of convenient applications. Also, it has appropriate pattern and circular polarization which increases its applications. The antenna has been fabricated and there is a good agreement between measurement results and full wave simulation using HFSS software.
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