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طراحی و ساخت آنتن میکرواستریپ با پهنای باند بالا به روش آرایه‌ی متناوب لگاریتمی با تغذیه Inset و Proximity | ||
| الکترومغناطیس کاربردی | ||
| مقاله 5، دوره 4، شماره 3، آبان 1395، صفحه 45-56 اصل مقاله (1.63 M) | ||
| نویسندگان | ||
| جعفر خلیل پور* 1؛ اسماعیل زارع زاده2؛ مریم حاجبی2 | ||
| 1دانشگاه پدافند هوایی خاتم الانبیاء(ص) | ||
| 2دانشگاه صنعتی امیرکبیر | ||
| تاریخ دریافت: 23 مهر 1396، تاریخ بازنگری: 06 اسفند 1397، تاریخ پذیرش: 28 شهریور 1397 | ||
| چکیده | ||
| در این مقاله برای افزایش پهنای باند آنتن‌های میکرواستریپی، از آرایه‌های متناوب لگاریتمی استفاده شده است و برای تغذیه آرایه‌ها نیز روش‌های تغذیه‌ی Inset و Proximity انتخاب شدند. شبیه‌سازی‌ها و نتایج آزمایشگاهی نشان دادند که با استفاده از تغذیه Inset پهنای باند افزایش یافته و تطبیق امپدانسی بهتر از ترمینال ورودی حاصل می‌شود. بعلاوه با استفاده از تغذیه Proximity به دلیل حذف اتصالات T شکل و لحیم‌کاری‌ها، تشعشعات ناخواسته از بین رفته و در نتیجه بهره و پهنای باند بیشتر و ابعاد کوچکتری نسبت به آنتن با تغذیه Inset به دست می‌آید. در این مقاله از یک ماده دی‌الکتریک از جنس FR4 با ضخامت mm6/1 و ثابت دی‌الکتریک 4/4ε_r= استفاده شده است و فرکانس تشدید و امپدانس مشخصه خط تغذیه به ترتیب GHz 03/3 و Ω50 در نظر گرفته شده‌اند. با استفاده از آرایه متناوب لگاریتمی، پهنای‌باند امپدانسی و بهره‌ی آنتن میکرواستریپ به ترتیب از %7/2 و حدودdB 2 برای تک المان، به %4/27 وdB 8 برای 5 المان افزایش می یابد. | ||
| کلیدواژه‌ها | ||
| آنتن میکرواستریپ؛ آرایه متناوب لگاریتمی؛ تغذیه Inset؛ تغذیه Proximity؛ تطبیق امپدانسی | ||
| عنوان مقاله [English] | ||
| Design and Fabrication of Microstrip Antenna Using Log-Periodic Array for Bandwidth Enhancement with Inset and Proximity Feed | ||
| چکیده [English] | ||
| This study deals with a design and implementation of a microstrip patch antenna array that are feeding by Inset and Proximity methods. Results showed that antenna would have high frequency bandwidth and better impedance matching in Inset feeding. Also in Proximity feeding, unwanted radiation vanished because T-shape connections were eliminated. Simulation and experimental results cleared that antenna in the Proximity method has a smaller size, more gain and better impedance bandwidth than the Inset method. This paper chooses dielectric material FR4 with dielectric substrate permittivity of 4.4 by h=1.6mm. Therefore, operational frequency and input impedance are equal to 3.03 GHz and 50 ohm. Meanwhile, results showed impedance bandwidth and gain increased from 2.7% and 2dB for single arrays to 27.4% and 8dB for 5 arrays.. | ||
| کلیدواژه‌ها [English] | ||
| Microstrip Antenna, Log-Periodic Array, Inset Feed, Proximity Feed, Impedance Matching | ||
| مراجع | ||
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