طراحی و ساخت آنتن میکرواستریپ با پهنای باند بالا به روش آرایه‌ی متناوب لگاریتمی با تغذیه Inset و Proximity

خلیل پور, جعفر; زارع زاده, اسماعیل; حاجبی, مریم

طراحی و ساخت آنتن میکرواستریپ با پهنای باند بالا به روش آرایه‌ی متناوب لگاریتمی با تغذیه Inset و Proximity

نویسندگان

¹ دانشگاه پدافند هوایی خاتم الانبیاء(ص)

² دانشگاه صنعتی امیرکبیر

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

20.1001.1.26455153.1395.4.3.5.1

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

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