فیلتر میان‌گذر فوق پهن باند با باند توقف وسیع بر اساس ساختارهای فراماده

نویسندگان

دانشکده مهندسی برق - دانشگاه یزد

چکیده

در این مقاله، یک فیلتر فشرده و فوق پهن باند با باند توقف بسیار وسیع، با استفاده از ساختارهای فراماده ارائه شده است. در ابتدا یک سلول فراماده با ترکیب خازن‌های بین‌انگشتی و شاخه اتصال کوتاه اصلاح شده است؛ سپس با افزایش اندوکتانس سلفی خطوط دست چپی و کاهش ظرفیت خازنی خطوط دست راستی، دو قطب پایدار در این سلول -که در اصطلاح تشدیدگر نامیده می‌شود- ظاهر شده که باعث ایجاد پهنای باند نسبتاً وسیعی شده است. در ادامه، با متوالی قرار دادن پنج تشدیدگر پیشنهادی، به فیلتری با باند عبور 3.6-12 GHz  و باند قطع 7-14.20 GHzدست پیدا کرده‌ایم. اندازه کلی این فیلتر  8.475×30 است که در مقایسه با بسیاری از فیلترهای پهن‌باند موجود دارای اندازه بسیار فشرده‌تری می‌باشد.

کلیدواژه‌ها


عنوان مقاله [English]

An Ultra Wide Bandpass Filter with Wide Stop Band Based on Metamaterial Structures

نویسندگان [English]

  • K. Ramezani-Boldaji
  • M. Movahhedi
  • A. Ghafoorzade-Yazdi
Electrical Engineering Department, Yazd University, Yazd, Iran
چکیده [English]

In this paper, a new ultra wide band (UWB) filter with wide stop band, based on metamaterial structures is presented. At first, a new metamaterial unit cell including interdigital capacitor and short -circuited stub is repented. inductance and decreasing the right handed capacitance of the structure, two stable poles in the unit cell, which called resonator, are produced. Finally, by cascading five introduced resonators, an UWB filter with pass band from 2.8 GHz to 13.2 GHz and stop band from 14.7GHz to17 GHz is presented. The total size of the proposed filter is 30mm 8.85mm so that its size is more smaller in comparison with many other existing UWB filters.

کلیدواژه‌ها [English]

  • Ultra Wide Band-Pass Filter
  • Metamaterial
  • Interdigital Structure
  • Microstrip
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