A Triple-Band Branch-Line Coupler with Simple Structure and Design for WLAN and WiMAX Application
سال انتشار: 1400
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 179
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شناسه ملی سند علمی:
NREAS03_064
تاریخ نمایه سازی: 16 آبان 1400
چکیده مقاله:
A triple-band branch-line coupler that can operate at two arbitrary frequencies and their mean frequency is proposed. The tripleband operation is achieved by replacing quarter-wavelength impedance transformers in a conventional branch-line coupler by Tshape step impedance transformers comprising two short-circuited stub which can be equivalent to quarter-wavelength impedance transformers at three frequencies. The achieved coupler has simple structure and design process that lead to easily derive the closed-form design equations. For verification, a microstrip ۳ dB branch-line coupler operating at ۲.۳/۳.۷/۵.۱ GHz, covering WLAN and WiMAX frequency bands is designed, fabricated and measured. A Good agreement can be observed between the simulated and measured results.
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نویسندگان
seyyed hadi seyyedhatami
department of electrical engineering ardabil branch islamic azad university ardabil Iran