طراحی مقسم توان موج میلی‌متری با ایزولاسیون بالا بر پایه موجبر شکاف هوایی

نوع مقاله : مقاله پژوهشی

نویسنده

استادیار، گروه مخابرات میدان، دانشکده برق و کامپیوتر، دانشگاه تحصیلات تکمیلی صنعتی و فناوری پیشرفته کرمان، کرمان، ایران

چکیده

در این مقاله، طراحی مقسم توان با ایزولاسیون بالا ارائه خواهد شد که بر پایه موجبر شکاف هوایی شیاری است. در این طراحی، از ساختاری شبیه مجیک-تی موجبری استفاده شده‌است که دهانة تفاضل آن به بار تطبیق وصل شده‌است. با استفاده از چندین مخروط هادی به‌صورت پله‌ای که در وسط ساختار قرار گرفته‌اند، تطبیق امپدانس با پهنای باند بالا و همچنین ایزولاسیون مورد نظر به‌دست آمده است. در ابتدا یک مقسم توان 1 به 2 طراحی خواهد شد که با ترکیب آنها با هم می‌توان به مقسم توان با خروجی‌های بیشتر دست یافت که بدین منظور، یک مقسم توان 1 به 4 نیز طراحی خواهد شد. نتایج شبیه‌سازی ساختار نشان می‌دهد که ساختار، دارای پهنای باند 33 درصد از فرکانس GHz 42 تا فرکانس GHz59 می‌باشد و در بازة فرکانسی مذکور، ضریب بازتاب ساختار کمتر از dB 15- ، تلفات عبوری کمتر از dB12/0 و ایزولاسیون بهتر از  dB18 می‌باشند که برای کاربردهای موج میلی‌متری مناسب است.

کلیدواژه‌ها


عنوان مقاله [English]

The Design of a High-Isolation Millimeter-Wave Power Divider Based on the Gap Waveguide Technology

نویسنده [English]

  • Ali Farahbakhsh
Assistant Professor, Department of Field Telecommunication, Faculty of Electrical and Computer Engineering, Kerman University of Industrial and Advanced Technology, Kerman, Iran
چکیده [English]

This paper presents the design of a high-isolation power divider based on the groove gap
waveguide. The proposed structure is similar to a rectangular waveguide Magic-T when its
difference port is terminated using a waveguide match-load. Wideband impedance matching and
high-isolation of the structure are obtained by placing some PEC steped cones inside the
structure. First, a 1×2-way power divider is designed such that by combining a specific number
of it, power dividers with more outputs can be acheived and to demonstrate this idea a 1×4-way
power divider is assembled. The results of simulating the proposed power divider show that the
structure has 33% frequency bandwidth covering from 42 GHz to 59 GHz. The structure
reflection coefficient is below -15 dB, the insertion loss is lower than 0.12 dB and the isolation
is better than 18 dB in the whole frequency bandwidth and the simulation results prove that the
proposed power divider is an excellent candidate for millimeter-wave applications.

کلیدواژه‌ها [English]

  • Power Divider
  • High-Isolation
  • Gap Waveguide Technology
  • Wideband Structure
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