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Dirac Leaky Wave Antenna for the Microwave and the mm-Wave Band

Rezaee Ahvanouee, Sina | 2018

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 51288 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Memarian, Mohammad
  7. Abstract:
  8. Novel Dirac Leaky Wave Antennas (DLWAs) based on Substrate Integrated Waveguide (SIW) are presented in this thesis, for millimeter wave frequencies. These DLWAs provide interesting features such as radiating through broadside, beam scanning and ease in fabrication that are well suited for emerging fifth generation (5G) and IoT applications. In this thesis, it is shown that a Dirac photonic crystal can be realized in SIW technology composed of air columns inside a host SIW waveguide, exhibiting a closed bandgap and linear dispersion around broadside. Phase and attenuation constants are controlled to obtain directive beam and scanning in a wide range of angles (from -30˚ to 20˚). This DLWA has a wide impedance bandwidth around 28GHz with high efficiency, and operates with a peak gain of 16 dBi with less than 0.82 dB gain variation throughout the frequency range from 25 GHz to 31 GHz. A theoretical analysis based on mode-matching was carried out to derive the Dirac dispersion in the structure. Several designs were presented, and corresponding prototypes were fabricated using a RO4003 substrate. Measurement results showed excellent agreement with simulations, proving the validity of the proposed concepts
  9. Keywords:
  10. Frequency Scanning Antenna ; Internet of Things ; Fifth Generation of Mobile Networks ; Microwave Wave ; Millimeter Wave ; Substrate Integrated Waveguide Structure ; Dirac Leaky Wave Antenna ; Broadside Radiation

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