A monolithically printed filtering waveguide aperture antenna

Rashad H. Mahmud, Raad S. Jarjees, Yang Yu, Ekasit Nugoolcharoenlap, Talal Skaik, Moataz M. Attallah, Yi Wang

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Abstract

This letter presents the design of a 3 rd order filtering waveguide aperture antenna based on coupled cavity resonators. Three offset-coupled rectangular waveguide cavities are employed in the design realizing two nested loaded-stubs without costing extra structure and size. The loaded-stubs introduce two controllable transmission zeroes and enhance the out-of-band realized gain selectivity. To validate the predicted results, a prototype operating at the X- band frequencies has been fabricated monolithically using the 3-D selective laser melting printing technique. The measured results are in very good agreement with the simulated results, showing a flat gain response of 7.0 ± 0.2 dBi from 9.5–10.5 GHz with very good out-of-band selectivity. The fractional bandwidth is about 10% at 10 GHz when S 11 = -20 dB. Compared to the previously designed filtering antennas, the proposed design has the advantages of stronger out-of-band gain selectivity and low profile.
Original languageEnglish
Article number10015035
Pages (from-to)1-5
Number of pages5
JournalIEEE Antennas and Wireless Propagation Letters
Early online date11 Jan 2023
DOIs
Publication statusE-pub ahead of print - 11 Jan 2023

Keywords

  • Aperture antennas
  • cavity resonators
  • coupling matrix
  • filtering antennas
  • selective laser melting (SLM)
  • transmission zeros
  • waveguide
  • 3-D printing

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