Increasing the directivity of resonant cavity antennas with nearfield transformation meta-structure realized with stereolithograpy

Sujan Shrestha*, Hijab Zahra, Muhammad Ali Babar Abbasi, Mohsen Asadnia, Syed Muzahir Abbas

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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Abstract

A simple, nearfield transformation meta-structure is proposed to increase the directivity of resonant cavity antennas (RCA). The meta-structure is comprised of 14 × 14 meta-atoms or so called "unit-cells", adding localized phase delays in the aperture of the RCA and thus increasing its broadside directivity. A prototype of the meta-structure is additively manufactured using the stereolithograpy process and has a profile of 0.56λ. With the meta-structure integrated with the RCA, it demonstrates a measured broadside directivity of 20.15 dBi without affecting its half-power directivity bandwidth. Benefiting from additive manufacturing, the proposed approach is a simple, light-weight, low-cost, and planar approach that can be tailored to achieve medium-to-high gains with RCAs.

Original languageEnglish
Article number333
Pages (from-to)1-12
Number of pages12
JournalElectronics
Volume10
Issue number3
DOIs
Publication statusPublished - 1 Feb 2021

Bibliographical note

Copyright the Author(s) 2021. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Keywords

  • stereolithograpy
  • additive manufacturing
  • 3D-printed antenna
  • directional antenna
  • lens antennas
  • near field transformation
  • meta-structure

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