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 language | English |
---|---|
Article number | 333 |
Pages (from-to) | 1-12 |
Number of pages | 12 |
Journal | Electronics |
Volume | 10 |
Issue number | 3 |
DOIs | |
Publication status | Published - 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