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

doi:10.3390/electronics10030333

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 journal › Article › peer-review

11 Citations (Scopus)

125 Downloads (Pure)

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	https://doi.org/10.3390/electronics10030333
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

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10.3390/electronics10030333Licence: CC BY

Publisher version (open access)Final published version, 1.98 MBLicence: CC BY

Cite this

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title = "Increasing the directivity of resonant cavity antennas with nearfield transformation meta-structure realized with stereolithograpy",

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.",

keywords = "stereolithograpy, additive manufacturing, 3D-printed antenna, directional antenna, lens antennas, near field transformation, meta-structure",

author = "Sujan Shrestha and Hijab Zahra and Abbasi, \{Muhammad Ali Babar\} and Mohsen Asadnia and Abbas, \{Syed Muzahir\}",

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.",

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doi = "10.3390/electronics10030333",

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T1 - Increasing the directivity of resonant cavity antennas with nearfield transformation meta-structure realized with stereolithograpy

AU - Shrestha, Sujan

AU - Zahra, Hijab

AU - Abbasi, Muhammad Ali Babar

AU - Asadnia, Mohsen

AU - Abbas, Syed Muzahir

N1 - 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.

PY - 2021/2/1

Y1 - 2021/2/1

N2 - 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.

AB - 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.

KW - stereolithograpy

KW - additive manufacturing

KW - 3D-printed antenna

KW - directional antenna

KW - lens antennas

KW - near field transformation

KW - meta-structure

UR - https://www.scopus.com/pages/publications/85100178089

U2 - 10.3390/electronics10030333

DO - 10.3390/electronics10030333

M3 - Article

AN - SCOPUS:85100178089

SN - 2079-9292

VL - 10

SP - 1

EP - 12

JO - Electronics

JF - Electronics

IS - 3

M1 - 333

ER -

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

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