Publication detail

High-gain, Circularly-polarized THz Antenna with Proper Modeling of Structures with Thin Metallic Walls

WARMOWSKA, D. ATIA ABDALMALAK, K. GARCÍA MUÑOZ, L. RAIDA, Z.

Original Title

High-gain, Circularly-polarized THz Antenna with Proper Modeling of Structures with Thin Metallic Walls

English Title

High-gain, Circularly-polarized THz Antenna with Proper Modeling of Structures with Thin Metallic Walls

Language

en

Original Abstract

In the paper, a corporate feed antenna array with slot radiators and a layer of polarizing patches is designed to operate at 350 GHz. The antenna is conceived as a silicon structure fully metalized by gold. Different methods for modeling thin gold layers at terahertz frequencies are compared and the optimum approaches are chosen depending on the thickness of the metal layer and its relation to the skin depth. Two designed antenna arrays are in 2×2 and 4×4 configuration, radiate circularly polarized waves, and have high gains of 13.8 dBi and 18.4 dBi, respectively. Antenna arrays have a low profile of only 1.3 λ0. Cheaper and more available manufacturing technology is presented and discussed in detail together with the measurement results of three manufactured prototypes. Small deviations between the simulated results and the measured ones are obtained due to a lower surface roughness, which is confirmed by the scanning probe microscope. Comparison with state-of-the-art antenna arrays demonstrates that the proposed arrays excel in easy/low-cost manufacturing, high gain, circular polarization with good axial-ratio bandwidth, compact size, and the possibility to easily extend the array into a larger version.

English abstract

In the paper, a corporate feed antenna array with slot radiators and a layer of polarizing patches is designed to operate at 350 GHz. The antenna is conceived as a silicon structure fully metalized by gold. Different methods for modeling thin gold layers at terahertz frequencies are compared and the optimum approaches are chosen depending on the thickness of the metal layer and its relation to the skin depth. Two designed antenna arrays are in 2×2 and 4×4 configuration, radiate circularly polarized waves, and have high gains of 13.8 dBi and 18.4 dBi, respectively. Antenna arrays have a low profile of only 1.3 λ0. Cheaper and more available manufacturing technology is presented and discussed in detail together with the measurement results of three manufactured prototypes. Small deviations between the simulated results and the measured ones are obtained due to a lower surface roughness, which is confirmed by the scanning probe microscope. Comparison with state-of-the-art antenna arrays demonstrates that the proposed arrays excel in easy/low-cost manufacturing, high gain, circular polarization with good axial-ratio bandwidth, compact size, and the possibility to easily extend the array into a larger version.

Keywords

Antenna arrays, Antennas and propagation, Modeling, Nanofabrication, Terahertz antenna array, terahertz gold conductivity, thin metal modeling.

Released

28.08.2020

Publisher

IEEE

Pages from

1

Pages to

10

Pages count

10

URL

Full text in the Digital Library

BibTex


@inproceedings{BUT164432,
  author="Dominika {Warmowska} and Kerlos {Atia Abdalmalak} and Luis Enrique {García Muñoz} and Zbyněk {Raida}",
  title="High-gain, Circularly-polarized THz Antenna with Proper Modeling of Structures with Thin Metallic Walls",
  annote="In the paper, a corporate feed antenna array with slot radiators and a layer of polarizing patches is designed to operate at 350 GHz. The antenna is conceived as a silicon structure fully metalized by gold. Different methods for modeling thin gold layers at terahertz frequencies are compared and the optimum approaches are chosen depending on the thickness of the metal layer and its relation to the skin depth. Two designed antenna arrays are in 2×2 and 4×4 configuration, radiate circularly polarized waves, and have high gains of 13.8 dBi and 18.4 dBi, respectively. Antenna arrays have a low profile of only 1.3 λ0. Cheaper and more available manufacturing technology is presented and discussed in detail together with the measurement results of three manufactured prototypes. Small deviations between the simulated results and the measured ones are obtained due to a lower surface roughness, which is confirmed by the scanning probe microscope. Comparison with state-of-the-art antenna arrays demonstrates that the proposed arrays excel in easy/low-cost manufacturing, high gain, circular polarization with good axial-ratio bandwidth, compact size, and the possibility to easily extend the array into a larger version.",
  address="IEEE",
  booktitle="IEEE Access",
  chapter="164432",
  doi="10.1109/ACCESS.2020.3007576",
  howpublished="online",
  institution="IEEE",
  number="1",
  year="2020",
  month="august",
  pages="1--10",
  publisher="IEEE"
}