An all-metal high-gain radial-line slot-array antenna for low-cost satellite communication systems

Mst Nishat Yasmin Koli; Muhammad U. Afzal; Karu P. Esselle; Raheel M. Hashmi

doi:10.1109/ACCESS.2020.3012787

An all-metal high-gain radial-line slot-array antenna for low-cost satellite communication systems

Mst Nishat Yasmin Koli^*, Muhammad U. Afzal, Karu P. Esselle, Raheel M. Hashmi

^*Corresponding author for this work

School of Engineering

Research output: Contribution to journal › Article › peer-review

31 Citations (Scopus)

255 Downloads (Pure)

Abstract

This article presents a method to produce a highly directive circularly polarized radiation beam (gain>35 dBi) from an all-metal circularly polarized radial-line slot array (RLSA) antenna. The antenna comprises a single-layer radial TEM waveguide, fully filled with air, formed between a metal ground plate and a parallel metal slotted sheet, leading to simple, low-cost fabrication. A prototype of the new antenna having a diameter of 0.4 m or 27λ ₀ , where λ ₀ is the free-space wavelength at the operating frequency of 20 GHz, was fabricated and tested. Its measured peak broadside directivity and measured peak realized gain are 36.3 dBic and 35.9 dBic, respectively. The total thickness of the antenna is only 6.5 mm or 0.43λ ₀ . The aperture efficiency of the prototype is 56%, total efficiency is 95.4%, and measured 3-dB axial ratio bandwidth is 4.9 GHz (22.9%). The antenna has excellent cross-polar rejection, with a measured cross-polar level of -24.4 dB in the broadside direction. This antenna has been targeted for low-cost SATCOM terminals and wireless backhauls but due to the lack of dielectrics, it may also be useful for space and high-power microwave applications.

Original language	English
Pages (from-to)	139422-139432
Number of pages	11
Journal	IEEE Access
Volume	8
DOIs	https://doi.org/10.1109/ACCESS.2020.3012787
Publication status	Published - 2020

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Copyright the Author(s). 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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10.1109/ACCESS.2020.3012787Licence: CC BY

Publisher version (open access)Final published version, 3.38 MBLicence: CC BY

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@article{a27a78d2b9354364963599616d57d0d8,

title = "An all-metal high-gain radial-line slot-array antenna for low-cost satellite communication systems",

abstract = "This article presents a method to produce a highly directive circularly polarized radiation beam (gain>35 dBi) from an all-metal circularly polarized radial-line slot array (RLSA) antenna. The antenna comprises a single-layer radial TEM waveguide, fully filled with air, formed between a metal ground plate and a parallel metal slotted sheet, leading to simple, low-cost fabrication. A prototype of the new antenna having a diameter of 0.4 m or 27λ 0 , where λ 0 is the free-space wavelength at the operating frequency of 20 GHz, was fabricated and tested. Its measured peak broadside directivity and measured peak realized gain are 36.3 dBic and 35.9 dBic, respectively. The total thickness of the antenna is only 6.5 mm or 0.43λ 0 . The aperture efficiency of the prototype is 56\%, total efficiency is 95.4\%, and measured 3-dB axial ratio bandwidth is 4.9 GHz (22.9\%). The antenna has excellent cross-polar rejection, with a measured cross-polar level of -24.4 dB in the broadside direction. This antenna has been targeted for low-cost SATCOM terminals and wireless backhauls but due to the lack of dielectrics, it may also be useful for space and high-power microwave applications.",

author = "Koli, \{Mst Nishat Yasmin\} and Afzal, \{Muhammad U.\} and Esselle, \{Karu P.\} and Hashmi, \{Raheel M.\}",

note = "Copyright the Author(s). 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.",

year = "2020",

doi = "10.1109/ACCESS.2020.3012787",

language = "English",

volume = "8",

pages = "139422--139432",

journal = "IEEE Access",

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publisher = "Institute of Electrical and Electronics Engineers (IEEE)",

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AU - Koli, Mst Nishat Yasmin

AU - Afzal, Muhammad U.

AU - Esselle, Karu P.

AU - Hashmi, Raheel M.

N1 - Copyright the Author(s). 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 - 2020

Y1 - 2020

N2 - This article presents a method to produce a highly directive circularly polarized radiation beam (gain>35 dBi) from an all-metal circularly polarized radial-line slot array (RLSA) antenna. The antenna comprises a single-layer radial TEM waveguide, fully filled with air, formed between a metal ground plate and a parallel metal slotted sheet, leading to simple, low-cost fabrication. A prototype of the new antenna having a diameter of 0.4 m or 27λ 0 , where λ 0 is the free-space wavelength at the operating frequency of 20 GHz, was fabricated and tested. Its measured peak broadside directivity and measured peak realized gain are 36.3 dBic and 35.9 dBic, respectively. The total thickness of the antenna is only 6.5 mm or 0.43λ 0 . The aperture efficiency of the prototype is 56%, total efficiency is 95.4%, and measured 3-dB axial ratio bandwidth is 4.9 GHz (22.9%). The antenna has excellent cross-polar rejection, with a measured cross-polar level of -24.4 dB in the broadside direction. This antenna has been targeted for low-cost SATCOM terminals and wireless backhauls but due to the lack of dielectrics, it may also be useful for space and high-power microwave applications.

AB - This article presents a method to produce a highly directive circularly polarized radiation beam (gain>35 dBi) from an all-metal circularly polarized radial-line slot array (RLSA) antenna. The antenna comprises a single-layer radial TEM waveguide, fully filled with air, formed between a metal ground plate and a parallel metal slotted sheet, leading to simple, low-cost fabrication. A prototype of the new antenna having a diameter of 0.4 m or 27λ 0 , where λ 0 is the free-space wavelength at the operating frequency of 20 GHz, was fabricated and tested. Its measured peak broadside directivity and measured peak realized gain are 36.3 dBic and 35.9 dBic, respectively. The total thickness of the antenna is only 6.5 mm or 0.43λ 0 . The aperture efficiency of the prototype is 56%, total efficiency is 95.4%, and measured 3-dB axial ratio bandwidth is 4.9 GHz (22.9%). The antenna has excellent cross-polar rejection, with a measured cross-polar level of -24.4 dB in the broadside direction. This antenna has been targeted for low-cost SATCOM terminals and wireless backhauls but due to the lack of dielectrics, it may also be useful for space and high-power microwave applications.

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DO - 10.1109/ACCESS.2020.3012787

M3 - Article

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SN - 2169-3536

VL - 8

SP - 139422

EP - 139432

JO - IEEE Access

JF - IEEE Access

ER -

An all-metal high-gain radial-line slot-array antenna for low-cost satellite communication systems

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