A Wide-Angle Scanning Sub-Terahertz Leaky-Wave Antenna Based on a Multilayer Dielectric Image Waveguide
This paper presents a new layered dielectric leaky-wave antenna (LWA) for the sub-terahertz (THz) frequency range capable of efficient operation at the broadside with a wide beam scanning angle and stable gain. It consists of a conductor-backed alumina dielectric image line (DIL) with two different...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-09-01
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| Series: | Electronics |
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| Online Access: | https://www.mdpi.com/2079-9292/10/17/2172 |
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| author | Yalda Torabi Gholamreza Dadashzadeh Milad Hadeie Homayoon Oraizi Ali Lalbakhsh |
| author_facet | Yalda Torabi Gholamreza Dadashzadeh Milad Hadeie Homayoon Oraizi Ali Lalbakhsh |
| author_sort | Yalda Torabi |
| collection | DOAJ |
| description | This paper presents a new layered dielectric leaky-wave antenna (LWA) for the sub-terahertz (THz) frequency range capable of efficient operation at the broadside with a wide beam scanning angle and stable gain. It consists of a conductor-backed alumina dielectric image line (DIL) with two different dielectric layers mounted on top of each other for performance improvement. The upper layer is a high permittivity RO6010 substrate to enhance the directivity as a superstrate and the lower layer is a low-permittivity RT/duroid 5880 substrate stacked on the alumina DIL to prevent the probable excitation of higher-order modes in the DIL channel. A 15-element linear array of radiating overlapped discs is used to mitigate the open stop-band (OSB) problem, fed by the mentioned waveguide, was designed and simulated at frequencies around 170 GHz. The dominant mode of the layered dielectric waveguide is perturbed by the infinite space harmonics generated by two sets of overlapped discs periodically sandwiched between the layers. It exhibited a relatively wide impedance bandwidth of 28.19% (157.5–206 GHz). Its radiation mechanism has been widely studied through simulations. The results revealed that the antenna provides a wide scanning capability through the broadside from −23° to 38°, covering the frequency range between 157.5 GHz and 201.5 GHz. For an array with 15 radiating elements, the simulated peak gain in the band is 15 dBi and the broadside gain is 13.6 dBi at 172 GHz. |
| first_indexed | 2024-03-10T08:13:17Z |
| format | Article |
| id | doaj.art-06917a43070f4aa39d1e3cc013b6e18f |
| institution | Directory Open Access Journal |
| issn | 2079-9292 |
| language | English |
| last_indexed | 2024-03-10T08:13:17Z |
| publishDate | 2021-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Electronics |
| spelling | doaj.art-06917a43070f4aa39d1e3cc013b6e18f2023-11-22T10:31:00ZengMDPI AGElectronics2079-92922021-09-011017217210.3390/electronics10172172A Wide-Angle Scanning Sub-Terahertz Leaky-Wave Antenna Based on a Multilayer Dielectric Image WaveguideYalda Torabi0Gholamreza Dadashzadeh1Milad Hadeie2Homayoon Oraizi3Ali Lalbakhsh4School of Engineering, Iran University of Science and Technology, Tehran 1684613114, IranSchool of Engineering, Shahed University, Tehran 3319118651, IranSchool of Engineering, Shahed University, Tehran 3319118651, IranSchool of Engineering, Iran University of Science and Technology, Tehran 1684613114, IranSchool of Engineering, Macquarie University, Sydney 2109, AustraliaThis paper presents a new layered dielectric leaky-wave antenna (LWA) for the sub-terahertz (THz) frequency range capable of efficient operation at the broadside with a wide beam scanning angle and stable gain. It consists of a conductor-backed alumina dielectric image line (DIL) with two different dielectric layers mounted on top of each other for performance improvement. The upper layer is a high permittivity RO6010 substrate to enhance the directivity as a superstrate and the lower layer is a low-permittivity RT/duroid 5880 substrate stacked on the alumina DIL to prevent the probable excitation of higher-order modes in the DIL channel. A 15-element linear array of radiating overlapped discs is used to mitigate the open stop-band (OSB) problem, fed by the mentioned waveguide, was designed and simulated at frequencies around 170 GHz. The dominant mode of the layered dielectric waveguide is perturbed by the infinite space harmonics generated by two sets of overlapped discs periodically sandwiched between the layers. It exhibited a relatively wide impedance bandwidth of 28.19% (157.5–206 GHz). Its radiation mechanism has been widely studied through simulations. The results revealed that the antenna provides a wide scanning capability through the broadside from −23° to 38°, covering the frequency range between 157.5 GHz and 201.5 GHz. For an array with 15 radiating elements, the simulated peak gain in the band is 15 dBi and the broadside gain is 13.6 dBi at 172 GHz.https://www.mdpi.com/2079-9292/10/17/2172multilayer dielectric image waveguideleaky-wavesub-terahertzopen-stopband |
| spellingShingle | Yalda Torabi Gholamreza Dadashzadeh Milad Hadeie Homayoon Oraizi Ali Lalbakhsh A Wide-Angle Scanning Sub-Terahertz Leaky-Wave Antenna Based on a Multilayer Dielectric Image Waveguide Electronics multilayer dielectric image waveguide leaky-wave sub-terahertz open-stopband |
| title | A Wide-Angle Scanning Sub-Terahertz Leaky-Wave Antenna Based on a Multilayer Dielectric Image Waveguide |
| title_full | A Wide-Angle Scanning Sub-Terahertz Leaky-Wave Antenna Based on a Multilayer Dielectric Image Waveguide |
| title_fullStr | A Wide-Angle Scanning Sub-Terahertz Leaky-Wave Antenna Based on a Multilayer Dielectric Image Waveguide |
| title_full_unstemmed | A Wide-Angle Scanning Sub-Terahertz Leaky-Wave Antenna Based on a Multilayer Dielectric Image Waveguide |
| title_short | A Wide-Angle Scanning Sub-Terahertz Leaky-Wave Antenna Based on a Multilayer Dielectric Image Waveguide |
| title_sort | wide angle scanning sub terahertz leaky wave antenna based on a multilayer dielectric image waveguide |
| topic | multilayer dielectric image waveguide leaky-wave sub-terahertz open-stopband |
| url | https://www.mdpi.com/2079-9292/10/17/2172 |
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