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An Efficient Photomixer Based Slot Fed Terahertz Dielectric Resonator Antenna †

A slot fed terahertz dielectric resonator antenna driven by an optimized photomixer is proposed, and the interaction of the laser and photomixer is studied. It is demonstrated that in a continuous wave terahertz photomixing scheme, the generated THz power is proportional to the 4th power of the surf...

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Autores principales: Li, Xiaohang, Yin, Wenfei, Khamas, Salam
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7866193/
https://www.ncbi.nlm.nih.gov/pubmed/33525561
http://dx.doi.org/10.3390/s21030876
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author Li, Xiaohang
Yin, Wenfei
Khamas, Salam
author_facet Li, Xiaohang
Yin, Wenfei
Khamas, Salam
author_sort Li, Xiaohang
collection PubMed
description A slot fed terahertz dielectric resonator antenna driven by an optimized photomixer is proposed, and the interaction of the laser and photomixer is studied. It is demonstrated that in a continuous wave terahertz photomixing scheme, the generated THz power is proportional to the 4th power of the surface electric field of photocondutive layer. Consequently, the optical to THz conversion efficiency of the proposed photomixer has an enhancement factor of 487. This is due to the fact that the surface electric field of the proposed photomixer with a 2D-Photonic Crystal (PhC) superstrate has been improved from 2.1 to 9.9 V/m, which represents a substantial improvement. Moreover, the electrically thick Gallium-Arsenide (GaAs) supporting substrate of the device has been truncated to create a dielectric resonator antenna (DRA) that offers a typical radiation efficiency of more than 90%. By employing a traditional coplanar strip (CPS) biasing network, the matching efficiency has been improved to 24.4%. Therefore, the total efficiency has been considerably improved due to the enhancements in the laser-to-THz conversion, as well as radiation and matching efficiencies. Further, the antenna gain has been improved to 9dBi at the presence of GaAs superstrate. Numerical comparisons show that the proposed antenna can achieve a high gain with relatively smaller dimensions compared with traditional THz antenna with Si lens.
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spelling pubmed-78661932021-02-07 An Efficient Photomixer Based Slot Fed Terahertz Dielectric Resonator Antenna † Li, Xiaohang Yin, Wenfei Khamas, Salam Sensors (Basel) Letter A slot fed terahertz dielectric resonator antenna driven by an optimized photomixer is proposed, and the interaction of the laser and photomixer is studied. It is demonstrated that in a continuous wave terahertz photomixing scheme, the generated THz power is proportional to the 4th power of the surface electric field of photocondutive layer. Consequently, the optical to THz conversion efficiency of the proposed photomixer has an enhancement factor of 487. This is due to the fact that the surface electric field of the proposed photomixer with a 2D-Photonic Crystal (PhC) superstrate has been improved from 2.1 to 9.9 V/m, which represents a substantial improvement. Moreover, the electrically thick Gallium-Arsenide (GaAs) supporting substrate of the device has been truncated to create a dielectric resonator antenna (DRA) that offers a typical radiation efficiency of more than 90%. By employing a traditional coplanar strip (CPS) biasing network, the matching efficiency has been improved to 24.4%. Therefore, the total efficiency has been considerably improved due to the enhancements in the laser-to-THz conversion, as well as radiation and matching efficiencies. Further, the antenna gain has been improved to 9dBi at the presence of GaAs superstrate. Numerical comparisons show that the proposed antenna can achieve a high gain with relatively smaller dimensions compared with traditional THz antenna with Si lens. MDPI 2021-01-28 /pmc/articles/PMC7866193/ /pubmed/33525561 http://dx.doi.org/10.3390/s21030876 Text en © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Letter
Li, Xiaohang
Yin, Wenfei
Khamas, Salam
An Efficient Photomixer Based Slot Fed Terahertz Dielectric Resonator Antenna †
title An Efficient Photomixer Based Slot Fed Terahertz Dielectric Resonator Antenna †
title_full An Efficient Photomixer Based Slot Fed Terahertz Dielectric Resonator Antenna †
title_fullStr An Efficient Photomixer Based Slot Fed Terahertz Dielectric Resonator Antenna †
title_full_unstemmed An Efficient Photomixer Based Slot Fed Terahertz Dielectric Resonator Antenna †
title_short An Efficient Photomixer Based Slot Fed Terahertz Dielectric Resonator Antenna †
title_sort efficient photomixer based slot fed terahertz dielectric resonator antenna †
topic Letter
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7866193/
https://www.ncbi.nlm.nih.gov/pubmed/33525561
http://dx.doi.org/10.3390/s21030876
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