Title
Feasibility Study of Quasi-Optical MIMO Antennas for Radiative Near-Field Links
Author
Llombart, Nuria (TU Delft Tera-Hertz Sensing) 
Dabironezare, Shahab Oddin (TU Delft Tera-Hertz Sensing)
Date
2022
Abstract
This article presents a feasibility study of single feed per beam quasi-optical (QO) antennas for enabling incoherent multiple-input multiple-output (MIMO) array front-end architectures at 270 GHz. The objective is to reach ultrafast and radiated energy efficient point-to-point (PtP) wireless links by exploiting the multimode capacity of radiative (Fresnel region) near-field links. In this article, we present a feasibility study of the number of independent links achievable with QO MIMO incoherent arrays. For this purpose, we present theoretical curves of the level of EM co-coupling and interference between the multiple modes versus the link distance. The study focuses at the 252-325 GHz spectral bandwidth defined by the new IEEE 802.15.3d standard. A specific and new MIMO array architecture operating at 270 GHz based on a 2 × 2 array of parabolic reflectors is proposed for a link distance of 100 m. The proposed PtP MIMO system is capable of generating 16 dual-polarized modes in a 70 GHz bandwidth with signal-to-interference ratio >17 dB and a power co-coupling coefficient of -3 dB without the need for interference cancelation techniques. Combining this architecture with wideband front ends could potentially lead to an aggregated data rate in the order of terabit per second in a PtP wireless line-of-sight link, not previously achieved experimentally to the best of authors' knowledge.
Subject
Multiple-input multiple-output (MIMO)
quasi-optical (QO) antennas
sub-THz
wireless links
To reference this document use:
http://resolver.tudelft.nl/uuid:696c6a2b-d6da-4e8b-ae02-30ddc9c7e0fd
DOI
https://doi.org/10.1109/TAP.2022.3168724
Embargo date
2023-07-01
ISSN
0018-926X
Source
IEEE Transactions on Antennas and Propagation, 70 (8), 7073-7083
Bibliographical note
Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.
Part of collection
Institutional Repository
Document type
journal article
Rights
© 2022 Nuria Llombart, Shahab Oddin Dabironezare