Enabling Sub-Terahertz Broadband MIMO Communications With Leaky-Wave Antenna Arrays
The increasing demand for high-speed wireless communications has led to the exploration of the terahertz (THz) band, where the broad available bandwidths promise significant data-rate improvements. However, propagation losses and the primarily line-of-sight (LoS) nature of THz channels present chall...
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IEEE
2025-01-01
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| Series: | IEEE Open Journal of the Communications Society |
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| Online Access: | https://ieeexplore.ieee.org/document/10922200/ |
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| author | Albert Diez-Comas Duschia M. Bodet Josep M. Jornet |
| author_facet | Albert Diez-Comas Duschia M. Bodet Josep M. Jornet |
| author_sort | Albert Diez-Comas |
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| description | The increasing demand for high-speed wireless communications has led to the exploration of the terahertz (THz) band, where the broad available bandwidths promise significant data-rate improvements. However, propagation losses and the primarily line-of-sight (LoS) nature of THz channels present challenges for implementing spatial multiplexing in multiple-input multiple-output (MIMO) systems. In this paper, we propose a tilted leaky-wave antenna (LWA) array architecture to enable spatial multiplexing by leveraging the frequency-dependent beam-steering capabilities of LWAs. We present the first experimental implementation of a sub-THz, 2-element tilted LWA array. Our experimental results demonstrate that distinct data streams can be transmitted simultaneously with minimal interference. We also provide an analysis of the achievable data rates as a function of number of antennas and tilting angle, showing significant improvements under specific conditions. We further investigate the potential of a staircase LWA array in a multiuser scenario, showing that LWAs could be deployed in access points (APs) to exploit spatial multiplexing. In addition, we present a capacity comparison of different antenna array technologies. These findings establish the potential of tilted LWA arrays for future (sub-)THz MIMO systems, offering a practical approach to overcome the limitations of conventional spatial multiplexing techniques. |
| format | Article |
| id | doaj-art-6b7a768f448d44e68b6d4dfd3087b386 |
| institution | OA Journals |
| issn | 2644-125X |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Open Journal of the Communications Society |
| spelling | doaj-art-6b7a768f448d44e68b6d4dfd3087b3862025-08-20T02:12:24ZengIEEEIEEE Open Journal of the Communications Society2644-125X2025-01-0162293230710.1109/OJCOMS.2025.355030810922200Enabling Sub-Terahertz Broadband MIMO Communications With Leaky-Wave Antenna ArraysAlbert Diez-Comas0https://orcid.org/0009-0004-8581-6101Duschia M. Bodet1https://orcid.org/0000-0002-5069-7868Josep M. Jornet2https://orcid.org/0000-0001-6351-1754Department of Electrical and Computer Engineering, Northeastern University, Boston, MA, USADepartment of Electrical and Computer Engineering, Northeastern University, Boston, MA, USADepartment of Electrical and Computer Engineering, Northeastern University, Boston, MA, USAThe increasing demand for high-speed wireless communications has led to the exploration of the terahertz (THz) band, where the broad available bandwidths promise significant data-rate improvements. However, propagation losses and the primarily line-of-sight (LoS) nature of THz channels present challenges for implementing spatial multiplexing in multiple-input multiple-output (MIMO) systems. In this paper, we propose a tilted leaky-wave antenna (LWA) array architecture to enable spatial multiplexing by leveraging the frequency-dependent beam-steering capabilities of LWAs. We present the first experimental implementation of a sub-THz, 2-element tilted LWA array. Our experimental results demonstrate that distinct data streams can be transmitted simultaneously with minimal interference. We also provide an analysis of the achievable data rates as a function of number of antennas and tilting angle, showing significant improvements under specific conditions. We further investigate the potential of a staircase LWA array in a multiuser scenario, showing that LWAs could be deployed in access points (APs) to exploit spatial multiplexing. In addition, we present a capacity comparison of different antenna array technologies. These findings establish the potential of tilted LWA arrays for future (sub-)THz MIMO systems, offering a practical approach to overcome the limitations of conventional spatial multiplexing techniques.https://ieeexplore.ieee.org/document/10922200/Leaky-wave antenna (LWA)communicationsarrayMIMOspatial multiplexingOFDM |
| spellingShingle | Albert Diez-Comas Duschia M. Bodet Josep M. Jornet Enabling Sub-Terahertz Broadband MIMO Communications With Leaky-Wave Antenna Arrays IEEE Open Journal of the Communications Society Leaky-wave antenna (LWA) communications array MIMO spatial multiplexing OFDM |
| title | Enabling Sub-Terahertz Broadband MIMO Communications With Leaky-Wave Antenna Arrays |
| title_full | Enabling Sub-Terahertz Broadband MIMO Communications With Leaky-Wave Antenna Arrays |
| title_fullStr | Enabling Sub-Terahertz Broadband MIMO Communications With Leaky-Wave Antenna Arrays |
| title_full_unstemmed | Enabling Sub-Terahertz Broadband MIMO Communications With Leaky-Wave Antenna Arrays |
| title_short | Enabling Sub-Terahertz Broadband MIMO Communications With Leaky-Wave Antenna Arrays |
| title_sort | enabling sub terahertz broadband mimo communications with leaky wave antenna arrays |
| topic | Leaky-wave antenna (LWA) communications array MIMO spatial multiplexing OFDM |
| url | https://ieeexplore.ieee.org/document/10922200/ |
| work_keys_str_mv | AT albertdiezcomas enablingsubterahertzbroadbandmimocommunicationswithleakywaveantennaarrays AT duschiambodet enablingsubterahertzbroadbandmimocommunicationswithleakywaveantennaarrays AT josepmjornet enablingsubterahertzbroadbandmimocommunicationswithleakywaveantennaarrays |