A Benchmark for the Number of Independent Line of Sight Links on a Given Volume Platform

Riccardo Ozzola; Daniele Cavallo; Angelo Freni; Nuria Llombart; Andrea Neto

doi:10.1109/TAP.2022.3209203

A Benchmark for the Number of Independent Line of Sight Links on a Given Volume Platform

Riccardo Ozzola, Daniele Cavallo, Angelo Freni, Nuria Llombart, Andrea Neto

Tera-Hertz Sensing

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Abstract

The number of independent links that can be hosted by an antenna platform for Line-of-Sight (LoS) communications is limited by its physical size and the interference between the beams associated with different users. For large-size platforms, the interference can be reduced by compromising the aperture efficiency, and this trade-off is the metric to quantify the effective use of the platform. This metric fails for antenna platforms that are not electrically large, for which the aperture efficiency is no longer a useful parameter. Here we resort to the concept of the Observable Field, related to the maximum theoretical directivity, to estimate the potential number of independent links supported by moderate-size platforms. This allows the introduction of coupling coefficients between the beams associated with the observable portion of the incident field and the beams associated with the receiving antennas. These coefficients are bounded to unity for any platform dimension, unlike the aperture efficiency, and they are maximized when the antenna pattern is equal to the pattern predicted by the Observable Field. Accordingly, selecting beams dictated by the Observable Field constitutes a benchmark for the effective use of the volume. Any antenna design can be compared to this benchmark to assess its merits.

Original language	English
Pages (from-to)	12071-12080
Number of pages	10
Journal	IEEE Transactions on Antennas and Propagation
Volume	70
Issue number	12
DOIs	https://doi.org/10.1109/TAP.2022.3209203
Publication status	Published - 2022

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.

Keywords

interference
line of sight
Measurement
multi-beam antennas
observable field
Receiving antennas
signal-to-interference ratio

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A_Benchmark_for_the_Number_of_Independent_Line_of_Sight_Links_on_a_Given_Volume_PlatformFinal published version, 2.63 MB

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title = "A Benchmark for the Number of Independent Line of Sight Links on a Given Volume Platform",

abstract = "The number of independent links that can be hosted by an antenna platform for Line-of-Sight (LoS) communications is limited by its physical size and the interference between the beams associated with different users. For large-size platforms, the interference can be reduced by compromising the aperture efficiency, and this trade-off is the metric to quantify the effective use of the platform. This metric fails for antenna platforms that are not electrically large, for which the aperture efficiency is no longer a useful parameter. Here we resort to the concept of the Observable Field, related to the maximum theoretical directivity, to estimate the potential number of independent links supported by moderate-size platforms. This allows the introduction of coupling coefficients between the beams associated with the observable portion of the incident field and the beams associated with the receiving antennas. These coefficients are bounded to unity for any platform dimension, unlike the aperture efficiency, and they are maximized when the antenna pattern is equal to the pattern predicted by the Observable Field. Accordingly, selecting beams dictated by the Observable Field constitutes a benchmark for the effective use of the volume. Any antenna design can be compared to this benchmark to assess its merits.",

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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.",

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A Benchmark for the Number of Independent Line of Sight Links on a Given Volume Platform

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Keywords

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