A Study on mm-Wave Propagation in and Around Buildings

Possenti, L.; Barbiroli, Marina; Vitucci, Enrico M.; Fuschini, Franco; Fosci, Mattia; Degli-Esposti, Vittorio

doi:10.1109/ojap.2023.3297201

Cited by 3 publications

(1 citation statement)

References 21 publications

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“…The large-scale mm-wave arrays is an important research topic that has attracted tremendous attention over the past few years [1]. Since the mutual coupling between array elements seriously deteriorates the performance of the arrays, such as active VSWR, bandwidth, active reflection coefficient, efficiency, signal-to-interference noise ratio, and channel capacity [2]- [7], therefore, it is demanding to suppress the coupling of large-scale arrays.…”

Section: Introductionmentioning

confidence: 99%

Decoupling for Millimeter-Wave Array Antennas Using Near-Field Shrinking Dielectric Superstrate

Luo,

Zhang,

Mei

et al. 2023

IEEE Open J. Antennas Propag.

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A decoupling concept of near-field shrinking dielectric superstrate (NFSDS) is proposed for large-scale, wideband, and dual-polarized mm-wave arrays. An NFSDS with a thickness of 4 mm (0.32 λ0 at 24 GHz) is mounted seamlessly above the array, which shrinks the near field of the array elements to reduce the space wave coupling while slightly increasing the surface wave coupling of the arrays. By loading a superstrate with a certain thickness and low permittivity, the total coupling of the mm-wave arrays is reduced significantly. Periodic air holes are drilled through the superstrate to lower the NFSDS permittivity. An 8 × 8 mm-wave array is simulated, fabricated, and measured to verify the proposed decoupling concept. The simulated and measured coupling of the mm-wave array is reduced from -17 dB to lower than -23.2 dB from 24 -29.5 GHz and lower than -25 dB in most of the band, respectively. The radiation patterns of the array before and after decoupling almost keep unchanged. Moreover, the NFSDS can efficiently improve the array beam scanning capability. The measured results align well with the simulated.

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Section: Introductionmentioning

confidence: 99%

Decoupling for Millimeter-Wave Array Antennas Using Near-Field Shrinking Dielectric Superstrate

Luo,

Zhang,

Mei

et al. 2023

IEEE Open J. Antennas Propag.

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MIMO Channel Modeling for Tunnel Based on Directive Scattering Model and Ray Tracing

Sun,

Yi,

Liu

et al. 2024

International Journal of Antennas and Propagation

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In this paper, semideterministic multi‐input multi‐output (MIMO) channel modeling is proposed for a tunnel with two types of cross sections. To be more consistent with the MIMO propagation characteristics of the measured data, ray tracing (RT) is used to simulate the specular components (SCs) and a directed path channel modeling method based on directive scattering model (DSM) is used to simulate the diffuse components (DCs), which has an important contribution in MIMO channel capacity. The performance of the proposed model is compared in terms of delay domain, angle domain, and channel capacity. By analyzing the DSM and the propagation graph based on the Lambertian scattering model (LSM), it was demonstrated that the proposed method is more suitable in terms of comprehensive performance.

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