A Compact Absorbing FSS Structure for Antenna Decoupling in the 5G 3.5GHz Band

Merzaki, Faissal; Sergolle, Maëlle; Castel, Xavier; Himdi, M.; Besnier, Philippe; Desmars, K.; Thierry, Levavasseur,; Patrick, Caldamone,; Parneix, Patrick

doi:10.1109/emceurope48519.2020.9245649

Cited by 2 publications

(3 citation statements)

References 8 publications

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“…1 resistive ribbons) as developed in [25]. Our proposed TZZ inv (in series association of transformed Z-shaped and inverted Z-shaped resistive ribbons), structure initially presented in [26], is then presented in Fig. 1(b).…”

Section: Fss Absorber Unit Cell Designmentioning

confidence: 92%

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A Compact Double-Sided FSS Absorbing Wall for Decoupling 5G Antenna Arrays

Merzaki

Besnier

Himdi

et al. 2022

IEEE Trans. Electromagn. Compat.

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The fifth generation (5G) of mobile communications gives birth to the evolution of the base stations. They progressively include arrays of antennas in the sub-6 GHz frequency band worldwide. Moreover, 5G takes advantage of the beamforming capabilities to gain power efficiency and higher throughputs. Within this framework, achieving high decoupling performance between any pairs of antennas and compactness at the same time become a major challenge. The present paper describes an advanced solution based on the interposition of a thin and low-profile absorbing wall operating in the 3.4-3.6 GHz frequency band. The absorption is provided by a frequency selective surface whose elementary pattern size is first optimized. Then, the compact absorbing wall that associates back-to-back pieces of absorber is interposed between elements of an antenna array. Moreover, the fabrication of both antenna array and decoupling device involve lightweight and low-cost composite technology. The results show that such a compact decoupling device achieves excellent decoupling capabilities while keeping up the antenna array performance.

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Section: Fss Absorber Unit Cell Designmentioning

confidence: 92%

“…This pattern restricts the meandering of strip lines for outmost ones, where it is the more relevant. A preliminary analysis of the candidate FSS structure was proposed in [26] and its operation and performance are further analyzed in details. The resistive surface of the decoupling device was fabricated using a screen-printing process with a home-made ink.…”

mentioning

confidence: 99%

A Compact Double-Sided FSS Absorbing Wall for Decoupling 5G Antenna Arrays

Merzaki

Besnier

Himdi

et al. 2022

IEEE Trans. Electromagn. Compat.

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show abstract

“…In recent years, significant attention has been paid to mitigating mutual coupling interference in a multiple antenna system [1,3,[7][8][9][10]. For this purpose, many decoupling techniques have been proposed: decoupling networks [9,[11][12][13], neutralization lines [2,14], parasitic resonant elements [15], defected ground structures [16], pattern diversity [1,17], metamaterials [18][19][20][21][22] and others [10,23,24]. Although these methods can effectively suppress surface wave propagation and achieve high isolation between antennas, most are antenna-dependent, related to single-band applications and come with some constraints and complexity [9].…”

Section: Introductionmentioning

confidence: 99%

Low-Profile FSS Design Methodology to Increase Isolation between Vehicle-Borne Multifrequency Antennas

et al. 2023

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The present work describes a new approach for the design of a Frequency-Selective Surface (FSS) in the context of frequency filters to increase isolation between two vehicle-borne antennas. A compact FSS design based on nested square meandered resonators is optimized for multifrequency operation. Furthermore, a design workflow is proposed. In general, the measurement of low-profile FSS does not correspond to simulation through Floquet modes based on periodic boundary conditions due to the lack of uniformity of mutual coupling among the FSS unit cells. The proposed method demonstrates the agreement between the infinite simulation and the measurement of the finite prototype once a convenient scale factor is applied, which facilitates the design workflow. In this case, an FSS is used as an efficient filter to increase the isolation between antennas by 6 dB in three representative bands (3GPP, WiFI I and II). In this way, multifrequency antennas can be placed at approximately half their actual distance with the same performance in spatial-constrained vehicular environments.

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A Compact Absorbing FSS Structure for Antenna Decoupling in the 5G 3.5GHz Band

Cited by 2 publications

References 8 publications

A Compact Double-Sided FSS Absorbing Wall for Decoupling 5G Antenna Arrays

A Compact Double-Sided FSS Absorbing Wall for Decoupling 5G Antenna Arrays

Low-Profile FSS Design Methodology to Increase Isolation between Vehicle-Borne Multifrequency Antennas

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