Antenna Solutions for 4G Smartphones in Laser Direct Structuring Technology

Sonnerat, Florence; Gloria, D.; Gianesello, Frédéric; Cihangir, Aykut; Luxey, Cyril

doi:10.13164/re.2016.0419

Cited by 7 publications

(2 citation statements)

References 14 publications

(18 reference statements)

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“…This leads to an electronic board size reduction, thus an overall size reduction of the product. Among all the plastronics technologies, Laser Direct Structuring offers promising results for IoT developments [6][7][8]. Indeed, considering the aim to produce a serial antenna, the Laser Direct Structuring (LDS) process offers both sufficient flexibility in the prototyping phase and convenient integration of the different stages in a single industrialization process.…”

Section: Introductionmentioning

confidence: 99%

Plastronic Circular Line Matched Dipole Antenna

Bengloan¹,

Chousseaud²,

Froppier³

et al. 2021

PIER Letters

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A compact 3-D, circular line matched dipole (CLMD) antenna is presented in this paper. The realization of the antenna is based on Laser Direct Structuring (LDS) plastronic technology, enabling metallization on plastic parts. Cylindrical holder is chosen to carry the dipole, which implies high bending constraints on the antenna. Miniaturization of the radiating element is obtained by an effective use of 3-D space, resulting in a very low profile length dimensions of 0.14λ × 0.14λ × 0.05λ operating at 868 MHz. Specific attention is paid to the input impedance change due to conformation. An equivalent circuit model is proposed to take into account the conformation and design the matching line. Both simulated and measured results demonstrate good performances, with a 30 MHz bandwidth (i.e., a relative bandwidth of 3.5% with S 11 < −10 dB) around the working frequency. The LDS prototype achieves a maximum gain of 1.2 dBi with a quasi-omnidirectional radiation pattern. This compact and conformal design presents a real interest for pervasive highly integrated ISM band IoT sensors.

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Section: Introductionmentioning

confidence: 99%

Plastronic Circular Line Matched Dipole Antenna

Bengloan¹,

Chousseaud²,

Froppier³

et al. 2021

PIER Letters

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“…In particular, the generation of a regular nanoscale pattern in LIPSS has a variety of applications in the surface engineering and treatment [2][3][4][5][6][7]. However, different from conventional LIPSS with a regular structural pattern like grating, unconventional surface structures with non-centrosymmetric pattern have anisotropic surface properties, which have potential applications in the microfluid devices [10,11], plasmonic devices [12,13] and radio frequency antenna [14,15]. Given the promising applications in microfluid devices, we investigated the fabrication of unconventional LIPSS for unidirectional droplet micro-displacement.…”

Section: Introductionmentioning

confidence: 99%

Femtosecond laser-induced non-centrosymmetric surface microstructures on bulk metallic glass for unidirectional droplet micro-displacement

Li¹,

Liu²,

Xue-ping³

et al. 2019

J. Phys. D: Appl. Phys.

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Unidirectional droplet motion without energy input has attracted considerable attention in various potential applications. We report on the fabrication of unconventional laser-induced periodic surface structures (LIPSS) for unidirectional droplet micro-displacement by a femtosecond laser at a large incident angle. In order to overcome the mechanical durability of the existing soft materials such as PDMS for controlling the droplet, Zr-based bulk metallic glass (Zr-BMG) is used to fabricate the typical non-centrosymmetric unconventional LIPSS, which include micro-sized elliptical arc-shaped structures and nano-ripples with the central spatial periodicity of 400 nm. The spots and the grating of unconventional LIPSS on Zr-BMG are fabricated to construct the functional surface structures by femtosecond laser irradiation. The unidirectional micro-displacement of water droplet on Zr-BMG was achieved using functional surface structures. For better understanding the fabrication of unconventional LIPSS, the underlying formation mechanism was revealed by numerical simulations. This work gives a fast, precise and low-cost method to fabricate the non-centrosymmetric surface micro/nano-structures on metal materials for unidirectional droplet motion in microfluidics.

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