Evaluation of metal coating techniques up to 66 GHz and their application to additively manufactured bandpass filters

Feuray, William; Delage, Anthony; Abdelghani, Aymen; Sence, Johann; Tantot, Olivier; Bila, Stéphane; Frigui, Kamel; Baillargeat, Dominique; Verdeyme, Serge; Delhote, Nicolas; Staelens, Koen

doi:10.23919/eumc.2017.8230902

Cited by 7 publications

(3 citation statements)

References 4 publications

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“…The silver coating has a thickness of 2.5 µm which is approximately 7 times the skin depth for the minimum operating frequency. According to [32], the average roughness produced in this metallization process is 2 µm which reduces the conductivity achieved by the silver. This decrease in the conductivity is almost negligible since it maintains the conductivity around 3•10 7 S/m.…”

Section: Fabrication Measurements and Discussionmentioning

confidence: 99%

Wideband 3-D-Printed Metal-Only Reflectarray for Controlling Orthogonal Linear Polarizations

Palomares‐Caballero

Molero

Padilla

et al. 2023

IEEE Trans. Antennas Propagat.

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This paper presents a metal-only reflectarray that enables the control of incident orthogonal polarizations in a large bandwidth. The proposed reflectarray is based on a unit cell whose tuning elements allow the independent control of the reflection phase value for the vertical and horizontal impinging polarizations. Due to the symmetry of the unit cell, the same performance is produced by each polarization when its reflection phase response is modified. The proposed unit cell provides a fairly linear phase response along the frequency with a phase variation in the orthogonal polarization of ±1 o . The performance under oblique incidence and the frequency limitation of the unit cell are also investigated. From this unit cell, a metal-only reflectarray that produces circular polarization from a linear polarization is designed. The reflectarray presents a simulated directivity greater than 27 dBi with an axial ratio below 1.5 dB from 32 GHz to 50 GHz (43.9% of bandwidth). A prototype is fabricated and the measured results agree well with the simulated ones. The obtained aperture efficiency is between 56% and 41% in the considered frequency band. The measured realized gain ranges from 27 dBi to 30.3 dBi where the achieved radiation efficiency is greater than 97%.

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Section: Fabrication Measurements and Discussionmentioning

confidence: 99%

Wideband 3-D-Printed Metal-Only Reflectarray for Controlling Orthogonal Linear Polarizations

Palomares‐Caballero

Molero

Padilla

et al. 2023

IEEE Trans. Antennas Propagat.

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show abstract

“…As seen, within the working bands, the magnitude values are practically 0 dB, which ensures high radiation efficiency. It should be considered that the simulations have been carried out using aluminum, with a conductivity of 3.56 • 10 7 S/m, close to that obtained through the metallization process [22].…”

Section: B Phase Responsementioning

confidence: 92%

“…1 depicts a view of both unit cells, describing the aforementioned resonator shapes and the main dimensions that will be used throughout the design process. The two prototypes to be studied in this work will operate in the bands of [18][19][20][21][22][23][24][25][26][27] GHz (for ∆-shaped) and [17.5-26.5] GHz (for O-shaped).…”

Section: A Unit Cell Geometrymentioning

confidence: 99%

Metal-Only 3D Reflectarray with Dual-Band Operation

Pérez-Escribano,

Biedma-Pérez,

Parellada-Serrano

et al. 2024

Preprint

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This paper presents a metal-only reflectarray based on a 3D unit cell with dual-band capability. The 3D unit cell is a square waveguide whose vertical walls include resonator elements with independent frequency performance. Different resonator geometries are analyzed to obtain a reflected phase variation in the target frequency band and to be feasible for 3-D manufacturing. C-shaped, triangle-shaped, and circle-shaped resonators are selected to obtain the required phase shift in reflection. Two reflectarray (RA) prototypes are designed, including pairs of these resonators where the C-shaped resonator controls the low-frequency band, and the circle and triangle resonators do so for the high-frequency band. The main reflected beam directions for each frequency band are different to show the independent phase tuning of the resonators. The prototypes are manufactured using stereolithography (SLA) with a subsequent silver coating. Measured results show realized gains of 21 dBi in the 18 GHz band and 24 dBi in the 26.5 GHz band, with a high radiation efficiency and good agreement with the simulated results.

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Tunable Filtering Devices in Satellite Payloads: A Review of Recent Advanced Fabrication Technologies and Designs of Tunable Cavity Filters and Multiplexers Using Mechanical Actuation

et al. 2020

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Evaluation of metal coating techniques up to 66 GHz and their application to additively manufactured bandpass filters

Cited by 7 publications

References 4 publications

Wideband 3-D-Printed Metal-Only Reflectarray for Controlling Orthogonal Linear Polarizations

Wideband 3-D-Printed Metal-Only Reflectarray for Controlling Orthogonal Linear Polarizations

Metal-Only 3D Reflectarray with Dual-Band Operation

Tunable Filtering Devices in Satellite Payloads: A Review of Recent Advanced Fabrication Technologies and Designs of Tunable Cavity Filters and Multiplexers Using Mechanical Actuation

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