Space Qualification of Metalized Additive Manufactured Filters

Bachiller, C.; Nova, Vicente; Ferrer, Álvaro; Boria, Vicente E.

doi:10.1109/access.2022.3205408

Cited by 3 publications

(2 citation statements)

References 21 publications

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“…The latter are mainly related to dimensional accuracy and surface electrical resistivity of the manufactured parts. To assess all these aspects, several feasibility studies have been carried out throughout the past years, some results of which are summarized in [41], [42], [43], [44], [45], [46].…”

Section: D-printed Components and Rf Front-ends For Space A Stand-alo...mentioning

confidence: 99%

How 3D-Printing Is Changing RF Front-End Design for Space Applications

et al. 2023

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3D-printing is leading to a major transformation in many industrial and application sectors, ranging from medical to aerospace. In the space sector, 3D-printing has firstly been adopted for the development of structural and thermal parts, such as brackets and heat pipes. In more recent years, thanks to improvements in precision and surface roughness, 3D-printing technologies have steadily been investigated also for the development of radio frequency components and advanced payloads. Indeed, the unique features of 3D-printing, including the free-form capability and the ease for customization, make these manufacturing technologies very appealing in the development of complex radio-frequency front-ends for space applications, including New Space constellations and next generation software-defined communication satellites. They also enable a drastic simplification of mechanical designs by reducing the number of interfaces and assembling screws of large radio-frequency front-ends, thus leading to significant mass savings and higher integration. This paper briefly reports on recent advances in 3D-printing that have been carried out according to the current trends in radio-frequency front-ends for satellite communications.

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Section: D-printed Components and Rf Front-ends For Space A Stand-alo...mentioning

confidence: 99%

How 3D-Printing Is Changing RF Front-End Design for Space Applications

et al. 2023

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“…From the designer's point of view, and related to the physical phenomena that may limit the power handling capability (PHC) in RF filters [5] (or other microwave components), it is necessary to keep in mind the thermal effects [6], passive intermodulation (PIM) [7], multipactor breakdown [8], [9], [10] and corona discharge [11], [12], [13]. The latter, also commonly known as corona effect or gas breakdown, occurs if the surrounding gas molecules are ionized when the strength of the electric field is high enough.…”

Section: Introductionmentioning

confidence: 99%

In-Depth Study of the Corona Discharge Breakdown Thresholds in Groove Gap Waveguides and Enhancement Strategies for Inductive Bandpass Filters

et al. 2022

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This work focuses on the study of the corona discharge breakdown in groove gap waveguides (GGWs) and inductive bandpass filters (BPFs) based on this technology. With the main aim of improving the peak power handling capability (PPHC), the location of the maximum normalized electric field strength (| ÊMAX |) as a function of the geometrical parameters is analyzed. First, the research deals with wave-guiding structures, comparing the distribution of the transverse electric TE 10 -like mode of a GGW to that of an equivalent rectangular waveguide (RW). Next, a design strategy based on the adjustment of the geometrical dimensions of the bed of nails is proposed, thus achieving a considerable reduction of | ÊMAX |. The second part of this paper aims for vertically polarized GGW BPFs, where the inductive irises become the most critical part of the component. By a simple modification of their dimensions, a second design criterion is suggested for improving the PPHC. Finally, several Ku-band BPFs centered at 14 GHz and 16 GHz have been manufactured and experimentally verified at the European High-Power Radiofrequency Space Laboratory. This measurement campaign shows peak power thresholds up to 1.09 kW and 3.59 kW at 600 mbar for the non-and full-optimized GGW BPFs, respectively, thereby demonstrating a PPHC enhancement up to 5.16 dB in the high-pressure range when both strategies, proposed in this work, are used.INDEX TERMS Corona breakdown, gas discharge, groove gap waveguides, microwave bandpass filters, peak power handling capability (PPHC), power applications, voltage magnification.

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Influence of yttrium element on the crystallization performance of ZnSb alloy for phase change memory application

Fu,

Wu,

Zhang

et al. 2023

Eur. Phys. J. Appl. Phys.

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The crystallization behavior and electrical performance of Y-doped Zn15Sb85 phase change material were proposed and experimental examined. The relationship between the resistance and temperature reveals that the Y dopant is able to enhancing the thermal stability (Tc ~ 237°C, T10 ~ 169 °C) and resistivity (Ra ~ 105 Ω, Rc ~ 102 Ω) of Zn15Sb85 films, which are suitable for automobile design and surface mount technology. XRD results indicate that the Y dopant could effectively inhibit grain growth and reduce grain size. Meanwhile, XPS illustrates that Y is more likely to form bonds with Sb. Further, the resistance drift index and surface roughness become small after doping Y element, which is of great benefit to improving the reliability and electrical performance of the device. Moreover, T-shaped phase change memory cells based on Y0.36(Zn15Sb85)0.64 film were also built and analyzed. The characteristic of current − voltage (I-V) and resistance − voltage (R-V) prove that the SET and RESET operations can be achieved by electric induction, implying the excellent candidate of Y-doped Zn15Sb85 material for high thermal and high reliability application.

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Space Qualification of Metalized Additive Manufactured Filters

Cited by 3 publications

References 21 publications

How 3D-Printing Is Changing RF Front-End Design for Space Applications

How 3D-Printing Is Changing RF Front-End Design for Space Applications

In-Depth Study of the Corona Discharge Breakdown Thresholds in Groove Gap Waveguides and Enhancement Strategies for Inductive Bandpass Filters

Influence of yttrium element on the crystallization performance of ZnSb alloy for phase change memory application

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