Development of monoblock TM dielectric resonator filters with additive manufacturing

Carceller, Carlos; Gentili, Fabrizio; Reichartzeder, Dominik; Bösch, Wolfgang; Schwentenwein, Martin

doi:10.1049/iet-map.2016.1051

Cited by 10 publications

(3 citation statements)

References 21 publications

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“…An alternative is offered by the digital light processing (DLP) approach [21], [30]. The basic working principle is similar to stereolithography and visualized in Fig.…”

Section: Ceramic Additive Manufacturingmentioning

confidence: 99%

Ceramic Additive Manufactured Monolithic X-Shaped TM Dual-Mode Filter

et al. 2022

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This paper presents a monolithic 3D-printed ceramic X-shaped dual-mode microwave filter. The filter is manufactured utilizing a lithography-based ceramic manufacturing (LCM) process, allowing the realization of the resonator as well as the housing in one single piece. Therefore, contact as well as alignment problems, usually arising between a ceramic in T M mode operation and a metallic enclosure, can conveniently be avoided. A fourth order dual-mode filter with a designed center frequency of 6 GHz and a bandwidth of 279 MHz is realized in alumina material. Practical design rules to be considered in the filter layout process as well as limitations imposed by the LCM approach are discussed. The outer surface of the ceramic cavity is subsequently metallized using a silver spray-coating. Advantageously, the metallization is only a few micrometers thick, wherefore the weight of the component can be reduced. The measurement results are compared to the simulation and reveal good agreement. A temperature stability measurement shows a center frequency downward shift of 0.22%.INDEX TERMS 3D-printed ceramic filter, additive manufacturing, alumina 3D printing, dielectric TM dualmode filter, monolithic ceramic filter.

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“…An alternative is offered by the digital light processing (DLP) approach [21], [30]. The basic working principle is similar to stereolithography and visualized in Fig.…”

Section: Ceramic Additive Manufacturingmentioning

confidence: 99%

Ceramic Additive Manufactured Monolithic X-Shaped TM Dual-Mode Filter

et al. 2022

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“…There are very few works in literature regarding the manufacturing of filters with this technology. In [185] and [186] authors designed and manufactured a TM monolithic filter. This filter is made of two cavities that are not accessible for the metallization.…”

Section: ) Am Of Ceramic Filtersmentioning

confidence: 99%

Emerging Trends in Techniques and Technology as Applied to Filter Design

et al. 2021

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In the last decade, the filter community has innovated both design techniques and the technology used for practical implementation. In design, the philosophy has become "if you can't avoid it, use it", a very practical engineering approach. Modes previously deemed spurious are intentionally used to create in-line networks incorporating real or imaginary transmission zeros and also reduce the number of components and thus further miniaturize; spurious responses are re-routed to increase the passband width or stopband width, frequency variation in couplings is used to create complex transfer functions, with all of these developments using what was previously avoided. Clever implementations of baluns into passive and active networks is resulting in a new generation of noise-immune filters for 5G and beyond. Finally, the use of a diakoptic approach to synthesis has appeared an evolving approach in which small blocks ("singlets", "doublets", etc.) are cascaded to implement larger networks, (reducing the need for very complex synthesis), with this new approach promising a large impact on the implementation of practical structures. Filter technology has migrated towards "observe it and then adapt it", pragmatically repurposing tools not specifically originally intended for the applications. Combinations of surface wave and bulk wave resonators with L-C networks are improving the loss characteristics of filters in the region below 2 GHz. Lightweight alloys and other materials designed for spacecraft are being used in filters intended for space, to provide temperature stability without the use of heavy alloys such as Invar. Fully-enclosed waveguide is being replaced in some cases by planar and quasiplanar structures propagating quasi-waveguide modes. This is generically referred to as SIW (Substrate Integrated Waveguide). Active filters trade noise figure for insertion loss but perhaps will offer advantage in terms of size and chip-level implementation. Finally, the era of reconfiguration might be approaching, as the basic networks are evolving, perhaps lacking only the appearance of lower-loss, higher-IP solid-state tuning elements.

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“…However, they are based on open-ended waveguides that can be readily manufactured as single monolithic blocks. Monolithic lithography-based ceramic manufacturing techniques have also been proposed for the fabrication of dielectric resonator filters [34][35][36][37]. Nevertheless, the operation of this type of filters does not require the metallization of inner filter surface.…”

Section: Introductionmentioning

confidence: 99%

Monolithically-integrated 3D printed coaxial bandpass filters and RF diplexers: single-band and dual-band

Zhao

Psychogiou

2021

Int. J. Microw. Wireless Technol.

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The manuscript reports on additively-manufactured (AM) coaxial-resonator-based bandpass filters (BPFs) and RF diplexers. A monolithic integration concept using stereolithography apparatus (SLA) is proposed and discussed in detail. Coupled-resonator-based synthesis alongside full-electromagnetic-based design methods is used for the design of the monolithic filters and RF diplexers. In particular, the paper discusses a new external coupling mechanism for dual-band BPFs that allow to independently control the coupling in each of the BPF passbands. Furthermore, a novel coaxial transmission line-type T-junction is proposed for the design of single- and dual-band RF diplexers. For practical validation purposes, multiple BPF and RF diplexer prototypes were designed, manufactured and tested at S- and C-band demonstrating the applicability of the proposed concept to low-cost, low-loss and low-weight RF components with complex geometrical features.

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Development of monoblock TM dielectric resonator filters with additive manufacturing

Cited by 10 publications

References 21 publications

Ceramic Additive Manufactured Monolithic X-Shaped TM Dual-Mode Filter

Ceramic Additive Manufactured Monolithic X-Shaped TM Dual-Mode Filter

Emerging Trends in Techniques and Technology as Applied to Filter Design

Monolithically-integrated 3D printed coaxial bandpass filters and RF diplexers: single-band and dual-band

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