Ceramic additive manufacturing as an alternative for the development of miniaturized microwave filters

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

doi:10.1109/imws-amp.2017.8247373

Cited by 11 publications

(5 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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

View full text Add to dashboard Cite

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.

show abstract

Section: ) Am Of Ceramic Filtersmentioning

confidence: 99%

Emerging Trends in Techniques and Technology as Applied to Filter Design

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Especially T M mode filters might benefit from this approach as alignment issues between a ceramic rod and the housing as well as thermal contact problems can be avoided. Based on AM, second order T M mode filters were already realized in [20]- [22], where a metallic paint is applied to the exterior of the cavity housing. Similar studies are accomplished in [23].…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2022

View full text Add to dashboard Cite

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.

show abstract

“…Examples of various TM single and dual-mode printed filters are provided in [13]- [15]. Metallisation and manufacturing tolerances proved challenging in [13], [14]. In reference [15], more success was achieved by the inclusion of a metal mask/backplate on which the tuning elements could be attached so that the manufacturing defects could be more easily compensated.…”

Section: Introductionmentioning

confidence: 99%

3D-Printed Dielectric Resonators for Quasi-TE112 Mode Singlets, Doublets and Dual-Mode Filters

et al. 2022

View full text Add to dashboard Cite

This paper demonstrates the use of a ceramic-based stereolithography additive manufacturing process in the fabrication of higher-order mode dielectric resonators. In this work, dielectric resonators with concentric disks around a combline rod structure are 3D-printed using alumina. The integration of the concentric disks for use of the TE 112 mode allows for a more compact cavity structure and a higher unloaded quality factor when compared to a simple dielectric combline resonator with a similar S-parameter response. The achievable improvements in quality factor for the TE 112 -mode resonators utilising concentric disks are compared through simulations and experimental results. The measured results demonstrate an increased average in the unloaded quality factor of Q u ≈ 2172 which is approximately 44%. Additionally, the application of the 3D-printed resonators is further demonstrated in a TE 112 singlet, doublet, and dualmode filter configuration.

show abstract

Ceramic additive manufacturing as an alternative for the development of miniaturized microwave filters

Cited by 11 publications

References 6 publications

Emerging Trends in Techniques and Technology as Applied to Filter Design

Emerging Trends in Techniques and Technology as Applied to Filter Design

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

3D-Printed Dielectric Resonators for Quasi-TE112 Mode Singlets, Doublets and Dual-Mode Filters

Contact Info

Product

Resources

About