Design of an additively-manufactured self-supported all-metal coaxial-line X-band bandpass filter
| dc.contributor.author | Pons Abenza, Alejandro | |
| dc.contributor.author | Arregui Padilla, Iván | |
| dc.contributor.author | Gómez Laso, Miguel Ángel | |
| dc.contributor.author | Lopetegui Beregaña, José María | |
| dc.contributor.author | Martín Iglesias, Petronilo | |
| dc.contributor.department | Ingeniería Eléctrica, Electrónica y de Comunicación | es_ES |
| dc.contributor.department | Ingeniaritza Elektrikoa, Elektronikoa eta Telekomunikazio Ingeniaritza | eu |
| dc.contributor.department | Institute of Smart Cities - ISC | en |
| dc.date.accessioned | 2024-07-15T18:19:49Z | |
| dc.date.available | 2024-07-15T18:19:49Z | |
| dc.date.issued | 2024 | |
| dc.date.updated | 2024-07-15T17:55:19Z | |
| dc.description.abstract | In this contribution, the design and manufacturing of an all-metal coaxial-line X-band bandpass filter is discussed. The device is 3D-printed as a self-supported structure without any dielectric inside the coaxial. The mechanical support between the inner and outer coaxial-line conductors is provided by means of λ/4 short-circuited stubs, which are also used in the bandpass filter design. The real transmission zeros (TZs) produced by the short-circuited stubs are responsible for a high filter selectivity. In order to enhance the filter performance, a second stage consisting in a coaxial-line stepped-impedance low-pass filter is integrated in the design to provide the rejection level required for the out-of-band behaviour. Following our design method, the bandpass and low-pass filters are designed separately, and a final matching step is performed to connect both and to achieve the aimed frequency specifications. In this way, a monoblock coaxial filter with very good in-band and out-of-band performance can by obtained by using an additive manufacturing (AM) procedure. Only the input/output (I/O) coaxial connectors will need to be assembled to the filter to perform the frequency measurements. The filters in this work can be seen as a first proposal towards more complex multi-functional monoblock structures using additively-manufactured coaxial technology, for highly-integrated RF chains. Other expected benefits beyond the compactness or lightweight are an increased RF shielding, electrostatic discharge risk reduction, and Passive Intermodulation (PIM) protection. In the paper, a prototype with a passband between 8 and 12 GHz is designed and manufactured, using a bandpass filter with three stubs and an integrated 15th-order low-pass filter, providing rejection for spurious frequencies up to 30 GHz. The filter is manufactured using Selective Laser Melting (SLM) and measurements show an excellent agreement with the simulations. | en |
| dc.description.sponsorship | This work was supported by the Spanish Ministerio de Ciencia e Innovación-Agencia Estatal de Investigación (MCIN/AEI/10.13039/501100011033) under Project PID2020-112545RB-C53. The work of Alejandro Pons-Abenza was supported by the Spanish Ministerio de Universidades under Margarita Salas Program | |
| dc.format.mimetype | application/pdf | en |
| dc.identifier.citation | Pons-Abenza, A., Arregui, I.,Laso, M. A. G., Lopetegi, T., Martin-Iglesias, P. (2024) Design of an additively-manufactured self-supported all-metal coaxial-line X-band bandpass filter. IEEE Access, 12, 68171-68183. https://doi.org/10.1109/ACCESS.2024.3399745. | |
| dc.identifier.doi | 10.1109/ACCESS.2024.3399745 | |
| dc.identifier.issn | 2169-3536 | |
| dc.identifier.uri | https://academica-e.unavarra.es/handle/2454/50285 | |
| dc.language.iso | eng | |
| dc.publisher | IEEE | |
| dc.relation.ispartof | IEEE Access 12, 2024, 68171-68183 | |
| dc.relation.projectID | info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-112545RB-C53/ES/ | |
| dc.relation.publisherversion | https://doi.org/10.1109/ACCESS.2024.3399745 | |
| dc.rights | © 2024 The Authors. This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License | |
| dc.rights.accessRights | info:eu-repo/semantics/openAccess | |
| dc.rights.uri | https://creativecommons.org/licenses/by-nc-nd/4.0/ | |
| dc.subject | Bandpass filter | en |
| dc.subject | Coaxial-line filter | en |
| dc.subject | Metal 3D-printing | en |
| dc.subject | Stepped-impedance filter | en |
| dc.title | Design of an additively-manufactured self-supported all-metal coaxial-line X-band bandpass filter | en |
| dc.type | info:eu-repo/semantics/article | |
| dc.type.version | info:eu-repo/semantics/publishedVersion | |
| dspace.entity.type | Publication | |
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