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The Design of Cavity Resonators and Microwave Filters Applying Shape Deformation Techniques

Abstract

This article introduces shape deformation as a new approach to the computer-aided design (CAD) of high-frequency components. We show that geometry deformation opens up new design possibilities and offers additional degrees of freedom in the 3-D modeling of microwave structures. Such design flexibility is highly desirable if the full potential of additive manufacturing (AM) is to be exploited in the fabrication of RF and microwave devices. The use of deformation techniques in the design of high-frequency components allows the attainment of improved electrical parameters, such as high-quality factors for cavity resonators and wide higher-order mode separation. In this work, shape deformation with radial basis functions (RBFs) is integrated with an electromagnetic field simulator based on the 3-D finite-element method (FEM), allowing the semiautomated optimization of microwave components, such as cavity resonators and filters. The proposed strategy is used for the design of high Q-factor cavity resonators, cavity bandpass filters with improved spurious mode separation, and a compact twisted waveguide filter. Three designs of waveguide cavity filters with complex geometry are experimentally verified using 3-D-printed prototypes fabricated with selective laser melting (SLM) technology

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DOI:
Digital Object Identifier (open in new tab) 10.34808/bvn6-6f92
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Creative Commons: CC-BY open in new tab

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Details

Category:
Articles
Type:
artykuły w czasopismach
Published in:
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES no. 71, pages 3065 - 3074,
ISSN: 0018-9480
Language:
English
Publication year:
2023
Bibliographic description:
Baranowski M., Balewski Ł., Lamęcki A., Mrozowski M., Galdeano J.: The Design of Cavity Resonators and Microwave Filters Applying Shape Deformation Techniques// IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES -Vol. 71,iss. 7 (2023), s.3065-3074
DOI:
Digital Object Identifier (open in new tab) 10.1109/tmtt.2023.3239363
Sources of funding:
Verified by:
Gdańsk University of Technology

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