Additive Manufactured Bandpass Filters at Ka-band

Booth, Paul

doi:10.1109/imws-amp.2019.8880131

Cited by 8 publications

(9 citation statements)

References 11 publications

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“…All the filters present high rejection (50 dB) and low insertion losses (from 1 to 0.1 dB, depending on the type of surface finish). Another example can be seen in [11], where a bandpass filter with titled irises is presented. The design in the article is a 11pole filter operating from 17.3 to 20.2 GHz.…”

Section: Filtersmentioning

confidence: 99%

“…Another common practice in 3D-printed filters is the introduction of features in order to improve the performance (quality factor enhancement, extension of spurious-free band, etc). One example can be seen in [11], where a dimple has been created at the center of each cavity. Such feature has negligible impact on the insertion loss but pushes up the repeat band.…”

Section: Figurementioning

confidence: 99%

“…Neither the resulting manufacturing tolerances were optimal, nor the quality of the printed pieces. With time, as a result of collective efforts, it has been understood that the full benefit of this technique (i.e., short lead time, low cost, single piece prototyping, and high RF quality) implies a change of mindset in RF design [9][10][11][12][13]. As a result, today we are witnessing the most disruptive impact of 3Dprinting: the challenge of the bounds of our creativity and the need for new co-design guidelines.…”

Section: Introductionmentioning

confidence: 99%

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Metal 3D-Printing of Waveguide Components and Antennas: Guidelines and New Perspectives

Garcia-Vigueras¹,

Polo‐López²,

Stoumpos³

et al. 2023

Hybrid Planar - 3D Waveguiding Technologies

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This chapter intends to show the strong potential brought by metal 3D-printing to the field of waveguide components and antennas. General co-design guidelines are firstly provided. These guidelines enable to benefit from the advantages associated to metal 3D-printing. The implementation of filters and ortho-mode transducers is considered, together with horns and slotted antennas. Finally, multifunctional periodic structures benefiting from metal 3D-printing are discussed.

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Section: Filtersmentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Metal 3D-Printing of Waveguide Components and Antennas: Guidelines and New Perspectives

Garcia-Vigueras¹,

Polo‐López²,

Stoumpos³

et al. 2023

Hybrid Planar - 3D Waveguiding Technologies

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show abstract

“…Although supports and oblique orientation were still needed to fabricate those filters, the authors recognized that the rounded shape of the filters made them easier to manufacture with SLM than conventional designs [12], [22]. Later, Booth [23] continued using rounded geometries, but proposing an AM-oriented design in the lines of [15] and [16], which can be fabricated aligning the filter propagation axis with the vertical building direction. Following this approach of using rounded surfaces and AM-oriented designs, lollypop-shaped resonators (spheres balanced on top of poles) have been proposed in [24] to implement stepped impedance resonators for bandpass filters.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Rectangular Waveguide Filters With Smooth Profile Oriented to Direct Metal Additive Manufacturing

Percaz

Hussain

Arregui

et al. 2023

IEEE Trans. Microwave Theory Techn.

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In this article, a novel design method for rectangular waveguide filters intended for fabrication using direct metal additive manufacturing (AM) is proposed. The synthesized filters will feature a smooth profile that allows us to fabricate them orienting the filter propagation axis in the vertical building direction, achieving an optimum configuration for direct metal AM fabrication. The novel design method is valid for any all-pole transfer function, which is initially implemented with a commensurate-line distributed unit element prototype. The impulse response of that initial prototype is then properly interpolated to obtain the target response for a smooth-profiled filter with similar length and profile excursion. Finally, the target impulse response just generated is implemented in the rectangular waveguide technology employing a novel inverse scattering synthesis technique that relies on the coupled-mode theory to model the electromagnetic behavior of the waveguide filter. The novel inverse scattering synthesis technique is general and also valid for the case of filters with very high rejection levels, which is of great relevance in rectangular waveguide technology. A Ku-band low-pass filter with stringent satellite specifications is designed using the proposed method, fabricated by means of a direct metal AM technique, and measured with a vector network analyzer. A very good agreement is achieved between the simulated and measured results, fulfilling the required specifications and demonstrating the feasibility and performance of the novel design method.

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“…The state-of-the-art review shows that, in order to attain both high precision and high symmetry, the piece should be oriented in such a way that the main waveguide (WG) propagation axis is aligned with the building direction (the vertical axis) [1]. The WG devices that satisfy such condition can be regarded as vertically printable, and they must be carefully designed so that the internal surfaces [4], tilted irises [6], [8], or spherical resonators [7]. It should be noted that it is possible to 3-D-print monolithic components that are not vertically printable [11], [12].…”

Section: Introductionmentioning

confidence: 99%