Continuously Tuned Ku-Band Cavity Filter Based on Dielectric Perturbers Made by Ceramic Additive Manufacturing for Space Applications

Perigaud, Aurélien; Tantot, Olivier; Delhote, Nicolas; Verdeyme, Serge; Bila, Stéphane; Pacaud, Damien; Carpentier, Ludovic; Puech, J.; Lapierre, L.; Carayon, G.

doi:10.1109/jproc.2017.2663104

Cited by 28 publications

(7 citation statements)

References 23 publications

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“…For instance, Ref. [24] manufactured a dielectric perturber for a third-order filter with a bandpass shifting from 10 to 12 GHz. The filter was manufactured using copper with a standard manufacturing process, while the perturber was manufactured by SLA using zirconia (εr = 32, tan δ = 0.002).…”

Section: Waveguide Filtersmentioning

confidence: 99%

Additive Manufacturing of RF Waveguide Components

Lumia¹,

Addamo²,

Peverini³

et al. 2022

Recent Microwave Technologies

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The exponential growth of publications, in the last years, on the use of additive manufacturing (AM) technologies in the microwave field proves the increasing interest of research institutions and industries in these techniques. Some advantages of AM with respect to conventional machining are weight reduction, design flexibility, and integration of different functionalities (electromagnetic, thermal, and structural) in a single part. This chapter presents the most employed AM technologies for the manufacturing of RF waveguide components. First, an overview of the AM processes is discussed with particular care on material properties and post-processing. Then, an extensive survey on microwave-guided components fabricated by AM processes published in literature is shown.

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Section: Waveguide Filtersmentioning

confidence: 99%

Additive Manufacturing of RF Waveguide Components

Lumia¹,

Addamo²,

Peverini³

et al. 2022

Recent Microwave Technologies

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“…In [187] a monolithic dielectric rod of zirconia shared among several adjacent cavities has been used in the design of TE01δ filters with wide bandwidth. In [188] a dielectric inserted into a cavity is used to tune the cavity resonance frequency for obtaining continuously tuned Ku-Band filters. The dielectric shape is designed so that a controlled rotation of the dielectric provokes a controlled resonance frequency shift.…”

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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“…As the tunable filter response is cascaded with the input bandpass filter (11.8-12 GHz), there is no need to control the matching level for frequencies lower than 11.8 GHz. However, it should be possible to use inserts inside the coupling irises [7] or optimize the perturber shape to obtain a stable coupling factor over the translation [19]. However, the first solution requires the implementation of additional control commands and associates stepped motors, whereas the second one leads to complex shapes that are hard to obtain using CNC machining at reasonable fabrication costs.…”

Section: Tunable Filter Designmentioning

confidence: 99%

Reconfigurable diplexer using hybrid couplers and perturbed TE₀₁₂ cavities

Laplanche

Tantot

Delhote

et al. 2021

Int. J. Microw. Wireless Technol.

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A continuously tunable Ku-band waveguide diplexer is proposed in this paper. This diplexer is based on a hybrid coupler topology and is composed of an input filter centered at 11.9 GHz with a 200 MHz bandwidth, a pair of ladder-type hybrid couplers, and a pair of tunable filters. This diplexer can provide two bandpass channels (channels 1 and 2) that can continuously go from a state where the bandwidths of channels 1 and 2 are maximum (up to 140 MHz) and minimum (down to 40 MHz), respectively, to another configuration where the bandwidth of channel 1 is the largest and the bandwidth of channel 2 is the narrowest. We propose a tunable filter based on TE012 mode circular cavities that are perturbed by low-loss dielectric inserts to obtain such performance. The resonant frequency of these cavities can be continuously tuned between 11.8 and 12 GHz due to the linear movement of the dielectric perturber. The design process for these components is presented and a breadboard device has been manufactured and measured to prove the concept. Different measured configurations of the diplexer are demonstrated, showing that the 200 MHz operating bandpass between 11.8 and 12 GHz can be efficiently separated into two tunable channels. The measured bandwidth of channels 1 and 2 in the manufactured diplexer can be tuned from 135 to 40 MHz (and vice versa) while maintaining an average guard band between the channels of approximately 26 ± 7 MHz. The obtained bandwidth tuning ratios are 3.2 for the highest channel and 3.1 for the lowest channel.

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Continuously Tuned Ku-Band Cavity Filter Based on Dielectric Perturbers Made by Ceramic Additive Manufacturing for Space Applications

Cited by 28 publications

References 23 publications

Additive Manufacturing of RF Waveguide Components

Additive Manufacturing of RF Waveguide Components

Emerging Trends in Techniques and Technology as Applied to Filter Design

Reconfigurable diplexer using hybrid couplers and perturbed TE₀₁₂ cavities

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Continuously Tuned Ku-Band Cavity Filter Based on Dielectric Perturbers Made by Ceramic Additive Manufacturing for Space Applications

Cited by 28 publications

References 23 publications

Additive Manufacturing of RF Waveguide Components

Additive Manufacturing of RF Waveguide Components

Emerging Trends in Techniques and Technology as Applied to Filter Design

Reconfigurable diplexer using hybrid couplers and perturbed TE012 cavities

Contact Info

Product

Resources

About

Reconfigurable diplexer using hybrid couplers and perturbed TE₀₁₂ cavities