Helical resonator with modulated radius for improved multipactor threshold: Numerical and experimental results

Salza, Giuseppe; Goussetis, George; Vicente, C.; Reglero, Marta; Taroncher, M.; Boria, Vicente E.; Sidiropoulos, Nikolas; Galdeano, Jaione; Guglielmi, M.; Doumanis, Efstratios; Kosmopoulos, S.A.

doi:10.1109/eumc.2016.7824321

Cited by 4 publications

(4 citation statements)

References 4 publications

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“…resonant post [10], [11] are often deployed to reduce resonator profile, albeit at the expense of performance. Helical resonators, [12]- [14] can also be used to address the issue of bulky size.…”

Section: Introductionmentioning

confidence: 99%

Low-Profile and Low-Volume Split-Distributed Resonators and Filters

Bulja

Kozlov

2020

IEEE Access

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A new class of low-profile resonators, named split-distributed resonators is introduced in this paper. The newly proposed resonator family features high quality Q-factors and relies not only on the coupling among the constituent resonant elements, but the constituent elements themselves are also made in the distributed form. This, in comparison with the standard distributed resonator, caters for extremely low profiles, while allowing for a more uniform distribution of the electromagnetic fields inside the resonant cavity and hence higher unloaded quality factors. Furthermore, a uniform distribution of the electromagnetic fields facilitates a tremendous reduction of the resonator volume. As an experimental verification, two 5-pole band-pass filters using different realizations of individual resonant elements are designed and fabricated. The filters operate at a centre frequency of 1.8 GHz with a percentage bandwidth of 2%. The individual splitdistributed resonator of these filters consists of 9 resonant elements, where each element is a distributed resonator of the second order and fourth order respectively. The measured insertion losses of the filters are in a good agreement with the values predicted by the simulations.

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Section: Introductionmentioning

confidence: 99%

Low-Profile and Low-Volume Split-Distributed Resonators and Filters

Bulja

Kozlov

2020

IEEE Access

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“…Helical resonator filters bring significant advantages for very highfrequency (VHF) and ultra-high-frequency spaceborne applications, due to the favourable trade-off between mass/volume and Q-factor that they offer [1][2][3][4]. Despite these benefits, they suffer from power handling limitations, which can lead to major consequences including even the loss of a satellite [5].…”

Section: Introductionmentioning

confidence: 99%

Helical resonator filters with improved multipactor performance exploiting rigorous modelling and the large gap approach

Salza

Goussetis

Vicente

et al. 2019

IET Microwaves, Antennas & Propagation

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The power handling capability of helical resonator filters is studied by means of the parallel plate model (employed in the European Cooperation for Space Standardisation) and more rigorous modelling techniques (like the one available in the commercial software tool SPARK3D™) as well as through an experimental test campaign. The results indicate that the parallel plate model provides conservative power handling capabilities for this class of filters, while rigorous modelling can better capture the impact of the geometrical features on multipactor evolution. Although the accuracy of the estimated power handling depends on the knowledge of the practical secondary emission yield values, the use of such rigorous modelling tools enables the design of helical resonator filters with improved power handling capability by exploiting the large gap approach, therefore opening opportunities to avoid additional dielectric fillings.

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“…Helical resonator filters have widespread applications in communication systems operating in the VHF and UHF ranges [1]- [2]. Helical resonators are superior to resonators based on lumped elements, in terms of offering a higher unloaded quality factor (in the range of 500 to 2000) [3].…”

Section: Introductionmentioning

confidence: 99%

“…Such helix exhibits a higher quality factor and pushes the first spurious resonance to a higher frequency, whereas at the same time presents no additional difficulty in fabrication via 3-D printing. No helix with varying width has been reported in open literature, except for a quarter-wavelength helical filter designed for enhanced power handling capability [2]. II.…”

Section: Introductionmentioning

confidence: 99%

3-D printed filter based on helical resonators with variable width

Shang

Guo

et al. 2017

2017 IEEE MTT-S International Microwave Symposium (IMS)

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This paper presents a helical resonator bandpass filter produced using a stereolighography (SLA) based 3-D printing technique. The filter is formed of four coupled helical resonators, and for each resonator the helix is fixed at both ends so that the resonator is less prone to vibration. The helix is designed to have variable width and this yields enhanced performance in terms of a higher unloaded quality factor and a spurious resonance at higher frequencies. Such a helix is ideally suited to 3-D printing which allows easy production of complex structures. The whole filter is printed from a resin, then plated with metal, and tested.The measured result has a good agreement with simulations.

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Helical resonator with modulated radius for improved multipactor threshold: Numerical and experimental results

Cited by 4 publications

References 4 publications

Low-Profile and Low-Volume Split-Distributed Resonators and Filters

Low-Profile and Low-Volume Split-Distributed Resonators and Filters

Helical resonator filters with improved multipactor performance exploiting rigorous modelling and the large gap approach

3-D printed filter based on helical resonators with variable width

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