Multipactor Effect Characterization of Dielectric Materials for Space Applications

Vague, Joaquin; Melgarejo, Juan Carlos; Guglielmi, M.; Boria, Vicente E.; Anza, S.; Vicente, C.; Moreno, Ma Rocio; Taroncher, M.; Martínez, Benito Gimeno; Raboso, D.

doi:10.1109/tmtt.2018.2845869

Cited by 43 publications

(20 citation statements)

References 29 publications

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“…where f is the analysis frequency, g is the considered gap (g = r ex − r in for the y-direction and g = L for the z-direction), σ is the iris fringing factor (σ = 1 for the z-direction, but for the r-direction it is defined from the appropriate gap to iris thickness ratio chart in [10] or Fig. 7b, γ is multipactor breakdown factor (γ = 63 V/(GHz ⋅ mm) for the z-direction and γ = 46 V/(GHz ⋅ mm) for the y-direction where the gap is PTFE filled [13]). The gap effective impedance Z eff is found from the EM simulation based on how the considered gap voltage V g is related to the incident wave power P in delivered to the filter, i.e.…”

Section: Multipactor Breakdownmentioning

confidence: 99%

New coaxial low-pass filters with ultra-wide and spurious free stopband

Goulouev

McLaren

Pardo

2021

Int. J. Microw. Wireless Technol.

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Modern space communication systems often need high-power low-frequency (UHF, L-, S-, and C-band) low-pass filters (LPFs) with wide stopbands extending to Ka-band and beyond. Current design approaches frequently fail to meet these requirements completely. This paper proposes a new coaxial LPF concept and design methodology. The LPF consists of an array of cavity elements, which operate with transverse electromagnetic mode (TEM) and transverse magnetic (TM)-coupled resonances, and thus achieve a frequency response with a reflection zero at DC and transmission zeroes at targeted stopband locations. The design method is based on positioning the cavities in a quasi-periodic order, which efficiently spreads the transmission zeroes over the stopband, while keeping the characteristic impedance matched to the input/output interfaces over the passband. This design concept yields an ultra-wide, continuous and modal spurious-free stopband, while maintaining a low insertion loss, high peak power capacity, and low sensitivity to production tolerances.

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Section: Multipactor Breakdownmentioning

confidence: 99%

New coaxial low-pass filters with ultra-wide and spurious free stopband

Goulouev

McLaren

Pardo

2021

Int. J. Microw. Wireless Technol.

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“…For this purpose, the voltages (Vab) between points "a" and "b" in Fig. 12 have been computed, for each ferrite, considering an input power level of 1 W. Following then the technique already used in [22] for dielectric materials, and using the simulated results provided by SPARK3D, we have finally obtained the multipactor breakdown voltages in the areas of interest (the gaps between ferrite disks). The results obtained are collected in TABLE V.…”

Section: Multipactor Characterizationmentioning

confidence: 99%

“…More recently [21], the multipactor effect between two ferrite samples, made of a garnet doped with Holmium used in a two-port isolator working at 10.75 GHz, was studied with an accurate electron tracking code (ETC), previously employed with dielectric materials [22]. In this context, therefore, the objective of this expanded work is to validate such three dimensional (3D) EM-based PIC code with a measurement campaign of the multipactor discharges between ferrite disks.…”

Section: Introductionmentioning

confidence: 99%

Experimental Validation of Multipactor Effect for Ferrite Materials Used in L- and S-Band Nonreciprocal Microwave Components

Vague

Melgarejo

Boria

et al. 2019

IEEE Trans. Microwave Theory Techn.

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This paper reports on the experimental measurement of power threshold levels for the multipactor effect between samples of ferrite material typically used in the practical implementation of Land S-bands circulators and isolators. For this purposes, a new family of wide-band, non-reciprocal rectangular waveguide structures loaded with ferrites has been designed with a full-wave electromagnetic simulation tool. The design includes also the required magneto-static field biasing circuits. The multipactor breakdown power levels have also been predicted with an accurate electron tracking code using measured values for the Secondary Electron Yield (SEY) coefficient. The measured results agree well with simulations thereby fully validating the experimental campaign.

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“…The analysis is focused on CW excitation, as this is the most common situation considered in practice and in the technical literature. In addition, dielectric and/or magnetic media is out of the scope of this paper, due to its higher complexity [26], [30]. This paper will therefore contribute to provide guidelines for selecting the most suitable procedure (and the corresponding simulator, if needed) in order to obtain multipactor threshold estimates.…”

Section: Introductionmentioning

confidence: 99%

Multipactor Threshold Estimation Techniques Based on Circuit Models, Electromagnetic Fields, and Particle Simulators

González

Alcaide

Marin³

et al. 2022

IEEE J. Microw.

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Multipactor has become a keylimiting factor of the final performance of satellite communication systems, due to the increase in power levels and/or operating frequency bands. As a result, the critical components of these systems must meet demanding multipactor specifications which should be considered during the design process. This paper describes the different techniques available to predict the multipactor threshold power for radio frequency (RF) and microwave passive hardware under continuous wave (CW) excitation, from cumbersome particle simulations to fast approximate methods based on circuit models. All these techniques have been described and compared together for the first time, including also a detailed description of the configuration issues of commercial particle simulators required to obtain accurate multipactor threshold predictions. The techniques are applied to both wideband and narrowband application examples. The predictions have been compared with measured thresholds of manufactured samples obtained with a novel multipactor test bed, thus allowing to highlight the advantages and limitations of each technique and particle simulator. From this paper, it will be possible to choose the most suitable procedure (and an appropriate simulator, if needed) to obtain multipactor threshold prediction of passive hardware.

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Multipactor Effect Characterization of Dielectric Materials for Space Applications

Cited by 43 publications

References 29 publications

New coaxial low-pass filters with ultra-wide and spurious free stopband

New coaxial low-pass filters with ultra-wide and spurious free stopband

Experimental Validation of Multipactor Effect for Ferrite Materials Used in L- and S-Band Nonreciprocal Microwave Components

Multipactor Threshold Estimation Techniques Based on Circuit Models, Electromagnetic Fields, and Particle Simulators

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