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

Vague, Joaquin; Melgarejo, Juan Carlos; Boria, Vicente E.; Guglielmi, M.; Juan, M. Emília; Reglero, Marta; Montero, I.; Gonzalez-Iglesias, D.; Gimeno, B.; Gómez, Ana Almaraz; Vegas, Α.; Raboso, D.

doi:10.1109/tmtt.2019.2915546

Cited by 12 publications

(4 citation statements)

References 20 publications

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“…Due to the complex nature of the nonlinear multipactor effect, its computational analysis involves Monte Carlo simulations. Different techniques have been developed for the multipactor threshold prediction of parallel-plate geometries in vacuum [17], [18], partially filled with dielectric materials [19], [20], [21] or ferrites [22], [23], and also in more complex RF geometries, such as coaxial transmission lines [24], [25] and rectangular [26], elliptical [27], or ridge/multiridge waveguides [28]. Moreover, nonstationary statistical theories providing a more faithful representation of the multipactor process have been presented too [29], [30], [31], [32], [33].…”

Section: Introductionmentioning

confidence: 99%

A Genetically Based Algorithm to Improve Execution Speed in Multipactor Simulations in Parallel-Plate Waveguides

Cervera-Marín,

Jodar,

Alcaide Guillén

et al. 2024

IEEE Trans. Electron Devices

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This article presents an approach to enhance the convergence speed of Monte Carlo simulations for multipactor phenomena in parallel-plate geometries. Multipactor, a self-sustained electron discharge, may cause significantly harmful effects in electronic device operation. An adaptive genetic modification method is introduced to explore the parameter space of electron trajectories efficiently, leading to rapid identification of the critical combinations that induce population growth or decay. The proposed approach involves modifying key parameters, such as the initial phases and kinetic energies of individual particles, based on their performance in multipactor simulations. The reported results demonstrate a substantial improvement in convergence speed, achieving accurate results with fewer tracked particles. The adaptive genetic modification proves to be a promising technique for fast multipactor threshold predictions in parallel-plate configurations and has potential applications when analyzing electron-induced phenomena in a wide range of electronic systems.

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Section: Introductionmentioning

confidence: 99%

A Genetically Based Algorithm to Improve Execution Speed in Multipactor Simulations in Parallel-Plate Waveguides

Cervera-Marín,

Jodar,

Alcaide Guillén

et al. 2024

IEEE Trans. Electron Devices

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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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“…Because of its high cost, testing must not be considered as an intermediate stage in the design process, but a final verification which certifies the correct operation of the device. However, with increasing complexity in terms of geometry [3], [4], materials [5], [6], and surface finishing, achieving accurate multipactor simulations becomes a challenge. Modeling tools have seen large advances recently [7]- [9], and simulations with modulated signal [10], [11], space charge [12], multiple materials [13], [14], or simple noise characterization [15] are common nowadays.…”

Section: Introductionmentioning

confidence: 99%

High Power RF Discharge Detection Technique Based on the In-Phase and Quadrature Signals

Monerris-Belda¹,

Marin²,

Jodar³

et al. 2021

IEEE Trans. Microwave Theory Techn.

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High power radio frequency (RF) breakdown testing is a subject of great relevance in the space industry, due to the increasing need of higher transmission power and smaller devices. This work presents a novel RF breakdown detection system, which monitors the same parameters as the microwave nulling system but with several advantages. Where microwave nulling-a de facto standard in RF breakdown testing-is narrowband and requires continuous tuning to keep its sensitivity, the proposed technique is broadband and maintains its performance for any RF signal. On top of that, defining the detection threshold is cumbersome due to the lack of an international standardized criterion. Small responses may appear in the detection system during the test and, sometimes, it is not possible to determine if these are an actual RF breakdown or random noise. This new detection system uses a larger analysis bandwidth, thus reducing the cases in which a small response is difficult to be classified. The proposed detection method represents a major step forward in high power testing as it runs without human intervention, warning the operator or decreasing the RF power automatically much faster than any human operator.

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

Cited by 12 publications

References 20 publications

A Genetically Based Algorithm to Improve Execution Speed in Multipactor Simulations in Parallel-Plate Waveguides

A Genetically Based Algorithm to Improve Execution Speed in Multipactor Simulations in Parallel-Plate Waveguides

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

High Power RF Discharge Detection Technique Based on the In-Phase and Quadrature Signals

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