Reglero Mangada, Marta Sofía

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Instituto Universitario de Telecomunicación y Aplicaciones Multimedia

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Helical resonator filters with improved multipactor performance exploiting rigorous modelling and the large gap approach
(Institution of Electrical Engineers, 2019-08-14) Salza, Giuseppe; Goussetis, George; Vicente, Carlos; Kosmopoulos, Savvas; Reglero Mangada, Marta Sofía; Taroncher Calduch, Mariam; Boria Esbert, Vicente Enrique; Sidiropoulos, Nikolas; Galdeano, Jaione; Escuela Técnica Superior de Ingeniería de Telecomunicación; Departamento de Comunicaciones; Instituto Universitario de Telecomunicación y Aplicaciones Multimedia
[EN] 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 (TM)) 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.
Experimental Validation of Multipactor Effect for Ferrite Materials Used in L- and S-Band Nonreciprocal Microwave Components
(Institute of Electrical and Electronics Engineers, 2019-06) Vague Cardona, José Joaquín; Melgarejo-Lermas, Juan Carlos; Boria Esbert, Vicente Enrique; GUGLIELMI, MARCO; Moreno Cambroreno, María del Rocío; Reglero Mangada, Marta Sofía; Mata-Sanz, Rafael; Montero, Isabel; Gonzalez Iglesias, Daniel; GIMENO MARTINEZ, BENITO; Gomez, Alvaro; Vegas, Ángel; RABOSO GARCÍA-BAQUERO, DAVID; Escuela Técnica Superior de Ingeniería de Telecomunicación; Departamento de Comunicaciones; Instituto Universitario de Telecomunicación y Aplicaciones Multimedia; European Space Agency; Ministerio de Economía y Competitividad
[EN] 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 L-and S-band circulators and isolators. For this purposes, a new family of wideband, nonreciprocal rectangular waveguide structures loaded with ferrites has been designed with a full-wave electromagnetic simulation tool. The design also includes the required magnetostatic 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.
Enhancement of corona discharge thresholds in microstrip bandpass filters by using cover-ended resonators
(Cambridge University Press, 2021-09) Morales-Hernández, Aitor; Sánchez-Soriano, Miguel Á.; Marini, Stephan; Reglero Mangada, Marta Sofía; Esteve, Laura; Boria Esbert, Vicente Enrique; Guglielmi, Marco; Escuela Técnica Superior de Ingeniería de Telecomunicación; Departamento de Comunicaciones; Instituto Universitario de Telecomunicación y Aplicaciones Multimedia; Universidad de Alicante; AGENCIA ESTATAL DE INVESTIGACION; Agencia Estatal de Investigación
[EN] This paper studies the corona discharge power thresholds in microstrip bandpass filters (BPFs) and, in particular, is focused on a solution based on lambda/2 cover-ended resonators to enhance their peak power handling capability (PPHC). First, a parametric analysis is carried out to evaluate the variation of the maximum electric field and the unloaded quality factor (Q(u)) as a function of the cover's geometrical dimensions (i.e. height, length, and width). Next, several microstrip BPFs centered at 1.6 GHz are designed, and their behaviors under moderate-to-high applied RF power signals are simulated to corroborate the previous study. A suitable number and size of covers are selected to enhance PPHC without barely degrading the filters' electrical performance and, consequently, without hardly increasing the insertion losses. Finally, two third-order filters with covers and without covers (benchmark prototype) are manufactured, by way of illustration, and they are tested in the European High-Power RF Space Laboratory to validate the good performance of the proposed solution, where a PPHC enhancement of 3.1 dB at high pressures is achieved as compared to the benchmark prototype.
Study of the Multipactor Effect in Groove Gap Waveguide Technology
(Institute of Electrical and Electronics Engineers, 2022-05) Vague Cardona, José Joaquín; Asensio, Irene; Coves, Ángela; San Blas, Ángel A.; Reglero Mangada, Marta Sofía; Vidal Pantaleoni, Ana; Raboso, David; Baquero Escudero, Mariano; Boria Esbert, Vicente Enrique; Escuela Técnica Superior de Ingeniería de Telecomunicación; Departamento de Comunicaciones; Instituto Universitario de Telecomunicación y Aplicaciones Multimedia; AGENCIA ESTATAL DE INVESTIGACION; Agencia Estatal de Investigación; European Regional Development Fund
[EN] This article presents a theoretical and experimental comparative study of the different multipactor threshold values obtained in the rectangular waveguide (RW) and the groove gap waveguide (GGW). To this end, the multipactor effect has been first analyzed in an RW with a recently developed theoretical model. Then, the multipactor breakdown power levels in the equivalent GGW have been predicted with an accurate electron tracking code, showing a significant increment compared with the RW case. In order to validate these results, two E-plane WR-90 RW transformers have been designed with a full-wave electromagnetic simulation tool. The central sections of these transformers have been implemented in RW and GGW, respectively, and their multipactor breakdown power levels have also been predicted. The two designed transformers have been fabricated in aluminum and then measured in terms of electrical response (scattering parameters) and RF multipactor effect (power threshold values). All the experimental results agree well with the set of simulated data, thus fully validating the performed study.